Metal and phosgene-free synthesis of 1H-quinazoline-2,4-diones by selenium-catalyzed carbonylation of o-nitrobenzamides
作者:Xiaowei Wu、Zhengkun Yu
DOI:10.1016/j.tetlet.2010.01.040
日期:2010.3
were efficiently synthesized by selenium-catalyzed carbonylation of o-nitrobenzamides under relatively mild conditions. In situ-generated carbonyl selenide (SeCO) is proposed to initiate the catalytic carbonylation. Thus, a concise transition metal and phosgene-free synthetic route to potentially bioactive-substituted 1H-quinazoline-2,4-dione derivatives has been developed.
A compound selected from those of formula (I):
1
wherein
A, B, D, X, R
1
, R
2
, m and n are as defined in the description, their diastereoisomers and addition salts thereof with a pharmaceutically acceptable acid or base.
A direct approach for the synthesis of N3-substituted quinazoline-2,4-diones via condensation of isatoic anhydrides with amines mediated by Ph3P-I2 was reported. Instead of the expected benzoxazinones, the reaction proceeds with an amine attack at the C-4 position of isatoic anhydrides leading to quinazoline-2,4-diones upon heating in the presence of base. This one-pot process enables a rapid construction
Nouveaux composés dérivés de la quinazoline, leur procédé de préparation et les compositions pharmaceutiques qui les contiennent
申请人:Les Laboratoires Servier
公开号:EP1346992A1
公开(公告)日:2003-09-24
Composés de formule (I) :
dans laquelle :
A, B, D, X, R1, R2, m et n sont tels que définis dans la description, leurs stéréoisomères ainsi que leurs sels d'addition à un acide ou à une base pharmaceutiquement acceptable.
式(I)化合物
其中:
A、B、D、X、R1、R2、m 和 n 如描述中所定义,它们的立体异构体及其与药学上可接受的酸或碱的加成盐。
Jacini, Gazzetta Chimica Italiana, 1943, vol. 73, p. 85,87