The nitration of 2-ethoxycarbonylaminochromone

Zagorevskii, V. A.; Glozman, Sh. M.; Zhmurenko, L. A.

doi:10.1007/bf00601158

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“…50 N-Trichloroacetyland N-ethoxycarbonyl-2-aminochromones are selectively chlorinated at the C(3) atom on treatment with SO 2 Cl 2 in CHCl 3 at *20 8C. 51 In the I 2 ± HIO 4 system, N-ethoxycarbonyl-2-aminochromone affords the 3-iodo-derivative in a yield of 78%. 52 Refluxing a solution of ethyl chromone-2-carboxylate in sulfuryl chloride in the presence of benzoyl peroxide for 10 h gives a mixture consisting of approximately equal amounts of mono- (22) and di-chloro (23,24) derivatives.…”

Section: Methodsmentioning

confidence: 99%