作者:Markus Werner、David S. Stephenson、Günter Szeimies
DOI:10.1002/jlac.199619961103
日期:1996.11
Several [1.1.1]propellanes were synthesized by bridging the 1,3-positions of the corresponding bicyclo[1.1.0]butane. The synthesis of 1-bromo-3-(chloromethyl)bicyclobutanes and the bridging were carried out in a one-pot reaction by addition of 2.0 equiv. of MeLi to 1,1-dibromo-2,2-bis(chlormethyl)-cyclopropanes 10. Three routes to 10 were investigated: Firstly, the Wittig reaction of 1,3-dichloroacetone
通过桥接相应的双环[1.1.0]丁烷的1,3-位,合成了几种[1.1.1]丙炔。1-溴-3-(氯甲基)双环丁烷的合成和桥连通过添加2.0当量的一锅法进行。MeLi合成1,1-二溴-2,2-双(氯甲基)-环丙烷10。研究了10种方法的三种途径:首先,除6m外,1,3-二氯丙酮的Wittig反应成功生成(氯甲基)烯丙基氯6,仅用衍生自伯烷基卤化物的Wittig试剂成功,其次,还原二乙基与苯中的LiAlH 4的亚烷基丙二酸酯,得到甲醇12,将其转化为6通过与N-氯代琥珀酰亚胺/二甲基硫醚反应。的环丙烷化6至10是通过相转移催化的条件下与溴仿/ NaOH调节反应来实现的。最后,根据顺序11 13 14 10,从亚烷基丙二酸二乙酯开始,还原和环丙烷化的顺序可以互换。丙烷5b和3用LiAlH 4还原为双环[1.1.1]戊烷15b和e。5d和5p的二维INADEQUATE NMR光谱表明耦合常数J(13