关键字：ABA BLOCK; ONE-STEP; EPOXIDES; ANHYDRIDE; MIXTURES; LACTIDE; ROUTE; CO2
摘要：Chemoselective polymerization from mixtures of monomers to control the polymer sequence is a challenging task. In this contribution, we describe a unique chemoselective polymerization affording predictable (co)polymer compositions from a mixture of monomers. The use of a one-component phosphonium borane Lewis pair and a mixture of l-lactide (l-LA), cyclohexene oxide (CHO) and CO2 enables the selective synthesis of either a polyester, polycarbonate or poly(carbonate-b-ester). The selectivity depends on the nature of the borane-oxygen functionality at the growing polymer chain end, and can be controlled by the addition of CO2 as an exogeneous switch reagent.
卷号：15
期号：24
是否译文：否