Convenient Access to Functionalized Vinylcyclopentenols from Alkynyloxiranes
摘要:
beta,gamma-Alkynyl aldehydes, generated in situ by treatment of alkynyloxiranes with a catalytic amount of Sc(OTf)(3) or BF3 center dot OEt2, are effectively trapped by a variety of allyl nucleophiles to afford homopropargylic homoallylic alcohols in good yield and selectivity. Such products are used as substrates for the synthesis of functionalized vinylcyclopentenols via enyne metathesis.
Convenient Access to Functionalized Vinylcyclopentenols from Alkynyloxiranes
摘要:
beta,gamma-Alkynyl aldehydes, generated in situ by treatment of alkynyloxiranes with a catalytic amount of Sc(OTf)(3) or BF3 center dot OEt2, are effectively trapped by a variety of allyl nucleophiles to afford homopropargylic homoallylic alcohols in good yield and selectivity. Such products are used as substrates for the synthesis of functionalized vinylcyclopentenols via enyne metathesis.
Convenient Access to Functionalized Vinylcyclopentenols from Alkynyloxiranes
作者:Letian Wang、Matthew L. Maddess、Mark Lautens
DOI:10.1021/jo062107w
日期:2007.3.1
beta,gamma-Alkynyl aldehydes, generated in situ by treatment of alkynyloxiranes with a catalytic amount of Sc(OTf)(3) or BF3 center dot OEt2, are effectively trapped by a variety of allyl nucleophiles to afford homopropargylic homoallylic alcohols in good yield and selectivity. Such products are used as substrates for the synthesis of functionalized vinylcyclopentenols via enyne metathesis.