Reactions of thioamides with metal carboxylates in organic media
摘要:
Reactions of thioamides with metal carboxylates in organic solvents are described. These processes enable the selective preparation of nitriles, imides or amides depending on the substitution pattern of the starting material. Mechanistic hypotheses supported by experimental evidences, including the unequivocal synthesis of bis(thioacetanilide)mercury(II) as a key reaction intermediate, are also proposed. (C) 1997 Elsevier Science Ltd.
activity in various solvents under mild conditions and showed excellent stability. The catalytic performance was also evaluated in the one‐pot reduction of nitroaromatics and amidation with carboxylicacids under a hydrogen atmosphere at 100 °C. These methods for the hydrogenation of nitroaromatics and the direct amidation of nitroaromatics with carboxylicacids are simple, economical, and environmentally
Method for the production of alkyl aryl sulphonates
申请人:——
公开号:US20040030209A1
公开(公告)日:2004-02-12
The preparation of alkylaryl compounds takes place by
1) preparation of a mixture of, on statistical average, predominantly monobranched C
10-14
-olefins by
a) reaction of a C
4
-olefin mixture over a metathesis catalyst for the preparation of an olefin mixture comprising 2-pentene and/or 3-hexene, and optional removal of 2-pentene and/or 3-hexene, followed by dimerization of the resulting 2-pentene and/or 3-hexene over a dimerization catalyst to give a mixture comprising C
10-12
-olefins, and optionally removal of the C
10-12
-olefins, or
b) extraction of predominantly monobranched paraffins from kerosene cuts and subsequent dehydrogenation, or
c) Fischer-Tropsch synthesis of olefins or paraffins, where the paraffins are dehydrogenated, or
d) dimerization of shorter-chain internal olefins, or
e) isomerization of linear olefins or paraffins, where the isomerized paraffins are dehydrogenated,
2) reaction of the olefin mixture obtained in stage 1) with an aromatic hydrocarbon in the presence of an alkylation catalyst which contains zeolites of the faujasite type.
Reaction of thioamides with silver carboxylates in aprotic media. A nucleophilic approach to the synthesis of imides, amides, and nitriles
作者:Martín Avalos、Reyes Babiano、Carlos J. Durán、José L. Jiménez、Juan C. Palacios
DOI:10.1016/0040-4039(94)85085-2
日期:1994.1
Syntheses of nitriles, imides, and amides by reaction of silvercarboxylates with unsubstituted, N-substituted, and N,N-disubstituted thioamides in aprotic media are described.
Abstract Mediated by samarium diiodide, various amides were prepared directly from nitroarenes and esters under mild conditions in a one‐pot procedure.
Compounds of the formula ##STR1## wherein R is alkyl having 1 to 4 carbon atoms, one of Y and Z is a heterocyclic moiety, and the other of Y and Z is hydrogen, alkyl having 1 to 4 carbon atoms or alkoxy having 1 to 4 carbon atoms are useful as anthelmintics.