Synthesis of stereoregular poly(2S,3S)‐benzyl β‐3‐methylmalate

摘要

AbstractThe asymmetric lactone (3S, 4R)‐3‐methyl‐4‐benzyloxycarbonyl‐2‐oxetanone (6) was anionically polymerized to give an insoluble, crystalline, highly isotactic polymer with (2S, 3S)‐benzyl β‐3‐methylmalate repeating units. Solubility was achieved by copolymerization of6with the recemic (R,S)‐butyl malolactonate (7). The semicrystalline copolymer was characterized (M̄n= 107 000,Tg= 29,6°C,Tm= 161°C, α = 1,5 deg · dm−1· g−1· cm3) and its stereo