S<sub>N</sub>2 Ring Opening of β-Lactones: An Alternative to Catalytic Asymmetric Conjugate Additions
作者:Scott G. Nelson、Zhonghui Wan、Magdalena A. Stan
DOI:10.1021/jo025519n
日期:2002.7.1
Merging catalyticasymmetricacylhalide-aldehydecyclocondensation (AAC) reactions with ensuing Grignard-mediated ring opening of the derived enantiomerically enriched beta-lactones is presented as a generally useful asymmetric synthesis of beta-disubstituted carboxylic acids. Enantiomerically enriched beta-lactones are subject to efficient S(N)2 ring opening with a variety of copper-modified alkyl
Syntheses and Biological Evaluation of Iriomoteolide 3a and Analogues
作者:Riccardo Cribiú、Corinna Jäger、Cristina Nevado
DOI:10.1002/anie.200903379
日期:2009.11.2
(RCM) approach has led to the stereocontrolled synthesis of iriomoteolide 3a, a smaller but equally cytotoxic congener of amphidinolides. Chemical editing of the molecule has provided non‐natural analogues which have comparable anticancer activity to that of the natural product, thereby allowing the iriomoteolides to be used as probe molecules in chemical biology.