N-[(1,3-benzoxazol-2-yl)-heterocycle]amide derivatives for the treatment and prophylaxis of hepatitis b virus infection

A compound of the formula (I),

• wherein
• R1 is C1-6alkyl, C1-6alkylamino, (C1-6alkyl)2amino, C1-6alkoxy, C3-7cycloalkyl, phenyl, heterocyclyl or hetercyclylC1-6alkyl;
• wherein C1-6alkyl, C1-6alkylamino, (C1-6alkyl)2amino, C1-6alkoxy, C3-7cycloalkyl, phenyl, heterocyclyl and hetercyclylC1-6alkyl are unsubstituted or substituted by one or two or three substituents independently selected from aminocarbonyl, haloC1-6alkyl, C3-7cycloalkylsulfonyl, C1-6alkylsulfonyl, aminosulfonyl, C1-6alkylphenylsulfonyl, OH, halogen, C1-6alkyl, C1-6alkoxy, C1-6alkoxyC1-6alkoxy, C1-6alkylsulfonimidoyl, C1-6alkylsulfonylC1-6alkyl, C3-7cycloalkylC1-6alkylsulfonimidoyl, C3-7cycloalkylaminosulfonyl, haloC3-7cycloalkylaminosulfonyl, C1-6alkylsulfinyl, C3-7cycloalkylC1-6alkylsulfonyl, C3-7cycloalkylC1-6alkylsulfinyl, C3-7cycloalkylcarbonylaminosulfonyl and C3-7cycloalkylsulfonimidoyl;
• Cy is N-containing heterocyclyl;
• wherein N-containing heterocyclyl is unsubstituted or substituted by C1-6alkyl;
• X is a bond or CH2;
• A1 is N or CR2;
• wherein R2 is H, halogen, C1-6alkyl, or C1-6alkoxy;
• A2 is N or CR3;
• wherein R3 is H, halogen, C1-6alkyl, or C1-6alkoxy;
• A3 is N or CR4;
• wherein R4 is H, halogen, C1-6alkyl, or C1-6alkoxy;
• A4 is N or CR5;
• wherein R5 is H, halogen, C1-6alkyl, or C1-6alkoxy;
• or a pharmaceutically acceptable salt thereof.