Process for the preparation and separation of cyclopropanecarbon

Details Process for the preparation and separation of cyclopropanecarbon Process for the preparation and separation of cyclopropanecarbon

1995-07-17

1996-03-26

Brust, Joseph Paul

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

Organic compounds

Nitriles

558434, C07C25300

Patent

active

055022340

ABSTRACT:
Disclosed is a novel process for the preparation and separation of cyclopropanecarbonitrile (CPCN) from cyclopropropanecarboxaldehyde (CPCA) using a combination of three process steps. The process involves the steps of (1) reacting (CPCA) with hydroxylamine base in the presence of water to obtain CPCA oxime, (2) contacting the CPCA oxime of step (1) with formic acid to obtain CPCN, and (3) contacting the mixture comprising CPCN formed in step (2) with a base to obtain a mixture comprising an organic phase containing CPCN and an aqueous phase. The reactants and intermediates involved in each step are used within certain defined ratios.

REFERENCES:
patent: 4235807 (1980-11-01), Fuhlhage
patent: 4686302 (1987-08-01), Merger et al.
patent: 5349103 (1994-09-01), Gu/ lec
patent: 5380911 (1995-01-01), Strong
T. ven Es, (J. Chem. Soc.) 1965, p. 1564.
G. A. Olah et al. Synthesis (1979) pp. 112-113.

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