α,α-Difluoro-α-(trimethylsilyl)acetamides as Versatile Reagents for the Preparation of Difluorinated Aldol and Mannich Adducts
作者:Aurélien Honraedt、Arie Van Der Lee、Jean-Marc Campagne、Eric Leclerc
DOI:10.1002/adsc.201700371
日期:2017.8.17
The very efficient addition of α,α‐difluoro‐α‐(trimethylsilyl)acetamides to aldehydes, ketones and N‐(tert‐butanesulfinyl)imines is described. The reaction is promoted by a catalytic amount of tetra‐n‐butylammonium diphenyltrifluorosilicate (TBAT) and high yields, as well as very high stereoselectivities in the case of N‐(tert‐butanesulfinyl)imines, are achieved. The synthetic potential of this method
描述了非常有效地将α,α-二氟-α-(三甲基甲硅烷基)乙酰胺添加到醛,酮和N-(叔丁烷亚磺酰基)亚胺中。催化量的四苯基三氟硅酸四正丁基铵(TBAT)促进了反应,并获得了高收率,并且在N-(叔丁烷亚磺酰基)亚胺的情况下实现了很高的立体选择性。通过添加各种格氏试剂或还原酰胺部分,将所得产物转化为β-羟基酮,二醇和β-氨基醇,说明了该方法的合成潜力。