Amongst the multiple catalysts that have been shown lately together with the outstanding development of the organocatalysis, chiral phosphoric acids derived from BINOL, have proved to be an excellent option for the performance of a wide range of reactions, being nowadays an essential tool when referring to asymmetric synthesis. This review compiles the most relevant characteristics of this type of catalysts as well as describing the multiple reactions developed in this area.
The first page of this article is displayed as the abstract.
The first page of this article is displayed as the abstract.
T. M. Lowry and G. Jessop, J. Chem. Soc., 1931, 323 DOI: 10.1039/JR9310000323
F. L. Gilbert, R. R. Goldstein and T. M. Lowry, J. Chem. Soc., 1931, 1092 DOI: 10.1039/JR9310001092
T. M. Lowry and G. Owen, Trans. Faraday Soc., 1930, 26, 371 DOI: 10.1039/TF9302600371
T. M. Lowry and G. Jessop, J. Chem. Soc., 1930, 1005 DOI: 10.1039/JR9300001005
T. M. Lowry and G. Jessop, J. Chem. Soc., 1930, 782 DOI: 10.1039/JR9300000782
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Mutarotation of GalactoseT. M. LowryT. M. LowryMore by T. M. Lowry and G. F. SmithG. F. SmithMore by G. F. SmithCite this: J. Phys. Chem. 1929, 33, 1, 9–21Publication Date (Print):January 1, 1929Publication History Published online1 May 2002Published inissue 1 January 1929https://doi.org/10.1021/j150295a002Request reuse permissionsArticle Views135Altmetric-Citations7LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (604 KB) Get e-Alerts
The first page of this article is displayed as the abstract.
T. M. Lowry and W. V. Lloyd, J. Chem. Soc., 1929, 1376 DOI: 10.1039/JR9290001376
T. M. Lowry and G. Jessop, J. Chem. Soc., 1929, 1421 DOI: 10.1039/JR9290001421
A. J. Berry and T. M. Lowry, J. Chem. Soc., 1928, 1748 DOI: 10.1039/JR9280001748
G. F. Smith and T. M. Lowry, J. Chem. Soc., 1928, 666 DOI: 10.1039/JR9280000666
T. M. Lowry, R. R. Goldstein and F. L. Gilbert, J. Chem. Soc., 1928, 307 DOI: 10.1039/JR9280000307
A large number of ultra-violet polarimetric measurements have been made by a method described by one of us in 1908.* In this method a triple-field polarimeter, with Foucault in place of Nicol prisms, is arranged in series with a quartz or quartz-calcite spectrograph. A quartz-calcite lens, replacing the eyepiece of the polarimeter, casts a real image of the triple field on the slit of the spectrograph, and thus gives rise to a triply divided spectrum, intersected by dark bands. The wave-length corresponding with a given rotation is determined by finding a line which is of equal intensity in the three fields. The approximate form of the curve of rotatory dispersion can be determined by setting the analyser in a series of positions separated by 5° or 10° ; but it is then advisable to “bracket” some of the more conspicuous lines by making fresh exposures at intervals of perhaps 0·2°, when the rotation corresponding with the wave-length of a given line can be determined within about 0·1°. This degree of accuracy is less than that which can be reached in the central part of the visible spectrum, where the readings may be reproduced under favourable conditions within about 0·01° ; but it is not appreciably less than the accuracy of visual readings in the red and violet regions, and for many purposes is quite satisfactory. Thus, with a column of quartz 496 mm. in length, readings to 1° sufficed to give the rotatory power in degrees per millimetre within 0·002°, corresponding with an error of about 1 part in 100,000 at wave-length 2327. The present investigation was undertaken in order to find out whether the same apparatus could be used to record with sufficient accuracy the much smaller rotations of solutions which had been largely diluted, in order to render them transparent in a region near to (or covered by) an absorption band. For this purpose the concentration is often reduced to I per cent. : the observed rotations may then be of the order of 0·5°, and must be read to 0·01° or less in order to give a true impression of the form of the curve of rotatory dispersion.
T. M. Lowry, J. Chem. Soc., 1927, 2554 DOI: 10.1039/JR9270002554
The first page of this article is displayed as the abstract.
The first page of this article is displayed as the abstract.
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