An efficient and clean synthesis of pyrido[2,3-<i>d</i>]pyrimidine-4,7-dione derivatives in aqueous media
作者:Da-Qing Shi、Jing-Wen Shi、Shao-Feng Rong
DOI:10.1002/jhet.223
日期:2009.11
A series of 2‐amino‐5‐aryl‐5,6‐dihydropyrido[2,3‐d]pyrimidine‐4,7(3H,8H)‐dione derivatives were synthesized via the three‐component reaction of aromatic aldehyde, 2,6‐diaminopyrimidine‐ 4(3H)‐one, and Meldrum's acid in water in the presence of triethylbenzylammonium chloride (TEBAC). This protocol has the advantages of easier work‐up, milder reaction conditions, and environmentally benign procedure
通过芳族醛的三组分反应,合成了一系列2-氨基-5-芳基-5,6-二氢吡啶并[2,3- d ]嘧啶-4,7(3 H,8 H)-二酮衍生物。 2,6-二氨基嘧啶-4(3 H)-1 ,以及在三乙基苄基氯化铵(TEBAC)存在下的水中的Meldrum酸。该方案的优点是操作简便,反应条件温和且对环境无害。J.杂环化学,(2009)。