1,4-Dithiane-2,5-diol as an efficient synthon for a straightforward synthesis of functionalized tetrahydrothiophenes via sulfa-Michael/aldol-type reactions with electrophilic alkenes
作者:Nikla Baricordi、Simonetta Benetti、Valerio Bertolasi、Carmela De Risi、Gian P. Pollini、Francesco Zamberlan、Vinicio Zanirato
DOI:10.1016/j.tet.2011.10.064
日期:2012.1
‘One-pot’ tandem reactions of commercially available 1,4-dithiane-2,5-diol (the dimer of mercaptoacetaldehyde) with electrophilic alkenes resulted in the facile formation of substituted tetrahydrothiophene derivatives. Thus, sulfa-Michael/Henry and sulfa-Michael/aldol sequences provided polysubstituted tetrahydrothiophenes using in situ generated nitroalkenes and α,β-unsaturated carbonyl compounds
市售的1,4-二噻吩-2,5-二醇(巯基乙醛的二聚体)与亲电烯烃的“一锅”串联反应可轻松形成取代的四氢噻吩衍生物。因此,sulfa-Michael / Henry和sulfa-Michael / aldol序列分别使用原位生成的硝基烯烃和α,β-不饱和羰基化合物作为巯基乙醛二聚体的亲电子配体提供了多取代的四氢噻吩。