UCD

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Authors

Byrne, LA; Furlong, PJ; Gilheany, DG; ;

Year

2004

Month

April

Journal

Synthetic Communications

Title

Easy access to medium rings by entropy/strain reduction. Part 5. A simple and mild route to cyclohepta-1,3-dienes

Status

Published

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Volume

Issue

Start Page

1631

End Page

1643

Abstract

The Perkin ring closure reaction of various substituted open chain cis,cis hexa-2,4-diene-1,6-dibromides with either bis(phenylsulfonyl)methane or dimethyl malonate under basic conditions gives reasonable yields of cycloheptadienes (1-7). The presence of unsaturation in the starting material ameliorates the entropy and strain problems normally encountered in such medium rings closures..

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