Kaoru Onuma, Katsunori Suzuki, M. Yamashita
Feb 23, 2015
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Journal
Organic letters
Abstract
The synthesis of a donor-acceptor cyclobutadiene featuring a boryl/amino-substitution pattern is presented together with its characteristic reactivity toward water. On the basis of the results of X-ray crystallography, theoretical studies, and spectroscopic analyses, the observed rhombic structure of the cyclobutadiene was attributed to a charge-separated electronic structure. Reaction of this boryl-substituted cyclobutadiene with water induced a characteristic migration of the boryl group, due to the Lewis acidity of the boryl-substituent.