| http://www.w3.org/ns/prov#value | - C. Alternatively, alkylation of 4-bromopyrazole can be carried out with an alkylating agent mentioned above, and a strong alkaline base such as lithium, sodium or potassium hydroxide in the presence of a phase transfer catalyst (Jones, R.A. Aldrichimica ACTA, 9(3), 35, 1976) such as benzyldimethyltetradecylammonium chloride, or benzyltrimethylammonium chloride.
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