Journal of organometallic chemistry

Fulvene having substituents only on 1-, 4-, and 6-positions: a key intermediate for novel ansa-metallocene complexes

YC Won, HY Kwon, BY Lee, YW Park

Index: Won, Young Chul; Kwon, Heon Yong; Lee, Bun Yeoul; Park, Young-Whan Journal of Organometallic Chemistry, 2003 , vol. 677, # 1-2 p. 133 - 139

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Citation Number: 18

Abstract

A synthetic route for 1, 4-dimethyl-6-phenylfulvene (4) and 1, 4-dimethyl-6, 6- diphenylfulvene (5), which are characteristic in that they have substituents only on 1-, 4-, and 6-positions, is developed. The synthetic route is straightforward from 2-bromo-3-methyl-2- cyclopenten-1-one ethylene ketal (1), which can be easily synthesized in 100-g scale. Overall yield from 1 is 50 and 47% for 4 and 5, respectively. Synthesis of an ansa- ...