A general method for one-potsynthesis of thioamides without transition metals or external oxidants is developed through a three-component reaction involving chlorohydrocarbon, amide and elementalsulfur. Both alkyl and aryl thioamides could be obtained in moderate to excellent yields through this protocol. A high tolerance regarding various substituents on chlorohydrocarbon or amide was justified
Etude de l'induction asymetrique trans-1,3 au cours de l'halogenolactonisation des dimethylamides des acides α-methyl- ou α-benzyl alcene-4oiques ou alcene-4thioiques conduisant aux perhydrofurannones-2 et -thiophenones-2 trans-disubstituees-3,5 (les acides α,β-disubstitues conduisent aux (thio) lactones trisubstituees-3,4,5)
Etude de l'induction asymetrique trans-1,3 au cours de l'halogenolactonisation des dimethylamides des acides α-methyl-ou α-benzyl alcene-4oiques ou alcene-4thioiques conduisant aux perhydrofurannones-2 et-thiophenones-2 trans-disubstitu 3,5 (les acides α,β-disubstitues conduisent aux (thio)lactones trisubstituees-3,4,5)
Stereoselective generation of Z-ketene S,N-acetal from S-alkyl onium salt of thioamide and its application to diastereoselective α-allylation of thioamide
作者:Y. Tamaru、M. Mizutani、Y. Furukawa、O. Kitao、Z. Yoshida
DOI:10.1016/s0040-4039(00)85828-1
日期:——
Highly diastereoselective α-allylation of thioamides has been achieved via S-allylation of thioamide, dehydrohalogenation, and thio-Claisenrearrangement sequences in one pot.
reactions using a catalytic amount of tin(II) reagents have been developed. Namely, an aldol type reaction of tin(II) enolate is achieved starting from α,β-unsaturatedketone, aldehyde and ethylthiotrimethylsilane in the presence of a catalytic amount of tin(II) triflate sulfide. Furthermore, the catalyticasymmetric Michael reaction of tin(II) enethiolate is realized just by using a catalytic amount of tin(II)