Diels−Alder Additions of Benzynes within Helicene Skeletons
作者:David Zhigang Wang、Thomas J. Katz、James Golen、Arnold L. Rheingold
DOI:10.1021/jo048707h
日期:2004.10.1
Although the contortions required are unprecedented, the benzynes formed by the fluoride-induced elimination of TMSOTf from o-trimethylsilyl [6]- and [7]-helicenol triflates add to another ring of the helicenes rather than to an external furan molecule.