Abstract
Sulfur-assisted carbonylation of 2-aminobenzonitriles with carbon monoxide using K2CO3 as a base under ambient conditions (1 atm, 20°C) to afford 2-hydroxy-4-mercaptoquinazolines in excellent yields was found. This carbonylation was applied to chemical fixation of carbon dioxide under mild conditions. Carbon dioxide (1 atm) easily reacted with 2-aminobenzonitriles at 20°C assisted by 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) to give 2,4-dihydroxyquinazolines in excellent yields. © 2000 John Wiley & Sons, Inc. Heteroatom Chem 11:428–433, 2000
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