110362-31-7Relevant academic research and scientific papers
AN EASY SYNTHESIS OF THE 2-PHENYLSULFONYL-SUBSTITUTED ALLYLIC BROMIDES AND ACETATES AND THEIR REACTIVITY TOWARDS NUCLEOPHILES
Auvray, P.,Knochel, P.,Normant, J. F.
, p. 5095 - 5098 (1986)
The reaction of phenyl vinyl sulfone with various aldehydes in the presence of a catalytic amount of DABCO furnishes in good yields the corresponding 2-phenylsulfonyl-substituted alcohols 5a-5e which can be easily converted into their acetates 2a-2b or into their allylically rearranged bromides 3a-3d.These reagents, in turn, react with nucleophiles (ketone enolates and cuprates) with an allylic rearrangement (SN2' mechanism) to give the functionalized unsaturated sulfones 6a-g and 7a-g.A palladium catalyzed reaction allows a stereo-controlled transformation of the sulfone 6b into the (Z,Z) skipped 1,4-diene 8.
PREPARATION AND NUCLEOPHILIC SUBSTITUTION OF (E)-1-BROMO-2-PHENYLSULFONYL-2-ALKENES AND 3-ACETOXY-2-PHENYLSULFONYL-1-ALKENES
Auvray, P.,Knochel, P.,Normant, J. F.
, p. 6095 - 6106 (2007/10/02)
Vinylphenylsulfone reacts with aldehydes to yield sulfonylated secondary allylic alcohols wich are converted to either primary allylic bromides, or secondary allylic acetates.Both react highly regioselectively with lithium cyanocuprates, or enolates.
