Synthesis of quinazolinones from anthranilamides and aldehydes via metal-free aerobic oxidation in DMSO
作者:Na Yeun Kim、Cheol-Hong Cheon
DOI:10.1016/j.tetlet.2014.02.065
日期:2014.4
A highly environmentally benign protocol for the synthesis of quinazolinones from anthranilamides and aldehydes via aerobicoxidation was developed in wet DMSO. This protocol is operationally simple, exhibits broad substrate scope, and does not need toxic metal catalysts and bases. In addition, the utility of this transformation was further demonstrated by converting the resulting quinazolinones into
申请人:Korea University Research and Business Foundation 고려대학교 산학협력단(220040170680) BRN ▼209-82-08298
公开号:KR101580821B1
公开(公告)日:2015-12-30
본 발명은 금속과 염기가 배제된 디메틸설폭사이드(dimethylsulfoxid, DMSO) 용매하에서 산소원를 산화제로 사용하는 호기성 산화법을 이용하여 퀴나졸리논 유도체를 제조하는 방법에 관한 것으로, 본 발명에 따른 퀴나졸리논 유도체의 제조방법은 팔라듐이나 이리듐 등과 같은 금속촉매를 필요로 하지 않아 잔존하는 금속에 의한 독성문제가 없으며, 강한 산 또는 염기조건, 저온 반응 및 무수조건의 반응과 같은 까다로운 공정을 필요로 하지 않으며, 별도의 정제공정을 필요로 하지 않아 경제적이고, 간단하게 안트라닐아미드 유도체와 알데히드원을 반응시켜 퀴나졸리논 유도체를 도입할 수 있다.
The reaction of some fluorinated 1,2,4-oxadiazoles in the presence of methylamine or propylamine has been investigated. The irradiation in methanol or acetonitrile leads with acceptable yields to the corresponding fluorinated 1-methyl- or 1-propyl-1,2,4-triazole.
Fluorinated Heterocyclic Compounds. A Photochemical Approach to a Synthesis of Fluorinated Quinazolin-4-ones
An efficient and generalized photochemical methodology for the preparation of fluorinated quinazolin-4-ones is described. Depending on the starting substrate, quinazolin-4-ones bearing a perfluoroalkyl- or perfluoroaryl- substituent in position 2 or fluorine atoms on any positions of the benzo-fused moiety can easily be obtained. 5-Aryl-3-perfluoroalkylpentafluorophenyl- or 5- polyfluoroaryl-3-phenyl(methyl)-1