作者:K. C. Nicolaou、Qiang Kang、Sin Yee Ng、David Y.-K. Chen
DOI:10.1021/ja102927n
日期:2010.6.16
Totalsynthesis of englerin A, a recently reported sesquiterpenoid exhibiting potent and selective growth inhibition against renal cancer cell lines, has been accomplished. The successful strategy featured a [5 + 2] cycloaddition reaction to cast the seven-membered oxabicyclic key intermediate in both racemic and optically active forms. Synthetic (+/-)-englerin A, (+/-)-englerin B, (+/-)-englerin B
englerin A 是一种最近报道的对肾癌细胞系表现出有效和选择性生长抑制作用的倍半萜类化合物,已完成全合成。成功的策略以 [5 + 2] 环加成反应为特征,以外消旋和旋光形式铸造七元氧杂双环关键中间体。合成 (+/-)-englerin A、(+/-)-englerin B、(+/-)-englerin B 醋酸盐、羟基醋酸盐、叔丁基二甲基甲硅烷基醚和氢化 (+/-)-englerin A ( 31) 测试了它们对选定的一组癌细胞系的细胞毒性,结果是指向更集中的构效关系研究的路径。
Stereoselective total synthesis of polyketide lactone, (3R,4S,5S,9S)-3,5,9-trihydroxy-4-methylundecanoic acid δ-lactone
作者:Gowravaram Sabitha、Peddabuddi Gopal、Jhillu S. Yadav
DOI:10.1016/j.tetasy.2009.06.008
日期:2009.7
The total synthesis of lactone I has been described. The convergent asymmetric synthesis relies on the use of an Evans' syn-aldol, chain extension with lithio tert-butyl acetate, and the stereoselective reduction of a ketone as the key reactions. (C) 2009 Published by Elsevier Ltd.