An efficient and selective multicomponent oxidative coupling of two different aliphaticprimaryamines into thioamides by elemental sulfur under solvent-free conditions has been developed.
Microwave-assisted synthesis of 2-substituted 4,5,6,7-tetrahydro-1,3-thiazepines from 4-aminobutanol
作者:María C Mollo、Natalia B Kilimciler、Juan A Bisceglia、Liliana R Orelli
DOI:10.3762/bjoc.16.5
日期:——
A general procedure for the synthesis of 2-substituted tetrahydro-1,3-thiazepines by MW-assisted cyclization of 4-thioamidobutanols is presented. The acyclic precursors were prepared in high overall yields by an expeditious three-step diacylation/thionation/deprotection sequence from 4-aminobutanol. Microwave-assisted ring closure of 4-thioamido alcohols promoted by trimethylsilyl polyphosphate (PPSE)