This invention relates to a method for preparing a 3-halo-4,5-dihydro-1H-pyrazole compound of Formula I ##STR00001## comprising contacting with HX.sup.1 a different 4,5-dihydro-1H-pyrazole compound of Formula II ##STR00002## wherein X.sup.1 is halogen and L, R, k and X.sup.2 are as defined in the disclosure. This invention also discloses preparation of compounds of Formula III ##STR00003## wherein X.sup.1, R.sup.3, R.sup.6, R.sup.7, R.sup.8a, R.sup.8b and n are as defined in the disclosure.

 
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