Synthesis of cycloproparenes<i>via</i>aromatization of 7-Oxanorbornenes with Low-Valent titanium
作者:Paul Müller、Jean-Pierre Schaller
DOI:10.1002/hlca.19890720721
日期:1989.11.1
1H-Cyclopropa[b]naphthalene 3c and the 2,7-diphenyl-substituted derivative 3a have been synthesized via cycloaddition of the appropriate isobenzofurans 1a and 1b to 1-bromo-2-chlorocyclopropene and aromatization of the adducts with low-valent Ti. The same procedure afforded the 2,7-dimethyl-H-cyelopropa[g]isoquinoline (15), but failed for the parent azacompound. Reaction of adducts of furans to 1-
通过将适当的异苯并呋喃1a和1b环加成至1-溴-2-氯环丙烯并用低价Ti进行加合物的芳构化反应,合成了1 H-环丙烷[ b ]萘3c和2,7-二苯基取代的衍生物3a。。相同的步骤,得到2,7-二甲基- ħ -cyelopropa [克]异喹啉(15),但未能父azacompound。呋喃与1-溴-2-氯环丙烯的加合物与低价Ti生成的环丙烷苯19和1,6-二卤代-1,3,5-环庚烷18的混合物反应。后者可以用BuLi转化为环丙苯。