Even acyclic tertiaryamines such as triethylamine, tri-n-propylamine and tri-n-butylamine, which have been believed to be inert to aromatic and heteroaromatic halides, underwent SNAr reactions with aromatic and heteroaromatic halides to give the dialkylamino derivatives; in the case of monocyclic amines like N-methylpyrrolidine and N-methylpiperidine, the dealkylation being regioselective.
甚至被认为对芳族和杂芳族卤化物呈惰性的无环叔胺,如三乙胺,三正丙胺和三正丁胺,也与芳族和杂芳族卤化物进行S N Ar反应,得到二烷基氨基衍生物;在单环的胺等的情况下Ñ -甲基吡咯烷和Ñ甲基哌啶,脱烷基化区域选择性被。
Copper-Catalyzed Tandem Reaction of 2-Haloaniline Derivatives with Tetraalkylthiuram Disulfides: Selective Synthesis of 2-Aminobenzothiazoles
for the synthesis of 2-aminobenzothiazoles by copper-catalyzedtandemreaction has been developed. In the presence of CuBr and Cs 2 CO 3 , a variety of 2-haloanilines underwent the reaction with tetramethylthiuram disulfide (TMTD) efficiently to afford the corresponding 2-aminobenzothiazoles in moderate to excellent yields. The present process allows the construction of 2-aminobenzothiazoles from a
Organophosphine-free copper-catalyzed isothiocyanation of amines with sodium bromodifluoroacetate and sulfur
作者:Wei Feng、Xing-Guo Zhang
DOI:10.1039/c8cc09190k
日期:——
A new copper-catalyzed isothiocyanation of amines with sodium bromodifluoroacetate and sulfur for the synthesis of isothiocyanates and various heterocycles is described.
通过钠溴二氟乙酸盐和硫对胺进行铜催化的新型异硫氰化反应,用于合成异硫氰酸酯和各种杂环化合物。
Scope and Mechanism of Palladium-Catalyzed Amination of Five-Membered Heterocyclic Halides
作者:Mark W. Hooper、Masaru Utsunomiya、John F. Hartwig
DOI:10.1021/jo0266339
日期:2003.4.1
Detailed studies have been conducted to determine the activity of palladium catalysts for the amination of five-membered heterocyclic halides and to determine the factors that control the scope of this reaction. Palladium-catalyzed aminations of the electron-rich furanyl, thiophenyl, and indolyl halides and of the related 2-halogenated thiazoles, benzimidazole, and benzoxazole have been shown to occur
Electrochemical intramolecular dehydrogenative C–S bond formation for the synthesis of benzothiazoles
作者:Pan Wang、Shan Tang、Aiwen Lei
DOI:10.1039/c7gc00468k
日期:——
An external oxidant-free intramolecular dehydrogenative C-S cross-coupling has been developed under undivided electrolytic conditions. Various 2-aminobenzothiazoles could be synthesized with up to 99% yield from the direct combination of aryl...