M. Shi, Y. Okamoto, S. Takamuku
Nov 18, 1991
Citations
0
Influential Citations
5
Citations
Journal
Tetrahedron Letters
Abstract
Abstract Upon UV-irradiation in methanol, bis(methoxyphenyl) methylphosphonates underwent an intramolecular coupling of two methoxyphenyl groups to give dimethoxybiphenyls and dimethoxy-9,10-dioxaanthracenes. The reactivities and fluorescence spectra of the phosphonates were sensitive to the position of the methoxy group. These photo-induced couplings proceed probably through the formation of the two types of singlet intramolecular excimers.