Recycling the <i>tert</i>-Butanesulfinyl Group in the Synthesis of Amines Using <i>tert</i>-Butanesulfinamide
作者:Masakazu Wakayama、Jonathan A. Ellman
DOI:10.1021/jo9001883
日期:2009.4.3
analytically pure tert-butanesulfinamide in 97% yield. Alternatively, the tert-butanesulfinyl chloride solution can be treated with ethanol and catalytic quinidine as a sulfinyl transfer catalyst to provide a cyclopentyl methyl ether solution of ethyl tert-butanesulfinate with 88% ee. Addition of NaNH2 in ammonia followed by simple trituration of the product with octane provides tert-butanesulfinamide with 99%
用于再循环的实际过程叔时的脱保护-butanesulfinyl组ñ -叔-butanesulfinyl胺已经实现。的治疗ñ -叔-butanesulfinyl胺用HCl的环戊基甲基醚导致完全转化为叔-butanesulfinyl氯化物和相应的盐酸胺盐,将其通过过滤分析纯的形式和以定量产率分离。然后用氨水处理所得的亚磺酰氯溶液,以97%的产率提供分析纯的叔丁烷亚磺酰胺。或者,叔叔-丁烷亚磺酰氯溶液可以用乙醇和催化的奎尼丁作为亚磺酰基转移催化剂处理,以提供具有88%ee的叔丁烷亚磺酸乙酯的环戊基甲基醚溶液。NaNH的另外2中氨随后用辛烷提供了产品的简单研磨叔-butanesulfinamide用99%ee值和在67%的基于所述起始总分离产ñ -叔-butanesulfinyl胺。