Studies in the cycloproparene series: chemistry of 1-acyl-1H-cyclopropa[b]naphthalenes and synthesis of cyclopropa[b]naphthalenylidene enol ethers
作者:Brian Halton、Carissa S Jones、Davor Margetic
DOI:10.1016/s0040-4020(01)00234-4
日期:2001.4
derivatives. This reaction sequence leads to the first cyclopropa[b]naphthalenylidene enol ethers and provides the only example of exocyclic alkene formation taking place in one step from the benzylic centre. Protonation of the acyl derivatives by mineral acid triggers three-membered ring opening to 2,3-disubstituted naphthalenes rather than 2-monosubstituted analogues that typically arise from protonation
1 H-环丙烷[ b ]萘基阴离子与N,N-二甲基酰胺反应以高收率提供C-1酰基衍生物,这是环丙烯系列中单取代的罕见例子。这些酰基环丙烷的可用性为随后的苄基质子提取和烯醇酸离子拦截提供了O-甲硅烷基和O-次膦酸酯衍生物。该反应序列导致第一个环丙烷[ b萘萘烯烯醇醚是环外烯烃形成的唯一实例,该步骤是从苄基中心一步进行的。酰基衍生物被无机酸质子化会触发三元环向2,3-二取代的萘而不是通常由芳环质子化产生的2-单取代的类似物开环。在热解时,发生环膨胀成萘并呋喃。