We describe alternative access to prostacyclin analogues by means of two Ï-side chain addition strategies: Grignard reagent addition to an α,β-unsaturated Weinreb amide, followed by diastereoselective reduction of the corresponding enone system, and implementation of Seebach's alkylation chemistry. These strategies have led to the syntheses of biologically active prostacyclin analogues isocarbacyclin and 15R-16-(m-tolyl)-17,18,19,20-tetranorisocarbacyclin (15R-TIC), with modest to excellent diastereoselectivity.
我们描述了通过两种ω侧链添加策略获得
前列腺素类类似物的替代途径:将
格氏试剂添加到α,β-不饱和韦纳布酰胺中,然后对相应的酮系统进行立体选择性还原,并实施Seebach的烷基化
化学。这些策略已经导致
生物活性
前列腺素类类似物异羧基
前列腺素和15R-16-(m-甲基苯基)-17,18,19,20-四
氟异羧基
前列腺素(15R-TIC)的合成,具有适度到优秀的立体选择性。