Transformation of a 1‐Zirconacyclopent‐3‐yne, a Five‐Membered Cycloalkyne, into a 1‐Zirconacyclopent‐3‐ene and Formal “1‐Zirconacyclopenta‐2,3‐dienes” | Zendy

Suzuki Noriyuki | Zendy; Hashizume Daisuke | Zendy; Koshino Hiroyuki | Zendy; Chihara Teiji | Zendy

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Transformation of a 1‐Zirconacyclopent‐3‐yne, a Five‐Membered Cycloalkyne, into a 1‐Zirconacyclopent‐3‐ene and Formal “1‐Zirconacyclopenta‐2,3‐dienes”

Author(s) -

Suzuki Noriyuki,

Hashizume Daisuke,

Koshino Hiroyuki,

Chihara Teiji

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.200800739

Subject(s) - ene reaction , allene , protonation , alkene , alkyne , chemistry , enyne , transformation (genetics) , stereochemistry , alkylation , medicinal chemistry , organic chemistry , catalysis , ion , biochemistry , gene

Alkyne, alkene, and “allene”? A stable five‐membered metallacycloalkyne 1 with alkylidene moieties was treated with an alkali metal to give a dianionic species 2 , which was transformed into a 1‐zirconacyclopent‐3‐ene complex by protonation. The alkylation of 2 afforded zirconocene–η 4 ‐1,3‐enyne complexes 3 , which can be regarded as formal “1‐zirconacyclopenta‐2,3‐dienes”. Ar=4‐EtC 6 H 4 ; R=Me, Me 3 Sn.

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