Isoprene Polymerization with Yttrium Amidinate Catalysts: Switching the Regio‐ and Stereoselectivity by Addition of AlMe 3 | Zendy

Zhang Lixin | Zendy; Nishiura Masayoshi | Zendy; Yuki Masahiro | Zendy; Luo Yi | Zendy; Hou Zhaomin | Zendy

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Isoprene Polymerization with Yttrium Amidinate Catalysts: Switching the Regio‐ and Stereoselectivity by Addition of AlMe 3

Author(s) -

Zhang Lixin,

Nishiura Masayoshi,

Yuki Masahiro,

Luo Yi,

Hou Zhaomin

Publication year - 2008

Publication title -

angewandte chemie international edition

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.831

H-Index - 550

eISSN - 1521-3773

pISSN - 1433-7851

DOI - 10.1002/anie.200705120

Subject(s) - isoprene , stereoselectivity , yttrium , polymerization , catalysis , chemistry , selectivity , aluminium , organic chemistry , copolymer , polymer , oxide

Aluminum switches : The addition of AlMe 3 to the isoprene polymerization catalyst 1 /[Ph 3 C][B(C 6 F 5 ) 4 ] switches the regio‐ and stereoselectivity from 3,4‐isospecific to 1,4‐ cis selective (see scheme). A heterotrinuclear Y/Al complex obtained from the reaction of 1 with AlMe 3 shows 1,4‐ cis selectivity under similar conditions in the presence of [Ph 3 C][B(C 6 F 5 ) 4 ]. PI=polyisoprene.

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