A series of pyrido[2,3-d]pyrimidine derivatives were easily constructed by cyclocondensation reactions of 6-aminouracils......

以莽草酸为原料，与甲醇成酯，然后丙酮叉保护顺式的邻二羟基，叔丁基二甲硅氯保护另一个羟基，最后用氢化铝锂和三氯化铝还原，得到标题化合......