The First General Enantioselective Catalytic Diels−Alder Reaction with Simple α,β-Unsaturated Ketones
作者:Alan B. Northrup、David W. C. MacMillan
DOI:10.1021/ja017641u
日期:2002.3.1
The first general approach to enantioselectivecatalysis of the Diels−Alderreaction with simple ketone dienophiles has been accomplished. The use of iminium catalysis has enabled enantioselective access to a fundamental Diels−Alderreaction variant that has previously been unavailable using chiral Lewis acid catalysis. A new chiral amine catalyst has been developed that allows a variety of monodentate
The invention relates to 2-,5-,6-,7-,8-substituted oct-2-en-4-ones, to a process for delivering these compounds as a fragrance, an aroma, or a flavoring, and to fragrance and aroma compositions prepared therewith.