Synthesis of highly functionalized 2-thiaspiro[4.5]deca-6,8-dienes via atom efficient tandem Michael addition/Thorpe–Ziegler cyclization†
Abstract
The two-component reaction of 2,4-bis((Z)-arylidene)dihydrothiophen-3(2H)-ones and 2-(1-arylethylidene)malononitriles proceeded through a tandem chemoselective Michael addition–tautomerization–Thorpe–Ziegler cyclization sequence of reactions in a single step affording novel 2-thiaspiro[4.5]deca-6,8-dienes in quantitative yields.