Preparation of 3-methylpyrazole

Details Preparation of 3-methylpyrazole Preparation of 3-methylpyrazole

1991-08-15

1992-07-07

Ramsuer, Robert W.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D23112

Patent

active

051284804

ABSTRACT:
3-Methylpyrazole and its derivatives are prepared by reacting butenediols or ethynylalkylcarbinols or their acylates in 30-100% by weight sulfuric acid with unsubstituted or substituted hydrazine or its salts in the presence of catalytic amounts of iodine or an iodine compound.

REFERENCES:
patent: 4423225 (1983-12-01), Lantzsch et al.
patent: 4424364 (1984-01-01), Goetz et al.
patent: 4434292 (1984-02-01), Heinemann et al.
patent: 4996327 (1991-02-01), Merkle et al.

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