| abstract |
This invention relates to 1-azaindolizine derivatives represented by general formula (I), wherein R₁ and R₂ represent each independently hydrogen, halogen, C₁ to C₄ alkyl or C₁ to C₄ alkoxy, and R₃ represents C₁ to C₆ alkyl, C₁ to C₄ alkyl substituted by C₃ to C₅ cycloalkyl, hydroxy, acetylamino, C₁ to C₄ alkoxy or cyano, or C₂ to C₄ alkenyl, intermediates for use in the synthesis thereof, and antiallergics containing said derivatives. |