Concerning the relative importance of enantiomorphic site vs. chain end control in the stereoselective polymerization of lactides: reactions of (R,R-salen)- and (S,S-salen)-aluminium alkoxides LAlOCH2R complexes (R = CH3 and S-CHMeCl).
The preparations and structures of LAlOCH(2)C(S)HMeCl, where L = (R,R) or (S,S)-N,N'-bis(3,5-di-tert-butyl-salicylidene)-1,2-cyclohexenediamino, are reported together with the respective LAlOEt compounds, and their reactivities toward L- and rac-lactides in various solvents reveal the surprising complexity of the stereopreference for the ring-opening event.
Chisholm
Malcolm H
MH
Department of Chemistry, The Ohio State University, 100 W 18th Ave., Columbus, Ohio 43210, USA. chisholm@chemistry.ohio-state.edu
Patmore
Nathan J
NJ
Zhou
Zhiping
Z
D000535:Aluminum / Q000737:chemistry; D009942:Organometallic Compounds / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry; D011091:Polyesters / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry; D013237:Stereoisomerism
D009942:Organometallic Compounds; D010087:Oxides; D011091:Polyesters; D012997:Solvents; C033616:poly(lactide); D000535:Aluminum