A novel and flexible synthetic route is described for the synthesis of 5,6,8-alkyl-7-methoxy-2-aminoquinazolines using dihydrobenzenes as key intermediates. (C) 2002 Elsevier Science Ltd. All rights reserved.
The clemmensen reduction of enol ethers: cyclopropyl ethers from mono- and di-methoxycyclohexa-1,4-dienes
作者:Irène Elphimoff-Felkin、Pierre Sarda
DOI:10.1016/s0040-4039(00)85915-8
日期:1983.1
Clemmensenreduction (zinc and hydrogen chloride in dry diethyl ether) of 1-methoxy- and 1,5-dimethoxy-cyclohexa-1,4-diene affords the cyclopropyl ethers, 1-methoxy- and 1,5-dimethoxy-bicyclo[3.1.0]hexane; in the presence of acetic anhydride, reduction of 6-acetyl-1-methoxy-6-methyl-cyclohexa-1,4-diene leads regiospecifically to 7-acetoxy-1-methoxy-6,7-dimethyl-bicyclo[4.1.0]hept-4-ene.