In:
Chinese Journal of Chemistry, Wiley, Vol. 30, No. 9 ( 2012-09), p. 2176-2182
Abstract:
Reaction of sulfonylated binaphthol [2‐hydroxy‐2′‐tosyloxy‐1,1‐binaphthyl ( 1a , Ts‐Binol) or 2‐hydroxy‐2′‐(phenylsulfonyloxy)‐1,1‐binaphthyl ( 1b , Ps‐Binol)] with 1 equiv. of ZnEt 2 afforded zinc complexes [(Ts‐Binol)ZnEt] 2 ( 2a ) and [(Ps‐Binol)ZnEt] 2 ( 2b ). Further reaction of zinc complexes 2a and 2b with benzyl alcohol (BnOH) gave the zinc benzyloxide [(Ts‐Binol) 2 Zn 2 (OBn) 2 ] 2 ( 3a ) and [(Ps‐Binol) 2 Zn 2 (OBn)2] 2 ( 3b ). Alternatively, the zinc benzyloxides 3a and 3b could also be obtained by reaction of compound 1a or 1b with Zn(OBn) 2 ( in situ reaction of ZnEt 2 and BnOH). The complexes were fully characterized by elemental analyses and spectroscopic analyses, and complexes 2a , 2b and 3a were further characterized by single‐crystal X‐ray analyses. The catalytic activities of these zinc complexes towards ring‐opening polymerization of ε ‐caprolactone and D , L ‐lactide were studied.
Type of Medium:
Online Resource
ISSN:
1001-604X
,
1614-7065
DOI:
10.1002/cjoc.201200613
Language:
English
Publisher:
Wiley
Publication Date:
2012
detail.hit.zdb_id:
2144352-X
SSG:
6,25
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