作者:Rakeshwar B. Chhor、Bernd Nosse、Sebastian Sörgel、Claudius Böhm、Michael Seitz、Oliver Reiser
DOI:10.1002/chem.200390019
日期:2003.1.3
development of a new method for the enantioselective synthesis of disubstituted gamma-butyrolactones is reported. Based on this strategy, the totalsynthesis of three paraconic acids, that is (-)-roccellaricacid, (-)-nephrosteranicacid and (-)-protopraesorediosic acid, and the formal totalsynthesis of (-)-methylenolactocin and (-)-protolichesterinic acid is described, which are important because of their
Enantioselective Synthesis of (−)-Roccellaric Acid
作者:Claudius Böhm、Oliver Reiser
DOI:10.1021/ol015686u
日期:2001.5.1
[reaction in text] A new strategy for the synthesis of anti-4,5-disubstituted gamma-butyrolactones starting from inexpensive furan-2-carboxylic methyl ester was developed. By applying this methodology, the enantioselective synthesis of (-)-roccellaric acid ((-)-17) was accomplished using a copper(I)-catalyzed asymmetric cyclopropanation, a tin(IV)-catalyzed retroaldol/lactonization sequence of cyclopropanols