Synthesis of Functionalized Pyrrolines via Microwave-Promoted Iminyl Radical Cyclizations
作者:Jatinder Singh、Garrison A. Nickel、Yu Cai、Dakota D. Jones、Tanner J. Nelson、Jeshurun E. Small、Steven L. Castle
DOI:10.1021/acs.orglett.1c01148
日期:2021.5.21
O-Phenyloximes tethered to alkenes undergo 5-exo-trig iminyl radical cyclizations upon microwave irradiation. Trapping of the resulting cyclic radicals results in C–C, C–N, C–O, C–S, or C–X bond formation. Allylic sulfides undergo a tandem cyclization–thiyl radical β-elimination, affording terminal alkenes. The cyclizations exhibit a broad scope, and in some cases they are highly diastereoselective
束缚于烯烃的O-苯基肟在微波辐射下经历5- exo - trig亚氨基自由基环化。捕集所产生的环状自由基会导致C–C,C–N,C–O,C–S或C–X键的形成。烯丙基硫化物进行串联环化-噻吩基β-消除,提供末端烯烃。环化作用范围广,在某些情况下,它们具有非对映选择性。吡咯啉加合物是通用的中间体,可以转化为多种不同的物种。