Easy access to trans-2,3-disubstituted cyclobutanones, 2,4,5-trisubstituted 3,6-dihydro-2H-pyrans and cis-substituted phenylcyclopropylsulfones by using the highly versatile 1-phenylsulfenyl- or 1-phenylsulfonyl-cyclopropylketones
The high versatility of 1-phenylsulfenyl- or 1-phenylsulfonyl- cyclopropylketones has been exploited for the regioselective synthesis of trans-2,3-disubstituted cyclobutanones, 2,4,5-trisubstituted 3,6-dihydro-2H-pyrans and cis-2-alkyl- or cis-2-aryl-cycl
Alberti, Guido,Bernard, Angela M.,Floris, Costantino,Frongia, Angelo,Piras, Pier P.,Secci, Francesco,Spiga, Marco
scheme or table
p. 3512 - 3519
(2010/01/05)
Phase transfer catalyzed cyclopropanation of trans-styryl aryl sulfones with dimethyl sulfoxonium methylide
Some new trans-aryl cyclopropyl sulfones (II) have been prepared by the cycloaddition of dimethylsulfoxonium methylide to trans-styryl aryl sulfones (I) by two different methods. It is observed that the reaction in presence of a phase transfer catalyst proceeds in a facile manner.
PHASE TRANSFER CATALYZED CYCLOPROPANATION OF 4-METHYLSTYRENE WITH CARBENES AND YLIDES
The cyclopropanation of 4-methylstyrene with arylthiocarbenes and dimethylsulfonium phenacylides under phase transfer conditions affords a convienient method for the preparation of isomeric 1-(4-methylphenyl)-2-arylsulfonyl/aroyl cyclopropanes (IV,VI).
Reddy, D.B.,Reddy, T.V.,Reddy, P.V.,Reddy, M.M.
p. 849 - 854
(2007/10/02)
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