摘要 |
This invention relates to a method for preparing 3-halo-4,5-dihydro-1H-pyrazole compound of Formula (I), comprising contacting with HX<1> a different 4,5-dihydro-1H-pyrazole compound of Formula (II), wherein X<1> is halogen and L, R, k and X<2> are as defined in the disclosure. This invention also discloses preparation of compounds of Formula (III) wherein X<1>, R<3>, R<6>, R<7>, R<8a>, R<8b>, and n are as defined in the disclosure. |