A simple approach to alkylated nitroaromatics from substituted nitroaryl malonic esters by double decarboxylation is detailed.
详细介绍了一种通过双脱羧反应从取代硝基芳基丙二酸酯制备烷基化硝基芳烃的简便方法。
A New Route to Prepare 6-Chloro-5-(2-chloroethyl)oxindole
作者:Mukund K. Gurjar、A. M. S. Murugaiah、Dandepally Srinivasa Reddy、Mukund S. Chorghade
DOI:10.1021/op020095k
日期:2003.5.1
6-Chloro-5-(2-chloroethyl)oxindole, a key intermediate in the manufacturing of the antipsychotic drug, ziprasidone, has been synthesized by a new route. The salient features of the synthesis are (1) bis-dialkylation of 2,4-difluoro-5-chloronitrobenzene with sodium diethyl malonate, (2) decarboxylative hydrolysis to obtain the oxindole derivative, and (3) reduction and chlorination of acetic ester side
An improved procedure for the regiospecific synthesis of electron deficient 4- and 6-substituted isatins
作者:Erica A. Kraynack、Jackline E. Dalgard、Federico C.A. Gaeta
DOI:10.1016/s0040-4039(98)01719-5
日期:1998.10
The regiospecific synthesis of 4- and 6-substituted isatins 5a-g in four steps from halonitrobenzenes 1a-g has been investigated for a variety of substrates (Scheme 1). The procedure makes use of readily available, easily handled materials and in most cases purification of neither intermediates nor final products is required. Yields of isatins are between 26 and 75% (Table 1). Improved yields of known