Ir-catalyzed asymmetric allylic alkylation using chiral diaminophosphine oxides: DIAPHOXs. Formal enantioselective synthesis of (−)-paroxetine
作者:Tetsuhiro Nemoto、Tatsurou Sakamoto、Takashi Fukuyama、Yasumasa Hamada
DOI:10.1016/j.tetlet.2007.05.120
日期:2007.7
An Ir-catalyzed asymmetric allylic alkylation using chiral diaminophosphine oxide is described. Asymmetric allylic alkylation of terminal allylic carbonates proceeded using 5 mol % of Ir catalyst, 5 mol % of DIAPHOX 1i, 10 mol % of NaPF6, 10 mol % of LiOAc, and N,O-bis(trimethylsilyl)acetamide (BSA), affording the corresponding branched products in excellent yield and in up to 95% ee. The developed
描述了使用手性二氨基膦氧化物的Ir催化的不对称烯丙基烷基化。使用5 mol%的Ir催化剂,5 mol%的DIAPHOX 1i,10 mol%的NaPF 6、10 mol%的LiOAc和N,O-双(三甲基甲硅烷基)乙酰胺(BSA)进行末端烯丙基碳酸酯的不对称烯丙基烷基化以极高的收率和高达95%的ee提供相应的分支产品。所开发的催化不对称反应已成功应用于(-)-帕罗西汀的正式对映选择性合成。