Reaktion #90229

Reaktionsgleichung

ethyl 3-bromo-1-(3-chloro-2-pyridinyl)-4,5-dihydro-1H-pyrazole-5-carboxylate

ethyl 3-bromo-1-(3-chloro-2-pyridinyl)-1H-pyrazole-5-carboxylate

→

3-bromo-1-(3-chloro-2-pyridinyl)-1H-pyrazole-5-carboxylic acid

Reaktionsbedingungen

Vorschrift

The following Example 10 illustrates an alternative preparation of ethyl 3-bromo-1-(3-chloro-2-pyridinyl)-4,5-dihydro-1H-pyrazole-5-carboxylate, which can be used to prepare, for example, ethyl 3-bromo-1-(3-chloro-2-pyridinyl)-1H-pyrazole-5-carboxylate (i.e. product of Example 9, Step B).

Quelle