| abstract |
The present invention relates to a process for synthesizing a compound of formula (I), R 1 is phenyl, which is unsubstituted or substituted with one, two or three substituents independently selected from halogen and C 1-6 alkyl; R 2 is C 1-6 alkyl; R 3 is -C x H 2x -; x is 1, 2, 3, 6 or 7; or pharmaceutically acceptable salt or diastereomer thereof, which is useful for prophylaxis and treatment of a viral disease in a patient relating to hepatitis B infection or a disease caused by hepatitis B infection. |