Method for the preparation of alpha-chlorinated chloroformates

Details Method for the preparation of alpha-chlorinated chloroformates Method for the preparation of alpha-chlorinated chloroformates

1997-01-14

1998-01-27

Ivy, C. Warren

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

Organic compounds

Halocarbonate esters

558282, 502167, 502162, 549499, C07C 6802, C07C 6996

Patent

active

057124078

ABSTRACT:
Novel catalysts for the synthesis of a alpha-chlorinated chloroformate from an aldehyde and phosgene are described. The catalysts include alkyl substituted guanidines, hexasubstituted guanidinium chlorides, substituted biguanidinium chloride, phenyldialkyliminiumtetraalkylguanidinium chloride, dialkylimidazolinium tetraalkylguanidinium chloride, phenyltetraalkylamidinium chloride and N,N-dialkyl-N'-alkylpyrrolidinium chloride.

REFERENCES:
patent: 4592872 (1986-06-01), Cagnon
patent: 4592874 (1986-06-01), Cagnon
patent: 4614829 (1986-09-01), Malfroot
patent: 4806286 (1989-02-01), Senet
patent: 5298646 (1994-03-01), Guzik et al.
patent: 5616771 (1997-04-01), Kahl

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