Stereodefined α-iodovinyl sulfoxides bearing a sulfinyl group and an iodo group were prepared by a one-pot iodination/Horner–Wadsworth–Emmons reaction protocol. This reaction can be applied to a wide range of aldehydes, and further application was demonstrated.
Sulfur-Directed Enantioselective Synthesis of Functionalized Dihydropyrans
作者:Roberto Fernández de la Pradilla、Mariola Tortosa、Nadia Lwoff、Miguel A. del Águila、Alma Viso
DOI:10.1021/jo801029q
日期:2008.9.1
dihydropyrans. The scope of this methodology, including the preparation of seven-membered rings, has been studied in depth. The reactivity of our sulfinyl dihydropyrans toward oxidation, imination, and dihydroxylation has been explored, and thus several routes to densely functionalized pyran derivatives have been outlined. The reactivity of allylic dihydropyranyl sulfones and sulfoximines in S(N)2'
Remote Stereocontrol in the Synthesis of Acyclic 1,4-Diols and 1,4-Aminoalcohols from 2-Sulfinyl Dienes
作者:Roberto Fernández de la Pradilla、Marina Velado、Ignacio Colomer、Carmen Simal、Alma Viso、Heinz Gornitzka、Catherine Hemmert
DOI:10.1021/ol502592y
日期:2014.10.3
The highly diastereoselective conjugate addition of alcohols and amines (RXH) to enantiopure 2-sulfinyl dienes renders transient allylicsulfoxides which undergo sulfoxide–sulfenate rearrangement and sulfenate cleavage providing 2-ene-1,4-diols and 2-ene-1,4-aminoalcohols with up to 99:1 dr. The method allows for the generation of two stereocenters in a single synthetic operation with remote chirality