Novel synthesis of bifurans via furan-forming photocyclization of α-diketones conjugated with ene-yne
作者:Kazuhiko Nakatani、Kazuhito Tanabe、Isao Saito
DOI:10.1016/s0040-4039(97)00018-x
日期:1997.2
Upon photoirradiation at 366 nm alpha-diketones conjugated with ene-yne undergo cyclization to furan derivatives with the formation of carbene intermediates. In protic solvents the carbene was protonated to produce furan derivatives, whereas trapping the carbene in nonprotic solvents by adjacent carbonyl group led to the formation of a novel 2,2'-bifuran derivative in a quantitative yield. (C) 1997, Elsevier Science Ltd.