作者:Bing-Lin Wang、Zhong-Xing Jiang、Zheng-Wei You、Feng-Ling Qing
DOI:10.1016/j.tet.2007.10.019
日期:2007.12
Trifluoromethylated analogs of macrosphelide A I and 2 were designed and synthesized. The key segment 6 was efficiently constructed via a series of high stereoselective transformations from trifluoromethylated diol 8. Methoxymethylation of compound 9 with 14 1.0 equiv of sodium hydride gave optically pure compound 23a in 73% yield. From 23a a novel route was developed to prepare key segment 7. The condensation and macrolactonization were smoothly proceeded under our modified Keck's protocol. (c) 2007 Elsevier Ltd. All rights reserved.