Total synthesis and biological evaluation of (+)-kalkitoxin, a cytotoxic metabolite of the cyanobacterium Lyngbya majusculaElectronic supplementary information (ESI) available: 1H NMR spectrum of synthetic (+)-kalkitoxin in C6D6. See http://www.rsc.org/suppdata/ob/b4/b404205k/
作者:James D. White、Qing Xu、Chang-Sun Lee、Frederick A. Valeriote
DOI:10.1039/b404205k
日期:——
+-Kalkitoxin, a metabolite of the marine cyanobacteriumLyngbyamajuscula, was synthesized from (R)-2-methylbutyric acid, (R)-cysteine, and (3S, 4S, 6S)-3,4,6-trimethyl-8-(methylamino)octanoic acid. A key step in the synthesis was installation of the anti,anti methyl stereotriad by means of a tandem asymmetric conjugate addition of an organocopper species to an alpha,beta-unsaturated N-acyl oxazolidin-2-one