Synthesis of Tetrahydro‐2(1H)quinazolinones, Cyclopenta[d]‐2(1H)pyrimidinones, and Their Thioxo Analogs from 2‐Trifluoroacetyl‐1‐methoxycycloalkenes
摘要:
A series of six (8)-alkyl-4-trifluoromethyl-5,6,7,8-tetrahydro-2(1H)quinazolinones, 4-trifluoromethyl-cyclopenta[d]-2(1H)pyrimidinones, and their thioxo analogs from the reaction of five beta-alkoxyvinyl trifluoromethyl ketones, derived from alkylated cyclohexanones and cyclopentanone with urea and thiourea, is reported. The reactions were carried out in a single step in propan-2-ol as solvent and boron trifluoride diethyl etherate as catalyst in 18-65% yield.