Versatile synthesis of bicyclo[4.3.0]nonenes and bicyclo[4.4.0]decenes by a domino Heck-Diels-Alder reaction
作者:Kiah How Ang、Stefan Bräse、Arno G. Steinig、Frank E. Meyer、Amadeu Llebaria、Katharina Voigt、Armin de Meijere
DOI:10.1016/0040-4020(96)00639-4
日期:1996.8
afterwards in a one-pot process) to give bicyclo[4.3.0]nonene and bicyclo[4.4.0]-decene derivatives in good to excellent yields. Among the examples reported are the first cases of intramolecular Heck reactions with a (bromomethylene)cyclopropane starter or/and a methylenecyclopropane terminator which occur without ring opening of the cyclopropyl group.
在钯催化下,将各种2-bromo-1,6-和2-bromo-1,7-二烯进行环化,生成邻位的exodimethylcycloalkanes,它们与亲双烯体反应(既可以在环化过程中存在,也可以在随后的一锅法中加入),从而生成双环[4.3.0]壬烯和双环[4.4.0]-癸烯衍生物具有良好的收率和优异的收率。在所报道的实例中是在没有环丙基的开环的情况下发生的与(溴代亚甲基)环丙烷起始剂或/和亚甲基环丙烷终止剂的分子内Heck反应的第一种情况。