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