7.7-dichlorobicyclo-(3.2.0)-hept-2-en-6-one

Details 7.7-dichlorobicyclo-(3.2.0)-hept-2-en-6-one 7.7-dichlorobicyclo-(3.2.0)-hept-2-en-6-one

C - Chemistry, Metallurgy

07

C

260/581

C07C 45/69 (2006.01)

Patent

CA 1049040

7.7-DICHLOROBICYCLO-[3.2.0]-HEPT-2-EN-6-ONE Abstract of the disclosure: 7.7-Dichlorobicyclo-[3.2.0]-hept-2-en-6-one is prepared from cyclopentadiene and dichloroketene, intermedially obtain- ed from dichloroacetyl chloride and a tertiary amine, by adding a mixture of cyclopentadiene and a tertiary amine at a tempe- rature of about 20 to 120°C to a mixture of an inert solvent and dichloroacetaldehyde or by adding a mixture of cyclopenta- diene and dichloroacetaldehyde at a temperature of about 20 to 120°C to a mixture of an inert solvent and a tertiary amine. 7.7-Dichlorobicyclo-[3.2.0]-hept-2-en-6-one is a valubale intermediate for syntheses of tropolone and of pesticides.

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