| 摘要 |
Compounds useful as anti-allergic agents are 2-Q-4-[XZC=C(R)NH]-5-R1-6-R2-pyrimidines (I), where Q is 4- or 3- or 2-pyridinyl or 4- or 3- or 2-pyridinyl having one or two lower-alkyl substituents or N-oxide thereof, R is hydrogen or lower-alkyl, R1 is hydrogen, lower-alkyl or cyano, R2 is hydrogen, lower-alkyl, hydroxy or halo, X and Z are the same or different and are each selected from lower-carbalkoxy, lower-alkanoyl, carbamyl and cyano, or <IMAGE> where R3 and R4 are each lower-alkyl, or X is hydrogen, are prepared by reacting 4-amino-2-Q-5-R1-6-R2-pyrimidine (II where Q' is amino) with R'O-C-(R)=CXZ (III). Preparations of II are given. Also shown as intermediates and/or anti-allergic agents are 4-(AcNH)-2-Q-5-R1-6-R2-pyrimidines (IV) and 4-(R5R6N)-2-Q-5-R1-6-R2-pyrimidines (V) where Ac is lower-alkanoyl or lower-carbalkoxy, R5 is hydrogen, lower-alkyl or lower-hydroxyalkyl, and R6 is lower-alkyl or lower-hydroxyalkyl.
|
