Direct catalytic asymmetric aldol reaction of thioamides: a concise asymmetric synthesis of (R)-fluoxetine
作者:Mitsutaka Iwata、Ryo Yazaki、Naoya Kumagai、Masakatsu Shibasaki
DOI:10.1016/j.tetasy.2010.04.034
日期:2010.7
A direct catalytic asymmetric aldol reaction of aromatic aldehydes and thioamides is described. A soft Lewis acid/hard Brønsted base cooperative catalyst comprising (R,R)-Ph-BPE/[Cu(CH3CN)4]PF6/Li(OC6H4-p-OMe) promoted the title reaction efficiently, triggered by in situ generation of the active thioamide enolate through a soft–soft interaction of Cu(I) and the thioamide. The aldol product was transformed
描述了芳族醛和硫代酰胺的直接催化不对称醛醇缩合反应。包含(R,R)-Ph-BPE / [Cu(CH 3 CN)4 ] PF 6 / Li(OC 6 H 4 - p -OMe)的软路易斯酸/硬布朗斯台德碱协同催化剂有效地促进了标题反应,通过铜(I)和硫代酰胺的软-软相互作用原位产生活性硫代酰胺烯醇而触发。将醛醇缩合产物转化为(R)-氟西汀,一种抗抑郁剂。