Design and Development of Highly Effective Lewis Acid Catalysts for Enantioselective Diels−Alder Reactions
作者:Yong Huang、Tetsuo Iwama、Viresh H. Rawal
DOI:10.1021/ja026088t
日期:2002.5.1
report describes the design and development of chiral Co(III)-salen catalysts for enantioselectiveDiels-Alderreactions. A crystal structure of a Co-salen catalyst with two equivalents of benzaldehyde provided insight on the factors that may be important for enantioselectivity. On the basis of this structural information, new catalysts were prepared in which the "bay region" tert-butyl groups were replaced
fluorine-containing groups, trifluoromethylarylethers (ArOCF3) have unique properties in drug design and are difficult to be synthesized, and many different methods were developed to prepare them. A novel one-pot synthesis of o-iodine-aryl trifluoromethylethers (ArOCF3I) was described by the reaction of trifluoromethoxylation and iodination with trifluoromethylaryl sulfonates (TFMS) in this manuscript