HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Yttrium phosphasalen initiators for rac-lactide polymerization: Excellent rates and high iso-selectivities

Abstract : Highly active yttrium phosphasalen initiators for the stereocontrolled ring-opening polymerization of rac-lactide are reported. The initiators are coordinated by a new class of ancillary ligand: an iminophosphorane derivative of the popular "salen" ligand, termed "phosphasalen". Changing the phosphasalen structure enables access to high iso-selectivities (Pi = 0.84) or hetero-selectivities (Ps = 0.87). The initiators also show very high rates, excellent polymerization control, and tolerance to low loadings; furthermore, no chiral auxiliaries/ligands are needed for the stereocontrol. The combination of such high rates with high iso-selectivities is very unusual.
Document type :
Journal articles
Complete list of metadata

https://hal-polytechnique.archives-ouvertes.fr/hal-00906007
Contributor : Francoise Girard Connect in order to contact the contributor
Submitted on : Tuesday, November 19, 2013 - 10:13:31 AM
Last modification on : Friday, February 4, 2022 - 9:02:01 AM

Identifiers

Collections

Citation

Clare Blakewell, Thi-Phuong-Anh Cao, Nicholas Long, X. Le Goff, Audrey Auffrant, et al.. Yttrium phosphasalen initiators for rac-lactide polymerization: Excellent rates and high iso-selectivities. Journal of the American Chemical Society, American Chemical Society, 2012, 134 (51), pp.20577-20580. ⟨10.1021/ja310003v⟩. ⟨hal-00906007⟩

Share

Metrics

Record views

216