Synthesis of high-purity dialkyl 2-vinylcyclopropane-1,1-dicarbo

Details Synthesis of high-purity dialkyl 2-vinylcyclopropane-1,1-dicarbo Synthesis of high-purity dialkyl 2-vinylcyclopropane-1,1-dicarbo

1986-11-28

1987-12-15

Shippen, Michael L.

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

Organic compounds

Carboxylic acid esters

C07C 69743

Patent

active

047134798

ABSTRACT:
This invention relates to a two-step synthesis of high purity dialkyl 2-vinyl-cyclopropane-1,1-dicarboxylate in which a mixture of trans- and cis-1,4-dihalobutene-2 is first isomerized to essentially trans-1,4-dihalobutene-2 followed immediately by cyclocondensing the resultant trans-1,4-dihalobutene-2 with a malonic ester in the presence of an alcoholic solution of a metallic alkoxide.

REFERENCES:
patent: 4252739 (1981-02-01), Fayter
patent: 4321406 (1982-03-01), Fayter
patent: 4328168 (1982-05-01), Fayter

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