The first Doyle–Kirmse reaction on alkynyl diazoacetates using allyl/propargyl sulfides is reported. The development provides diversified 1,5-enyne and 1,4-allenyne thioaryl carboxylates in good yields under ligand-/additive-free AuCl and Rh2(OAc)4 catalysis, respectively (48 examples, up to 96% yield). The study demonstrated the dual role of allyl sulfide as a ligand and substrate. Also, we have exemplified
Asymmetric synthesis of 1-alkynylcyclopropane-1-carboxylates
作者:Huw M.L. Davies、Timothy A. Boebel
DOI:10.1016/s0040-4039(00)01453-2
日期:2000.10
Dirhodium tetrakis(S-(N-dodecylbenzenesulfonyl)prolinate)(Rh2S-DOSP4) catalyzed decomposition of methyl alkynyldiazoacetates in the presence of alkenes results in highly diastereoselective and enantioselective cyclopropanations. (C) 2000 Published by Elsevier Science Ltd.