AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

The anhydro base of an N-methyllepidinium salt reacts with s-tetrazines to give spiro hetarenes with 4,5- and 1,4-dihydropyridazine structures. The regioselectivity of the cycloaddition was established. In addition to spiro annelation, intramolecular cyclization to give compounds with a carcass structure, for which x-ray diffraction analysis was carried out, occurs when s-tetrazines with α-pyridyl substituents are used.

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

A new method of spiro-ring formation by the reaction of s-tetrazines with anhydro bases was described. The prototropic transitions were detected in the pyridazine fragments of the resulting spirocyclic compounds. The heterocycles of the anhydro bases are converted to cyclic ketones as a result of the breaking of the spiro junction in the acidic hydrolysis of the spirohetarenes. The regioselectivity of the cycloaddition was established.

Chemischer InformationsdienstVolume 16, Issue 42 Organic Dyes ChemInform Abstract: STRUCTURE AND COLOR OF PROTONATED FORMS OF BENZIMIDAZOLYLFORMAZANS A. I. YALANDINA, A. I. YALANDINASearch for more papers by this authorE. G. KOVALEV, E. G. KOVALEVSearch for more papers by this authorG. N. LIPUNOVA, G. N. LIPUNOVASearch for more papers by this authorN. P. BEDNYAGINA, N. P. BEDNYAGINASearch for more papers by this authorL. G. EGOROVA, L. G. EGOROVASearch for more papers by this authorL. L. LOPOVA, L. L. LOPOVASearch for more papers by this author A. I. YALANDINA, A. I. YALANDINASearch for more papers by this authorE. G. KOVALEV, E. G. KOVALEVSearch for more papers by this authorG. N. LIPUNOVA, G. N. LIPUNOVASearch for more papers by this authorN. P. BEDNYAGINA, N. P. BEDNYAGINASearch for more papers by this authorL. G. EGOROVA, L. G. EGOROVASearch for more papers by this authorL. L. LOPOVA, L. L. LOPOVASearch for more papers by this author First published: October 22, 1985 https://doi.org/10.1002/chin.198542323AboutPDF 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. Volume16, Issue42October 22, 1985 RelatedInformation

Benzimidazolyl formazans were titrated spectrophotometrically and their base constants were determined. On the basis of quantum mechanical calculations of electron spectra a hypothesis concerning the chelate structure of the unsymmetrical benzimidazolyl formazans is proposed.

Chemischer InformationsdienstVolume 13, Issue 14 Heterocyclic Compounds ChemInform Abstract: CYCLOADDITION TO S-TETRAZINES (CARBONI-LINDSEY REACTION) E. G. KOVALEV, E. G. KOVALEVSearch for more papers by this authorI. YA. POSTOVSKII, I. YA. POSTOVSKIISearch for more papers by this authorG. L. RUSINOV, G. L. RUSINOVSearch for more papers by this authorI. L. SHEGAL, I. L. SHEGALSearch for more papers by this author E. G. KOVALEV, E. G. KOVALEVSearch for more papers by this authorI. YA. POSTOVSKII, I. YA. POSTOVSKIISearch for more papers by this authorG. L. RUSINOV, G. L. RUSINOVSearch for more papers by this authorI. L. SHEGAL, I. L. SHEGALSearch for more papers by this author First published: April 6, 1982 https://doi.org/10.1002/chin.198214233AboutPDF 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. Volume13, Issue14April 6, 1982 RelatedInformation

The available data on the reaction of sym-tetrazines with various unsaturated compounds from 1958 to 1980 are systematized. The reaction of sym-tetrazines with alkenes, alkadienes, alkynes, and unsaturated carbocycles and heterocycles are presented.

AbstractDurch Einwirkung des Tetrazinderivates (I) auf die Anhydrobase (II) von 1,2,3‐Trimethyl‐chinoxalin (II) (entstanden in situ aus dem Methoiod‐id von 2,3‐Dimethylchinoxalin bei Zugabe von Triethylamin) erhält man unter Stickstoff‐Abspaltung das Azomethin (III).