2,5-[C4+C2] Ringtransformation of Pyrylium Salts with α-Sulfinylacetaldehydes
作者:Dominik Bauer、Kathrin Hofmann、Michael Reggelin
DOI:10.3390/molecules28227590
日期:——
A rapid synthesis of chiral sulfoxide-functionalized meta-terphenyl derivatives by a 2,5-[C4+C2] ringtransformation reaction of pyrylium salts with in situ generated enantiomerically pure α-sulfinylacetaldehydes is described in this paper. This synthetic method demonstrates, for the first time, the use of α-sulfinylacetaldehydes in a reaction sequence initiated by the nucleophilic attack of pyrylium
Highly Enantiomeric Purity Conversion of α-Sulfinyl Oximes and α-sulfinyl Hydrazones to the Corresponding β-keto Sulfoxides with Butyltriphenylphosphonium Periodate (BUTPPPI)
作者:A. R. Hajipour、A. E. Ruoho
DOI:10.1080/714040978
日期:2003.12.1
Butyltriphenylphosphonium periodate (Ph3P+BuIO4 −) 1 is readily prepared as a white solid from butyltriphenylphosphonium chloride, performs conversion of α-sulfinyl oximes (2) and α-sulfinyl hydrazones (4) to the corresponding β-keto sulfoxides (3) in high yields and high enantiomeric purity.
Highly stereoselective hydrocyanation of optically pure α-sulfinylaldehydes
作者:Marta M Cifuentes Garcı́a、José Luis Garcı́a Ruano、Ana M Martı́n Castro、Jesús H Rodrı́guez Ramos、Inmaculada Fernández
DOI:10.1016/s0957-4166(98)00026-3
日期:1998.3
hydrocyanation of enantiomerically pure 2-p-tolylsulfinylacetaldehyde and 2-p-tolylsulfinylpropanal with Et2AlCN catalyzed by ZnBr2 is described. The sulfur configuration controls the stereochemicalcourse of the reaction. Hydrolysis of the resulting cyanohydrins and further desulfurization yielded the corresponding α-hydroxyamides in high ees (90%).