Stereoselective preparation of Z-trisubstituted alkylidene cyclic carbonates via palladium-catalyzed carboncarbon bond formation
作者:Patrick Toullec、Aranzazu Carbayo Martin、Monica Gio-Batta、Christian Bruneau、Pierre H Dixneuf
DOI:10.1016/s0040-4039(00)00889-3
日期:2000.7
Alkylidene cyclic carbonates bearing a Z-trisubstituted exocyclic double bond have been stereoselectively prepared in good yields for the first time from methylene cyclic carbonates, resistant to the classical Heck reaction, on treatment with aryl iodides, CF3CO2Ag and palladium catalyst, under conditions which tolerate (sp(2))C-Br bonds. (C) 2000 Elsevier Science Ltd. All rights reserved.
CO<sub>2</sub>-Sourced α-Alkylidene Cyclic Carbonates: A Step Forward in the Quest for Functional Regioregular Poly(urethane)s and Poly(carbonate)s
Described is a robust platform for the synthesis of a large diversity of novel functional CO2-sourced polymers by exploiting the regiocontrolled ring-opening of α-alkylidene carbonates by various nucleophiles. The reactivity of α-alkylidene carbonates is dictated by the exocyclic olefinic group. The polyaddition of CO2-sourced bis(α-alkylidene carbonate)s (bis-αCCs) with primary and secondary diamines