Depolymerization of chloroaldehyde cyclic trimers

Details Depolymerization of chloroaldehyde cyclic trimers Depolymerization of chloroaldehyde cyclic trimers

1994-10-20

1996-02-27

Evans, Joseph E.

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

Organic compounds

Oxygen containing

569457, C07C 4555, C07C 4714

Patent

active

054950503

ABSTRACT:
A method for producing high purity chloroaldehyde monomers at a high yield by depolymerization of a chloroaldehyde cyclic trimer represented by the following formula, ##STR1## wherein R is a hydrogen atom, methyl group, or an ethyl group. The depolymerization reaction can be carried out in the presence of activated clay. Said chloroaldehyde cyclic trimer can be stored in a stable manner and chloroaldehyde monomers obtained by the depolymerization can be used as are as a raw material for the synthetic reaction of chloroaldehyde derivatives.

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patent: 3801645 (1974-04-01), Dalman
Plewe et al., "(+)-Erythro-Gamma, Delta-Dihydroxycarboxylic Acid Lactones From a Beta-Lithiopropionate Equivalent and Alpha-Chloroaldehydes", Synthesis-Stuttgart, 7:534-536 (1989).
Takashi Wakasugi et al., "Preparation of Chloroacetaldehyde Cyclic Trimer and Its Depolymerization", Chemistry Letters, pp. 171-172 (1992).
Takashi Wakasugi et al., "One-pot Preparation of 2-Chloromethyldioxolanes and 2-Aminothiazoles from Chloromethyltrioxanes" Chemistry Letters pp. 2039-2042 (1994).

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