Stereoselective Ring??Opening Polymerization of a Racemic Lactide by Using Achiral Salen–and Homosalen–Aluminum Complexes

N Nomura, R Ishii, Y Yamamoto…

Index: Nomura, Nobuyoshi; Ishii, Ryohei; Yamamoto, Yoshihiko; Kondo, Tadao Chemistry - A European Journal, 2007 , vol. 13, # 16 p. 4433 - 4451

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Citation Number: 264

Abstract

Abstract Highly isotactic polylactide or poly (lactic acid) is synthesized in a ring-opening polymerization (ROP) of racemic lactide with achiral salen–and homosalen–aluminum complexes (salenH 2= N, N′-bis (salicylidene) ethylene-1, 2-diamine; homosalenH 2= N, N′-bis (salicylidene) trimethylene-1, 3-diamine). A systematic exploration of ligands demonstrates the importance of the steric influence of the Schiff base moiety on the ...