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1X-Ray Studies on Potent New Curariform Agents. Part 3. Crystal and Molecular Structure of 1-Methyl-2-phenyl-3-hydroxymethylimidazo[1,2-a]pyridinium Chloride

DJ POINTER,JB WILFORD,MB HURSTHOUSE,NPC WALKER

AbstractThe structure of the title compound (I), representative of a new series of powerful, selective, monoquaternary neuromuscular blocking systems, has been determined by X‐ray analysis (space group: P21/n; Z=4).

1986Chemischer Informationsdienst（1986）引用：5

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2Structure of Diammonium 2-Oxo-1,3-propanedisulphonate, 2NH4+.C3H4O7S22−

JAJ JARVIS,DJ POINTER, JS SHEVELS,JB WILFORD

1983ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS（1983）引用：2

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3X-Ray Studies on Potent New Curariform Agents. Part 2. the Crystal and Molecular Structure of 3,3′-Thiobis-(2-methyl-1-phenylimidazo[1,5-a]pyridinium) Bistetrafluoroborate(iii)

DJ POINTER,JB WILFORD, JD LEE

The structure of the title compound, representative of a new series of powerful and selective neuromuscular blocking agents has been determined by a three-dimensional X-ray analysis. Monoclinic crystals in space group P21/c have lattice parameters a= 15.517(2), b= 14.054(3), c= 13.862(2)Å, β= 108.88(1)°, and Z= 4. The structure was solved by centro-symmetric symbolic addition and refined by full-matrix least-squares calculations to R= 0.080 for 1 133 reflections. The molecule consists of two identical halves inclined at an angle of 72.8° joined by a sulphide link. Quaternary nitrogen atom separations are all < 4.8 Å, and the non-planarity of the molecule is in striking contrast with related compounds which show comparable activity.

1980Journal of the Chemical Society Perkin transactions II（1980）引用：5

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4ChemInform Abstract: X‐RAY STUDIES ON POTENT NEW CURARIFORM AGENTS. PART 2. THE CRYSTAL AND MOLECULAR STRUCTURE OF 3,3′‐THIOBIS(2‐METHYL‐1‐PHENYLIMIDAZO(1,5‐A)PYRIDINIUM) BISTETRAFLUOROBORATE(III)

D. J. POINTER,J. B. WILFORD, J. D. LEE

Chemischer InformationsdienstVolume 11, Issue 38 Physical Organic Chemistry ChemInform Abstract: X-RAY STUDIES ON POTENT NEW CURARIFORM AGENTS. PART 2. THE CRYSTAL AND MOLECULAR STRUCTURE OF 3,3′-THIOBIS(2-METHYL-1-PHENYLIMIDAZO(1,5-A)PYRIDINIUM) BISTETRAFLUOROBORATE(III) D. J. POINTER, D. J. POINTERSearch for more papers by this authorJ. B. WILFORD, J. B. WILFORDSearch for more papers by this authorJ. D. LEE, J. D. LEESearch for more papers by this author D. J. POINTER, D. J. POINTERSearch for more papers by this authorJ. B. WILFORD, J. B. WILFORDSearch for more papers by this authorJ. D. LEE, J. D. LEESearch for more papers by this author First published: September 23, 1980 https://doi.org/10.1002/chin.198038073AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat No abstract is available for this article. Volume11, Issue38September 23, 1980 RelatedInformation

1980

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5Crystal and Molecular Structure of 3,3′-Thio-bis-(2-methyl-1-phenylimidazo-[1,5-a]pyridinium) Bistetrafluoroborate; a Potent New Sulphur-Containing Curariform Agent

DJ POINTER,JB WILFORD

Determination of the X-ray structure of the title compound, a new diquaternary monosulphide having potent neuromuscular blocking activity, has shown that the intramolecular distances between potential quaternary nitrogens are less than 4·81 Å; the non-planarity of the molecule is in striking contrast with related compounds which show comparable activity.

1978Journal of the Chemical Society Chemical Communications（1978）引用：5

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6Use of Lanthanide Shift-Reagents in A Reaction-Product Analysis - Methylation of 2-Methyl-4(5)-phenylimidazole

EE GLOVER,DJ POINTER

1976CHEMISTRY & INDUSTRY（1976）

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7ChemInform Abstract: DIE KRISTALLSTRUKTUR EINER NEUEN VERBINDUNG MIT CURARE‐WIRKUNG

D. J. POINTER,J. B. WILFORD,D. C. BISHOP

Chemischer InformationsdienstVolume 4, Issue 3 Heterocyclic Compounds ChemInform Abstract: DIE KRISTALLSTRUKTUR EINER NEUEN VERBINDUNG MIT CURARE-WIRKUNG D. J. POINTER, D. J. POINTERSearch for more papers by this authorJ. B. WILFORD, J. B. WILFORDSearch for more papers by this authorD. C. BISHOP, D. C. BISHOPSearch for more papers by this author D. J. POINTER, D. J. POINTERSearch for more papers by this authorJ. B. WILFORD, J. B. WILFORDSearch for more papers by this authorD. C. BISHOP, D. C. BISHOPSearch for more papers by this author First published: January 16, 1973 https://doi.org/10.1002/chin.197303263Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat No abstract is available for this article. Volume4, Issue3January 16, 1973 RelatedInformation

1973

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8DIE KRISTALLSTRUKTUR EINER NEUEN VERBINDUNG MIT CURARE-WIRKUNG

D. J. Pointer, J. Wilford,D. C. Bishop

1973

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9ChemInform Abstract: KRISTALL‐ UND MOLEKULARSTRUKTUR VON 1,1′‐AZO‐2‐PHENYL‐IMIDAZO(1,2‐A)PYRIDINIUMDIBROMID, NEUES CURARIFORM‐MITTEL

D. J. POINTER,J. B. WILFORD

Chemischer InformationsdienstVolume 4, Issue 10 Physical Organic Chemistry ChemInform Abstract: KRISTALL- UND MOLEKULARSTRUKTUR VON 1,1′-AZO-2-PHENYL-IMIDAZO(1,2-A)PYRIDINIUMDIBROMID, NEUES CURARIFORM-MITTEL D. J. POINTER, D. J. POINTERSearch for more papers by this authorJ. B. WILFORD, J. B. WILFORDSearch for more papers by this author D. J. POINTER, D. J. POINTERSearch for more papers by this authorJ. B. WILFORD, J. B. WILFORDSearch for more papers by this author First published: March 6, 1973 https://doi.org/10.1002/chin.197310084AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat No abstract is available for this article. Volume4, Issue10March 6, 1973 RelatedInformation

1973Chemischer Informationsdienst（1973）

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10Crystal and Molecular Structure of Exo-7,11-methano-5,6a,7,7a,10,11,11a-octahydrobenz[c]indeno[5,6-e]thiazine 6-Oxide

DJ POINTER,JB WILFORD

The structure of the title compound has been determined by a three-dimensional X-ray analysis. The monoclinic unit cell (space group P21/c) has dimensions a= 7·02 b= 12·86 c= 14·35 Å and β= 92·04° for Z= 4. The structure was solved by centrosymmetric symbolic addition and refined by least-squares calculations to R 0·103 for 2201 reflections. The molecule has exo-stereochemistry and is a racemic compound, with enantiomeric molecules forming centrosymmetric dimers through pairs of N–H ⋯ OS hydrogen bonds.

1972JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 2（1972）引用：6

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11Crystal and Molecular Structure of 1,1′-Azo-2-phenylimidazo[1,2-a]-pyridinium Dibromide: a New Curariform Agent

DJ POINTER,JB WILFORD

The structure of the title compound, a powerful selective, neuromuscular blocking agent has been determined by a three-dimensional X-ray analysis. Crystals are monoclinic, space-group P21/c, with lattice parameters a=9·15(1), b= 12·05(1), c= 12·61(1)Å, β= 121·90(3)°, and Z= 2. The structure was solved by the heavy-atom method and refined by least-squares calculations to R 0·112 for 1698 reflections. The molecule consists of two identical halves joined by a 2-tetrazene link across a centre of symmetry. Phenyl rings are inclined at 47·5° to the rest of the molecule.

1972Journal of the Chemical Society Perkin transactions II（1972）引用：16

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12ChemInform Abstract: KRISTALL‐ UND MOLEKULARSTRUKTUR VON EXO‐7,11‐METHANO‐5,6A,7,7A,10,10A,11,11A‐OKTAHYDROBENZ(C)INDENO(5,6‐E)THIAZIN‐6‐OXID

D. J. POINTER,J. B. WILFORD,K. M. CHUI

Chemischer InformationsdienstVolume 3, Issue 39 Heterocyclic Compounds ChemInform Abstract: KRISTALL- UND MOLEKULARSTRUKTUR VON EXO-7,11-METHANO-5,6A,7,7A,10,10A,11,11A-OKTAHYDROBENZ(C)INDENO(5,6-E)THIAZIN-6-OXID D. J. POINTER, D. J. POINTERSearch for more papers by this authorJ. B. WILFORD, J. B. WILFORDSearch for more papers by this authorK. M. CHUI, K. M. CHUISearch for more papers by this author D. J. POINTER, D. J. POINTERSearch for more papers by this authorJ. B. WILFORD, J. B. WILFORDSearch for more papers by this authorK. M. CHUI, K. M. CHUISearch for more papers by this author First published: September 26, 1972 https://doi.org/10.1002/chin.197239095AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat No abstract is available for this article. Volume3, Issue39September 26, 1972 RelatedInformation

1972Chemischer Informationsdienst（1972）

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13ChemInform Abstract: NACHWEIS EINER VERSCHIEDENEN STEREOCHEMISCHEN STRUKTUR BEI VERWANDTEN DIEN‐ADDITIONSPRODUKTEN DURCH ROENTGENUNTERSUCHUNG

D. J. POINTER,J. B. WILFORD,O. J. R. HODDER

Chemischer InformationsdienstVolume 3, Issue 2 Preparative Organic Chemistry ChemInform Abstract: NACHWEIS EINER VERSCHIEDENEN STEREOCHEMISCHEN STRUKTUR BEI VERWANDTEN DIEN-ADDITIONSPRODUKTEN DURCH ROENTGENUNTERSUCHUNG D. J. POINTER, D. J. POINTERSearch for more papers by this authorJ. B. WILFORD, J. B. WILFORDSearch for more papers by this authorO. J. R. HODDER, O. J. R. HODDERSearch for more papers by this author D. J. POINTER, D. J. POINTERSearch for more papers by this authorJ. B. WILFORD, J. B. WILFORDSearch for more papers by this authorO. J. R. HODDER, O. J. R. HODDERSearch for more papers by this author First published: January 11, 1972 https://doi.org/10.1002/chin.197202133Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat No abstract is available for this article. Volume3, Issue2January 11, 1972 RelatedInformation

1972Chemischer Informationsdienst

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14Biological Sciences: Crystal Structure of a Novel Curariform Agent

POINTER, D. J.,WILFORD, J. B.,BISHOP, D. C.

THE belief that optimal competitive neuromuscular blockade occurs with compounds having two quaternary centres 12.5 Å apart1,2 has been progressively weakened by the demonstration3 that (+)-tubocurarine is a monoquaternary compound, by the X-ray studies4 on a potent curarizing steroidal derivative* in which the interjacence is 11.1 Å and by the even closer centres (9.7 Å) in the similarly active diallyl bis-nortoxiferine. Further evidence that an interquaternary distance of 12.5 Å is not critical in competitive neuromuscular blocking drugs is provided by the novel 1,1′-azobis-arylimidazo[1,2-a]pyridinium bromides, in which this interjacence is close to 7.5 Å.

1972Nature（1972）引用：25

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15Crystal-Structure of A Novel Curariform Agent

D J Pointer,J B Wilford,D C Bishop

1972Nature（1972）引用：1

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16X-ray Evidence for Contrasting Stereochemistry in Related Diene Addition Products

DJ POINTER,JB WILFORD,OJR HODDER

2,3-Dichloro-5,6-dicyanobenzoquinone(DDQ) reacts readily with 1,5,5-trimethyl-3-methylenecyclohexene to give an adduct having endo-stereochemistry which crystallises in the monoclinic space group P21/n with lattice parameters a= 9·06 ± 0·01, b= 16·10 ± 0·01, c= 12·00 ± 0·01 Å, β= 96° 42′± 5′, Z= 4. In contrast the addition of cyclopentadiene to DDQ under similar conditions yields an exo-stereomer as the principle product which is monoclinic, space group p21/n with unit-cell dimensions a= 8·051 ± 0·005, b= 11·14 ± 0·01, c= 13·55 ± 0·01 Å, β= 94° 28′± 6′, Z= 4. Both structures were solved by centrosymmetric symbolic addition and refined by least-squares calculations to R= 0·112 for 955 reflections and R= 0·082 for 1225 reflections respectively.

1971Journal of the Chemical Society B Physical Organic（1971）引用：16

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17Crystal and Molecular Structure of 8-Carboxy-1-hydroxy-2-oxobicyclo-[3,2,2]non-6-ene-9,4-carbolactone

DJ POINTER,JB WILFORD,KM CHUI

The structure of 8-carboxy-1-hydroxy-2-oxobicyclo[3,2,2]non-6-ene-9,4-carbolactone has been determined by a three-dimensional X-ray analysis. The monoclinic unit cell (space group P21/c) has dimensions a= 8·922, b= 8·801, c= 12·935 Å, and β= 92·85° for Z= 4. The structure was solved by centrosymmetric symbolic addition, and refined by least-squares calculations to R= 0·088 for 1121 reflections. The molecular structure is shown to be that of a racemic compound with two molecules of each enantiomer in the unit cell. The molecules occur as dimers which are strongly hydrogen bonded through the acid groups. The bicyclo[3,2,2]nonene ring system shows flattening of the three-carbon bridge.

1971Journal of the Chemical Society B Physical Organic（1971）引用：7

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18ChemInform Abstract: KRISTALL‐ UND MOLEKULARSTRUKTUR VON 8‐CARBOXY‐1‐HYDROXY‐2‐OXO‐BICYCLO(3,2,2)NON‐6‐EN‐9,4‐CARBOLACTON

D. J. POINTER,J. B. WILFORD,K. M. CHUI

Chemischer Informationsdienst. Organische ChemieVolume 2, Issue 31 Organoelement Compounds ChemInform Abstract: KRISTALL- UND MOLEKULARSTRUKTUR VON 8-CARBOXY-1-HYDROXY-2-OXO-BICYCLO(3,2,2)NON-6-EN-9,4-CARBOLACTON D. J. POINTER, D. J. POINTERSearch for more papers by this authorJ. B. WILFORD, J. B. WILFORDSearch for more papers by this authorK. M. CHUI, K. M. CHUISearch for more papers by this author D. J. POINTER, D. J. POINTERSearch for more papers by this authorJ. B. WILFORD, J. B. WILFORDSearch for more papers by this authorK. M. CHUI, K. M. CHUISearch for more papers by this author First published: August 3, 1971 https://doi.org/10.1002/chin.197131100AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat No abstract is available for this article. Volume2, Issue31August 3, 1971 RelatedInformation

1971Chemischer Informationsdienst Organische Chemie（1971）

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19ChemInform Abstract: DIENSYNTH. MIT 2,3‐DICHLOR‐5,6‐DICYANBENZOCHINON UND ROENTGENSTRUKTURANALYSE

J. POINTER, D,J. B. WILFORD,O. J. R. HODDER

Abstract1,5,5‐Trimethyl‐3‐methylencyclohexen (I) isomerisiert während der Reaktion mit 2,3‐Dichlor‐5,6‐dicyanbenzochinon (II) zu 1,1,4,5‐Tetramethylcyclohexa‐2,4‐dien (III), das mit (II) das Addukt (IV) bildet.

1970Chemischer Informationsdienst Organische Chemie

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20A Diene Synthesis with 2,3-Dichloro-5,6-dicyanobenzoquinone—an X-ray Study

DJ POINTER,JB WILFORD,OJR HODDER

1,5,5-Trimethyl-3-methylenecyclohexene isomerises to 1,1,3,5-tetramethylcyclohexa-2,4-diene during the Diels–Alder reaction with DDQ; the side of the quinone molecule to which addition occurs and the stereochemistry of the adduct formed have been established by X-ray structure analysis.

1969J Chem Soc D（1969）引用：1

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