Magnesium Halide-Catalyzed Anti-Aldol Reactions of Chiral <i>N</i>-Acylthiazolidinethiones
作者:David A. Evans、C. Wade Downey、Jared T. Shaw、Jason S. Tedrow
DOI:10.1021/ol025553o
日期:2002.4.1
[reaction: see text] Diastereoselective direct aldol reactions of chiral N-acylthiazolidinethiones occur in high yield with preference for the illustrated anti diastereomer. This reaction is catalyzed by 10% MgBr2.OEt2 in the presence of triethylamine and chlorotrimethylsilane. Yields range from 56 to 93% with diastereoselectivity up to 19:1 for a variety of N-acylthiazolidinethiones and unsaturated
Synthesis and Cytotoxicity Evaluation of C4- and C5-Modified Analogues of the α,β-Unsaturated Lactone of Pironetin
作者:David S. Huang、Henry L. Wong、Gunda I. Georg
DOI:10.1002/cmdc.201700084
日期:2017.4.6
addition into the natural product's α,β-unsaturatedlactone. Although pironetin's α,β-unsaturatedlactone is involved in its binding to tubulin, the structure-activity relationship at different positions of the lactone have not been thoroughly evaluated. For a systematic evaluation of the structure-activity relationships at the C4 and C5 positions of the α,β-unsaturatedlactone of pironetin, twelve analogues