Cyclopropanation of 3-(2-Oxo-2H-chromen-3-yl-carbonyl)-2H-chromen-2-one with Zinc Enolates Derived from 1-Aryl-2,2-dibromoalkanones

Author： Shchepin V.   Russkikh N.   Uzun D.   Silaichev P.  

Publisher： MAIK Nauka/Interperiodica

ISSN： 1070-4280

Source： Russian Journal of Organic Chemistry, Vol.41, Iss.1, 2005-01, pp. : 131-133

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Abstract

Zinc enolates derived from 1-aryl-2,2-dibromoalkanones react with 3-(2-oxo-2H-chromen-3-ylcarbonyl)-2H-chromen-2-one to give 1-alkyl-1-aroyl-1a-(2-oxo-2H-chromen-3-ylcarbonyl)-1a, 7b-dihydrocyclopropa[c]-chromen-2(1H)-ones as a single stereoisomer.

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