An efficient synthesis of 4-alkyl-2(1H)-quinazolinones and 4-alkyl-2-chloroquinazolines from 1-(2-alkynylphenyl)ureas
摘要:
An efficient synthesis of 4-alkyl-2(1H)-quinazolinones has been achieved by cyclization of 1-(2-alkynylphenyl)ureas (2 R-2 = alkyl) in dichloroethane catalyzed by TfOH. In the case of aryl substitution (2 R-2 = aryl), a mixture of quinazolinone tautomers is obtained in dichloroethane with TFA as co-solvent. Chlorination of the resulting mixture affords 4-alkyl-2-chloro-quinazolines as sole products. (C) 2009 Elsevier Ltd. All rights reserved.
[EN] IMPROVED HONEYBEE REPELLENTS AND USES THEREOF<br/>[FR] RÉPULSIFS AMÉLIORÉS CONTRE LES ABEILLES DOMESTIQUES ET LEURS UTILISATIONS
申请人:INSCENT INC
公开号:WO2014179785A1
公开(公告)日:2014-11-06
The present specification discloses honeybee repellents exhibiting repellent properties similar to 2- heptanone, compositions comprising such repellents, uses to repel a honeybee from a mammal, location, plant, structure treated of such repellents, and methods of treating a mammal, location, plant, structure by applying such repellents.