Mechanism of 3‘,5‘-Dimethoxybenzoin Ester Photochemistry: Heterolytic Cleavage Intramolecularly Assisted by the Dimethoxybenzene Ring Is the Primary Photochemical Step
作者:Yijian Shi、John E. T. Corrie、Peter Wan
DOI:10.1021/jo971121t
日期:1997.11.1
Mechanistic Studies on the Photochemical Deprotection of 3′,5′‐Dimethoxybenzoin Esters
作者:Michael C. Pirrung、Tong Ye、Zheng Zhou、John D. Simon
DOI:10.1562/2006-02-07-ra-798
日期:2006.9
theoretical evidence suggest the mechanism is heterolysis of the singlet excited state to form a carboxylate and the alpha-ketocation. The alpha-ketocation has been observed by transient spectroscopy. We propose the alpha-ketocation undergoes electrocyclization to an intermediate with extended conjugation, whose deprotonation gives the observed benzofuran product. A Bronsted study of the rates of benzofuran
A convenient and selective synthesis of unsymmetrical benzoins via the cyanide ion catalyzed cleavage of benzils
作者:Ayhan S Demir、Ömer Reis
DOI:10.1016/j.tet.2004.03.016
日期:2004.4
The cyanide ion-catalyzed cleavage of benzils is used for the generation of various ‘masked’ acyl intermediates. The reaction of these intermediates with various aldehydes furnishes the corresponding esters of unsymmetrical benzoins in very good yields. A variety of unsymmetrical benzoin derivatives are synthesized in this way, including ferrocene derivatives. The hydrolysis of benzoin esters and their