作者:Mario Fernandez、Daniel J. Pollart、Harold W. Moore
DOI:10.1016/0040-4039(88)85203-1
日期:1988.1
was observed when I was treated with ZnCl2 in refluxing carbon tetrachloride. The bicyclooctadienones2a,b were observed to undergo retro Diels-Alder fragmentation at 138 °C to give hydroxy(or trimethylsiloxy)-phenylethynylketenes3a,b, the only examples of alkynylketenes other than alkynylcyanoketenes to appear in the literature.1 The ketene3 b cycloadds to a variety of ketenophiles, but most interestingly
5,6-二羟基-1,3-二甲氧基-5,6-二苯基乙炔基-1,3-环己二烯(1)异常重排为7-羟基-1,4-二甲氧基-2-苯基乙炔基双环[2.2.2]辛二烯当我在回流四氯化碳中用ZnCl 2处理I时,观察到-8-1 (2a)。观察到双环辛二烯酮2a,b在138°C时发生了逆Diels-Alder断裂,得到羟基(或三甲基甲硅烷氧基)苯基乙炔基酮3a,b,这是除炔基氰基酮以外的炔基烯酮的唯一实例。1烯酮3 b环加成到各种ketenophiles中,但最有趣的是,它与二苯乙炔发生不同寻常的反应,生成环戊二酮7和乙氧基丙炔,生成高度官能化的苯并呋喃酮8。