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Synthesis and cycloaddition reaction of 2,3-dimethylene-7-isopropylidenebenzonorborene

✍ Scribed by Tadashi Sasaki; Takashi Manabe; Kenji Hayakawa

Publisher: Elsevier Science
Year: 1981
Tongue: French
Weight: 221 KB
Volume: 22
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(01)90525-8

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✦ Synopsis

Synthesis of 2,3-dimethylene-7-isopropylidenebenzonorbornene (2) and its cycloaddition reactions with dichloroketene and dienophiles are described. Recently, interesting stereoselectivities in cycloaddition reactions of molecules containing proximal n-bonds have been reported, and the factors controlling them have been extensively explored.'

We have already reported that 7-isopropylidenebenzonorbornadiene 1 shows remarkable

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