The present Invention relates to bicyclic Heterocycles of General formula (i), and Pharmaceutical compositions thereof, which are inhibitors of one or more Enzymes of FGFR and are useful in the treatment of related diseases such as cancer, FGFR, where W is R0 R1 is alkyl, etc. C1 - C6, etc. R2, R3 and R5 are h, Halo, Halo is H etc. R4, R6 H Halo, etc., etc.R7 and R8 is H, alkyl etc.r9 C1 - C6 C1 - 6 IS h, alkyl, etc.. The preferred compounds are among others: 7-amino-3 - (2,6 - difluoro - 3.5 - dimetoxifenil) - 1.8 - dimethyl - 3.4 - dihidropirido [4,3-d] - 2 (1H) - pyrimidine ona； 7-amino-3 - (2,6 - Difluoro - 3.5 - dimetoxifenil) - 8 - 1 - methyl - ethyl - 4 - dihidropirido [4, 3 - d] pyrimidine - 2 (1H) - OneLa presente invencion se refiere a heterociclos biciclicos de formula (I), y composiciones farmaceuticas de estos, que son inhibidores de una o mas enzimas del FGFR y son utiles en el tratamiento de enfermedades relacionadas con el FGFR, como el cancer, donde: W es R9, etc. R1 es alquilo C1-C6, etc. R2, R3 y R5 son H, halo, etc. R4 es H, halo, etc. R6 es H, halo, etc. R7 y R8 son H, alquilo C1-C6, etc.R9 es H, alquilo C1-6,etc. los compuestos preferidos son entre otros:7-amino-3- (2,6-difluoro-3,5-dimetoxifenil)-1,8-dimetil-3,4-dihidropirido [4,3-d]pirimidin-2 (1H)-ona；7-amino-3-(2,6- difluoro-3,5-dimetoxifenil)-8-etil-1-metil-3,4-dihidropirido[4,.3-d] pirimidin-2 (1H)-ona
