Lewis-acid-promoted cyclization reaction: synthesis of N3-chloroethyl and N3-thiocyanatoethyl quinazolinones
作者:Fang-Peng Hu、Ming-Ming Zhang、Guo-Sheng Huang
DOI:10.1039/d1nj01435h
日期:——
A Lewis-acid-promoted cyclization reaction of benzoyl chlorides with 2-(4,5-dihydrooxazol-2-yl)anilines, which can offer a series of N3-chloroethyl quinazolinones, is disclosed. The reaction is compatible with the functional groups of the substrates; environment-friendly AlCl3 is probably the chloride source. Moreover, the addition of NH4SCN can also produce a range of N3-thiocyanatoethyl quinazolinones
Studies on Quinazolines. 11. Intramolecular Imidate-Amide Rearrangement of 2-Substituted 4-(ω-Chloroalkoxy)quinazoline Derivatives. 1,3 -O → N Shift of Chloroalkyl Groups via Cyclic 1,3-Azaoxonium Intermediates
作者:Grace Shiahuy Chen、Shivaramayya Kalchar、Chun-Wei Kuo、Chih-Shiang Chang、Cyril O. Usifoh、Ji-Wang Chern
DOI:10.1021/jo0263420
日期:2003.3.1
The omega-chloroalkylation of 2-substituted quinazolin-4(3H)-one derivatives 1 and 2 with Br-(CH(2))(n)-Cl (n = 2-4) and the intramolecular imidate-amide rearrangement of the alkylated products are described. At room temperature, the 2-phenyl substituent promoted O-alkylation, whereas the less steric 2-benzyl group led to a higher ratio of N-alkylation. The investigation of the O-alkylated products