Solid-phase synthesis of 2-cyanoquinazolin-4(3H)-one and 2,3-dihydrooxazolo[2,3-b]quinazolin-5-one derivatives utilizing resin-bound anthranilic acid derivatives
作者:Moon-Kook Jeon、Dong-Su Kim、Hyun Ju La、Deok-Chan Ha、Young-Dae Gong
DOI:10.1016/j.tetlet.2005.09.015
日期:2005.10
We were able to obtain 2-cyanoquinazolin-4(3H)-ones 11 in 35–60% four-step overall isolated yields and 2,3-dihydrooxazolo[2,3-b]quinazolin-5-ones 12 in 20–71% four-step overall isolated yields utilizing polymer-bound anthranilic acid derivatives 1, and 6-amino-2-cyanoquinazolin-4(3H)-ones 19 in 30–44% six-step overall isolated yields making use of anthranilic acid derivative resin 2 via dithiazole
我们能够以35–60%的四步总分离产率获得2-cyanoquinazolin-4(3 H)-ones 11和20–20中获得2,3-dihydrooxazolo [2,3- b ] quinazolin-5-ones 12利用邻氨基苯甲酸衍生物1和6-氨基-2-氰基喹唑啉-4(3 H)-ones 19的四步总分离产率为71%,而邻氨基苯甲酸的30-44%六步总分离产率为71%经由二噻唑树脂10和17的衍生树脂2。通过单珠ATR-FTIR光谱法监测固相反应。