Bis-alkylation of dimetallated phenylsulfonylmethyl triflone. A n+1 annulation strategy for synthesis of cyclic vinyl sulfones.
摘要:
Bis-metallation of phenylsulfonylmethyl triflone 4b produces a geminal dianion which can be dialkylated to afford alpha-phenylsulfonyl triflones. Treatment of these compounds with DBU affords vinyl sulfones which can be isomerized to allyl sulfones.
A mild and convenient synthesis of functionalized methyl triflones and vinyl triflones
作者:Anu Mahadevan、P.L. Fuchs
DOI:10.1016/0040-4039(94)88065-4
日期:1994.8
A general route for the synthesis of methyl triflone derivatives utilizing triflic anhydride is described. Stereoselective synthesis of E-vinyl and dienyl triflones has been accomplished by the Peterson olefination reaction of α-silyl triflone anions.