The present application provides, among other things, compounds and methods for metathesis reactions. In some embodiments, provided compounds promote highly efficient and highly Z-selective metathesis. In some embodiments, provided compounds and methods are particularly useful for producing allyl alcohols. In some embodiments, provided compounds have the structure of formula I. In some embodiments, provided compounds comprise ruthenium, and a ligand bonded to ruthenium through a sulfur atom.
Stay active: Allylcopperspecies can be generated in situ through catalytic intramolecular oxycupration of allenic alcohol. The allylcopper can react with various aldehydes and a ketone to give 1H‐isochromene derivatives in an enantioselective manner (see scheme; HMPA=hexamethylphosphoramide, THF=tetrahydrofuran). The protocol is atom‐economical, highly regioselective, stereoconvergent, and tolerant
Allenes and enones undergo diastereoselective reductive [3 + 2] cycloaddition to form cyclopentanols in very good yields in the presence of CoI2(dppe), zinc, zinc iodide, and water.
The Stille coupling reaction of aryl triflates with n-tributylallenyl stannane : a general route to arylallenes
The palladium-copper co-catalyzed cross-coupling reaction of n-tributylallenyl stannane 1 with aryl triflates provides an efficient route to the corresponding aryl allenes.
Badone Domenico, Cardamone Rosanna, Guzzi Umberto, Tetrahedron Lett., 35 (1994) N 30, S 5477-5480