Conclusions
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1.
The addition of chlorobromomalonic ester to methyl acrylate, initiated by the Fe(CO)5 + DMF system, proceeds with the cleavage of the C-Br bond in the addendum and the formation of (C2H5OOC)5CClCH2CHBr-COOCH3.
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2.
The chlorobromo- and dichloromalonic esters when treated with Fe(CO)5 are capable of cleaving both halogen atoms and, in the absence of an unsaturated compound, form tetraethyl ethylene tetracarboxylate, while with methyl acrylate they form l, l-dicarbethoxy-2-carbomethoxycyclopropane.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 12, pp. 2815–2818, December, 1981.