This invention relates to a method for preparing a 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.
本发明涉及一种制备公式I的3-卤代-4,5-二氢-1H-
吡唑化合物的方法,包括将公式II中不同的4,5-二氢-1H-
吡唑化合物与HX1接触,其中X1是卤素,L、R、k和X2如本公开说明书所定义。本发明还揭示了制备公式III化合物的方法,其中X1、R3、R6、R7、R8a、R8b和n如本公开说明书所定义。