Process for the preparation of substituted pyrazolines

Details Process for the preparation of substituted pyrazolines Process for the preparation of substituted pyrazolines

1993-12-20

1995-01-10

Ramsuer, Robert W.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

5483124, 5483641, 5483791, C07D23106

Patent

active

053808681

ABSTRACT:
A new process for the preparation of pyrazolines of formula ##STR1## In this, in a first reaction stage, ketones of formula (II) ##STR2## are reacted with bis-dialkylaminomethanes of formula (III)

REFERENCES:
patent: 5070098 (1991-12-01), Fuchs et al.
patent: 5086183 (1992-02-01), Fuchs et al.
Wiley, Pyrazoles, Pyrazolines, Pyrazolidines, Indazoles and Condensed Rings (1967) pp. 191, 192.
Synthetic Communica, Bd. 17, Nr. 7, 1987, Seiten 809-815 (Takahashi et al.).
Synthetic Communications, Bd. 14, Nr. 6, 1987, Seiten 585-590 (Matsumoto et al.).

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