Facile and One-Pot Synthesis of 1,2-Dihydroquinazolin-4(3<i>H</i>)-ones via Tandem Intramolecular Pinner/Dimroth Rearrangement
作者:Jian-Hong Tang、Da-Xin Shi、Li-Jun Zhang、Qi Zhang、Jia-Rong Li
DOI:10.1080/00397910902908822
日期:2010.2.12
method for the preparation of quinazolin-4-one derivatives was designed. The facile condensation of aromatic o-aminonitriles with aromatic aldehydes catalyzed by Lewis acid give 1,2-dihydroquinazolin-4(3H)-ones in moderate to good yields under refluxing dimethylformamide.
A modified Friedländer conversion of the cyclocondensation of aromatic o‐aminonitriles with carbonyl compounds was discovered. Systematic studies reveal that both the new transformation and the classic Friedländer annulation in the presence of ZnCl2 constitute a pair of divergent reaction, and thecontrolled PDF transformation of this divergent reaction was achieved in the present of bases.
DIHYDRO-QUINAZOLINE, -BENZOTHIAZINE AND -BENZOXAZINE DERIVATIVES AND USE THEREOF AS OREXIN RECEPTORS AGONISTS FOR TREATING OR PREVENTING NEUROLOGICAL DISEASES
申请人:[en]AEXON LABS. INC.
公开号:WO2024115797A2
公开(公告)日:2024-06-06
The present invention is directed to dihydro-quinazoline, -benzothiazine and -benzoxazine derivatives for use in the prevention or treatment of neurological, psychiatric, sleep disorders and diseases, advantageously in which central orexin neurotransmission is compromised or in which central and peripheral orexin receptors are involved. The present invention is also directed to pharmaceutical compositions comprising these compounds for use in the prevention and/or treatment of neurological disorders and diseases. The present invention is also directed to dihydro-quinazoline, -benzothiazine and -benzoxazine derivatives and the use of these compounds as a medicament.