Catalytic vinylogous cross-coupling reactions of rhenium vinylcarbenoids
作者:Ji Chen、Jimmy Wu
DOI:10.1039/c7sc05477g
日期:——
compounds by means of cross-coupling with propargyl ethers as non-obvious allylatingreagents. Data from isotope-labeling and kinetic isotopic studies are consistent with a mechanism that proceeds by vinylidene formation as the rate determining step, followed by 1,5-hydride shift to generate a key rhenium vinylcarbenoid complex. Bond formation occurs at the vinylogous site and the reaction is conveniently
Reaction of Donor-Acceptor Cyclobutanes with Indoles: A General Protocol for the Formal Total Synthesis of (±)-Strychnine and the Total Synthesis of (±)-Akuammicine
A ligand‐promoted catalytic [4+2] annulation reactionusing indole derivatives and donor‐acceptor (D‐A) cyclobutanes is reported, thus providing an efficient and atom‐economical access to versatile cyclohexa‐fused indolines with excellent levels of diastereoselectivity and a broad substrate scope. In the presence of a chiral SaBOX ligand, excellent enantioselectivity was realized with up to 94 % ee