Palladium(II)-Catalyzed Enantioselective Synthesis of α-(Trifluoromethyl)arylmethylamines
作者:Thomas Johnson、Bo Luo、Mark Lautens
DOI:10.1021/acs.joc.6b00657
日期:2016.6.17
We describe a method for the synthesis of α-(trifluoromethyl)arylmethylamines that consists of the palladium(II)-catalyzed addition of arylboroxines to imines derived from trifluoroacetaldehyde. Palladium acetate is used as a catalyst with electron-neutral or electron-rich arylboroxines, and it was found that addition of an ammonium or silver salt was crucial to promote the reaction of electron-poor
我们描述了一种合成α-(三氟甲基)芳基甲胺的方法,该方法由钯(II)催化将芳基硼氧烷加成到衍生自三氟乙醛的亚胺上。乙酸钯用作具有电子中性或电子富集的芳基硼氧烷的催化剂,并且发现添加铵盐或银盐对于促进贫电子的硼氧烷的反应至关重要。以(S)-t -Bu-PyOX为手性配体,该方法以57-91%的产率提供了多种α-三氟甲基化胺,在大多数情况下,ee大于92%。