Alkyl substituted [2.2]paracyclophane-1,9-dienes

Org Biomol Chem. 2016 Jul 7;14(25):6079-87. doi: 10.1039/c6ob00885b. Epub 2016 Jun 1.

Abstract

[2.2]Paracyclophane-1,9-dienes substituted with n-octyl chains have been synthesised from the corresponding dithia[3.3]paracyclophanes using a benzyne induced Stevens rearrangement. The use of 2-(trimethylsilyl)phenyl trifluoromethanesulfonate and tetra-n-butylammonium fluoride as the in situ benzyne source gave significantly improved yields over traditional sources of benzyne and enabled the preparation of n-octyl substituted [2.2]paracyclophane-1,9-dienes on a multi-gram scale.