Specific and Chemoselective Multi-α-arylation Reaction of Benzoylformic Acid with or without Decarbonylation in P<sub>2</sub>O<sub>5</sub>−MsOH and Related Acidic Media
P(2)O(5)-MsOH, or relatedacidicmedia, benzoylformic acid (1) undergoes three types of di- or mono-alpha-arylation reactions with or without decarbonylation ((1) decarbonylative alpha, alpha-diarylation, yielding triarylmethanols 6, (2) decarbonylative alpha-monoarylation, giving benzophenone derivatives 7, and (3) alpha,alpha-diarylation without decarbonylation, affording diarylated carboxylic acids 5) and
Lund, Journal of the American Chemical Society, 1927, vol. 49, p. 1348
作者:Lund
DOI:——
日期:——
Kauffmann; Kieser, Chemische Berichte, 1912, vol. 45, p. 2334
作者:Kauffmann、Kieser
DOI:——
日期:——
WO2008/11508
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A Convenient Preparation of Xanthene Dyes
作者:Youjun Yang、Jorge O. Escobedo、Alexander Wong、Corin M. Schowalter、Michael C. Touchy、Lijuan Jiao、William E. Crowe、Frank R. Fronczek、Robert M. Strongin
DOI:10.1021/jo051002a
日期:2005.8.1
A facile synthetic route utilizing readily available reagents affords a series of regioisomerically pure xanthene dye derivatives. Advantages include relatively mild conditions and good to excellent yields. Nonpolar, highly crystalline intermediates are isolable by standard chromatographic techniques. The intermediates are in the requisite xanthene oxidation state, thus avoiding the need for relatively