DUTHALER, R. O., HELV. CHIM. ACTA, 1983, 66, N 5, 1475-1492
作者:DUTHALER, R. O.
DOI:——
日期:——
Construction of Highly Substituted Nitroaromatic Systems by Cyclocondensation. Part I. Synthesis of 4-nitro-3-oxobutyrate
作者:Rudolf O. Duthaler
DOI:10.1002/hlca.19830660516
日期:1983.7.27
Methyl 4-nitro-3-oxobutyrate (1) is prepared by substitution of 4-bromo- and 4-iodo-3-oxobutyrate enol ether or enol acetate derivatives with nitrite and deprotection of the keto function (Schemes 2 and 3). A much more convenient access to 1 is, however, the nitration of acetoacetate dianion with alkyl nitrates (Scheme 4). Compound 1 is stable and storable, and can be handled safely. Its use in cyclocondensations