One-Pot Sulfoxide Synthesis Exploiting a Sulfinyl-Dication Equivalent Generated from a DABSO/Trimethylsilyl Chloride Sequence
作者:Danny C. Lenstra、Vincent Vedovato、Emmanuel Ferrer Flegeau、Jonathan Maydom、Michael C. Willis
DOI:10.1021/acs.orglett.6b00712
日期:2016.5.6
sulfinate intermediate. In situ conversion of the sulfinate to a sulfinate silyl ester, using TMS-Cl (trimethylsilylchloride), generates a second electrophile, allowing addition of a second organometallic reagent. Organolithium or Grignard reagents can be employed, delivering sulfoxides in good to excellent yields.
Both theoretical and experimental studies demonstrated that the pi-facial stereoselection of the electrophilic addition reactions to vinylic sulfoxides is ascribed to a transition-state model in which the lone pair and the oxygen atom are oriented at the anti and inside positions, respectively, to the incipient bond.