A new preparation method for a variety of stable sulfur ylides is described. Reactions of the Corey-Kim reagent with active methylene compounds having two electron withdrawing groups in the presence of triethylamine afforded stable surfur ylides in satisfactory yields.
Rhodium-Catalyzed Synthesis of Sulfur Ylides via in Situ Generated Iodonium Ylides
作者:Janakiram Vaitla、Kathrin H. Hopmann、Annette Bayer
DOI:10.1021/acs.orglett.7b03413
日期:2017.12.15
the synthesis of sulfur ylides via rhodium-catalyzed coupling of in situ generated iodonium ylides with sulfides or sulfoxides has been developed. A wide range of sulfur ylides were obtained in moderate to good yields from inexpensive sulfur compounds and active methylene compounds with a short reaction time (MW, 5–10 min) or 12–16 h at rt. Furthermore, these sulfoxonium ylides were used as novel acceptor/acceptor
Carbonyl-stabilizedsulfoniumylides readily react with elemental sulfur and selenium to afford 1,3-oxathiole and 1,3-oxaselenole derivatives, respectively, in good yields, thus providing a simple method for constructing these ring systems which uses easily accessible compounds as starting materials.
Reactions of carbonyl-stabilized sulphonium ylides with grignard reagents
作者:H. Nozaki、K. Nakamura、M. Takaku
DOI:10.1016/s0040-4020(01)82900-8
日期:——
Sulphonium diacylmethylides RR′-;(COR′)2 react with R′'‴MgX to afford ketones R′COR′'′, if either R′' or R′'′ has an α-hydrogen. In the absence of this, for example, the reaction of R(Me)(COPh)2 with PhMgBr results in elimination of the S-;Me and gives a product RSC(COPh2. If R, R′, R′' and R‴ are all Ph groups, benzophenone and Ph2HCOPh are formed. The reaction of phenacylides R(Me)HCOPh with
Direct and Efficient Synthesis of Sulfonium Acyl Sulfonylmethylide Ylides from Acetylenic Sulfones and Dimethyl Sulfoxide
作者:Jiaxi Xu、Duo Fu、Jiayi Wang
DOI:10.1055/a-1541-6271
日期:2021.11
sulfonium ylides – sulfonium acyl sulfonylmethylides – were directly and efficiently prepared from various acetylenic sulfones and aliphatic sulfoxides under heating conditions. The current method features short reaction time, low cost, readily available starting materials, convenient operation, and purification, providing an efficient access to widely applied bifunctionalized sulfonium ylides.