Sulfinamides as Highly Effective Amine Protecting Groups and Their Use in the Conversion of Amino Alcohols into Morpholines
作者:Sven P. Fritz、Amara Mumtaz、Muhammad Yar、Eoghan M. McGarrigle、Varinder K. Aggarwal
DOI:10.1002/ejoc.201100337
日期:2011.6
1,2-Amino alcohols have been converted into morpholines by using sulfinamides as temporary protecting/activating groups on the amine. We have developed a procedure for the selective synthesis of monoprotected N-sulfinyl amino alcohols through a double sulfinylation/hydrolysis strategy. Following the reaction of the sulfinamides with bromoethyldiphenylsulfonium triflate, protected morpholines were obtained
通过使用亚磺酰胺作为胺上的临时保护/活化基团,已将 1,2-氨基醇转化为吗啉。我们开发了一种通过双亚磺酰化/水解策略选择性合成单保护 N-亚磺酰氨基醇的程序。在亚磺酰胺与溴乙基二苯基锍三氟甲磺酸盐反应后,以高产率获得了受保护的吗啉。随后用 HCl 处理释放出吗啉盐酸盐。这种高产和有效方法的有用性已在抗抑郁药物 (S,S)-瑞波西汀的正式合成中得到证明。