Preparation of Homoallylic Homopropargylic Alcohols from 2-Vinyloxiranes
摘要:
beta, gamma-Unsaturated aldehydes generated in situ by treatment of 2-vinyloxiranes with a catalytic amount of Sc(OTf)3 or (BFOEt2)-O-. are effectively trapped by B-allenyl-9-BBN to afford homoallylic homopropargylic alcohols in high yield. An enantioselective version has been demonstrated, and a convenient synthesis of 9-allenyl-9-BBN is described.
Preparation of Homoallylic Homopropargylic Alcohols from 2-Vinyloxiranes
摘要:
beta, gamma-Unsaturated aldehydes generated in situ by treatment of 2-vinyloxiranes with a catalytic amount of Sc(OTf)3 or (BFOEt2)-O-. are effectively trapped by B-allenyl-9-BBN to afford homoallylic homopropargylic alcohols in high yield. An enantioselective version has been demonstrated, and a convenient synthesis of 9-allenyl-9-BBN is described.
Suzuki–Miyaura Cross Coupling Reactions of B-Allenyl-9-BBN
作者:Karin Radkowski、Günter Seidel、Alois Fürstner
DOI:10.1246/cl.2011.950
日期:2011.9.5
Despite the tremendously wide scope of the palladium-catalyzedSuzuki–Miyauracrosscoupling, boron-based allenylation reactions of aryl halides are virtually unknown. It is now demonstrated that t...
Preparation of Homoallylic Homopropargylic Alcohols from 2-Vinyloxiranes
作者:Matthew L. Maddess、Mark Lautens
DOI:10.1021/ol051326l
日期:2005.8.1
beta, gamma-Unsaturated aldehydes generated in situ by treatment of 2-vinyloxiranes with a catalytic amount of Sc(OTf)3 or (BFOEt2)-O-. are effectively trapped by B-allenyl-9-BBN to afford homoallylic homopropargylic alcohols in high yield. An enantioselective version has been demonstrated, and a convenient synthesis of 9-allenyl-9-BBN is described.