| 摘要 |
<p>This invention provides compounds of Formula (I), methods for their preparation and use for preparing compounds of Formula (II) wherein R1, R2, R3, R5, R6, X and n are as defined in the disclosure. This invention also discloses preparation of compounds of Formula (III) wherein R1, R2, R7, R8, R9 and n are as defined in the disclosure. This invention also pertains to certain compounds of Formula 4 and 6 used to prepare compounds of Formula (I), wherein R1, R2, R5, X and n are as defined in the disclosure.</p> |
