Determination of Absolute Configuration Using Kinetic Resolution Catalysts
作者:Alexander J. Wagner、Jonathan G. David、Scott D. Rychnovsky
DOI:10.1021/ol201902y
日期:2011.8.19
A new method was developed to assign the absoluteconfiguration of molecules using kinetic resolution catalysts. Secondary alcohols were acylated in the presence of Birman’s S-HBTM and R-HBTM catalysts, and the fast-reacting catalyst was identified by NMR analysis of the reaction mixture. A mnemonic was developed to assign configuration based on the identity of the fast-reacting catalyst. The method
Total Synthesis of (±)- and (−)-Actinophyllic Acid
作者:Connor L. Martin、Larry E. Overman、Jason M. Rohde
DOI:10.1021/ja100178u
日期:2010.4.7
acid upon exposure to HCl and paraformaldehyde. This concisesecond-generation total synthesis of (+/-)-actinophyllic acid is realized in 22% overall yield from commercially available di-tert-butyl malonate and o-nitrophenylacetic acid by a sequence that proceeds by way of only six isolated intermediates. The first enantioselective total synthesis of (-)-actinophyllic acid (1) is accomplished by this