2,4-Dichloropyrido[2,3-d]pyrimidine

Профиль реактивности

Selective disubstitution of 2,4-dichloropyrido[2,3-d]pyrimidine with various nucleophiles was investigated by Lavecchia et al. Suzuki and Stille cross-coupling reactions on monosubstituted compound 4-tert-butylamino-2-chloro-pyrido[2,3-d]pyrimidine were performed in high yields. ,4-dichloropyrido[2,3-d]pyrimidine was easily substituted at position 4 with different nucleophiles. This position was more reactive than position 2, as in simple pyrimidinic systems. 2,4-dichloropyrido[2,3-d]pyrimidine 3 was prepared from 2-aminonicotinic acid 1 via 2,4-dihydroxypyrido[2,3-d]pyrimidine 2 following Robin and Hitchings method.