Novel Solid-Phase Parallel Synthesis of <i>N</i>-Substituted-2-aminobenzo [<i>d</i>]thiazole Derivatives via Cyclization Reactions of 2-Iodophenyl Thiourea Intermediate Resin
作者:Seul-Gi Kim、Se-Lin Jung、Gee-Hyung Lee、Young-Dae Gong
DOI:10.1021/co300112b
日期:2013.1.14
N-sulfonyl-2-aminobenzo[d]thiazole derivatives. The key step in this procedure involves the preparation of polymer-bound 2-aminobenzo[d]thiazole resins 5 by cyclization reaction of 2-iodophenyl thiourea resin 3. The resin-bound 2-iodophenyl thiourea 3 is produced by addition of 2-iodophenyl isothiocyanate 2 to the amine-terminated linker amide resin 1. These core skeleton 2-aminobenzo[d]thiazole resins 5 undergo
已经开发了用于合成N-烷基,N-酰基和N-磺酰基-2-氨基苯并[ d ]噻唑衍生物的新型固相方法。该过程中的关键步骤涉及通过2-碘苯基硫脲树脂3的环化反应制备与聚合物结合的2-氨基苯并[ d ]噻唑树脂5。通过将2-碘苯基异硫氰酸酯2添加到胺封端的连接酰胺树脂1中来生产树脂结合的2-碘苯基硫脲3。这些核心骨架的2-氨基苯并[ d ]噻唑树脂5经历与各种亲电子,如烷基卤,酰基氯,和磺酰氯官能化反应以产生Ñ -烷基,Ñ -酰基,和Ñ磺酰基-2-氨基苯并[ d ]噻唑树脂6,7,和8,分别。最后,Ñ -烷基,Ñ -酰基,和Ñ磺酰基-2-氨基苯并[ d ]噻唑衍生物9,10,和11,然后在良好的产率和纯度通过各树脂的切割产生6,7,和8 在二氯甲烷(DCM)中使用三氟乙酸(TFA)。
Synthesis of benzamide-benzothiazole conjugates via palladium-catalysed aminocarbonylation (hydrazinocarbonylation)
作者:Máté Gergely、László Kollár
DOI:10.1016/j.tet.2019.02.026
日期:2019.3
The palladium-catalysed aminocarbonylation of iodoarenes was investigated using 2-amino- and 2-hydrazinobenzothiazole as N-nucleophile. The reaction proved to be highly chemoselective in all cases: carboxamides and the corresponding carbohydrazides, obtained by the acylation at the nitrogen adjacent to the C-2 of the benzothiazole moiety, were obtained exclusively and isolated in moderate to high yields
Facile synthesis of N-acyl 2-aminobenzothiazoles by NHC-catalyzed direct oxidative amidation of aldehydes
作者:Sethulekshmy Premaletha、Arghya Ghosh、Sumi Joseph、Santhivardhana Reddy Yetra、Akkattu T. Biju
DOI:10.1039/c6cc08640c
日期:——
A mild, general, and high yielding synthesis of N-acyl 2-aminobenzothiazoles has been demonstrated by the N-heterocyclic carbene (NHC)-organocatalyzed direct amidation of aldehydes with 2-aminobenzothiazoles proceeding via the acyl azolium intermediates....
Access to Amide from Aldimine via Aerobic Oxidative Carbene Catalysis and LiCl as Cooperative Lewis Acid
作者:Guanjie Wang、Zhenqian Fu、Wei Huang
DOI:10.1021/acs.orglett.7b01195
日期:2017.7.7
Herein, an efficient route to amides from aldimines via aza-Breslow intermediates through aerobic oxidative carbenecatalysis with LiCl as a cooperative Lewis acid is described. Many of the obtained N-heteroarylamides feature biological activity. Ambient air was used as the sole oxidant and source of oxygen in this catalytically oxidative amidation. This method allows for a broad substrate scope and
Imidazolium-supported benzotriazole: an efficient and recoverable activating reagent for amide, ester and thioester bond formation in water
作者:S. M. Abdul Shakoor、Sunita Choudhary、Kiran Bajaj、Manoj Kumar Muthyala、Anil Kumar、Rajeev Sakhuja
DOI:10.1039/c5ra18749d
日期:——
An efficient and recyclable imidazolium-supported benzotriazole reagent (Im-CH2-BtH) as a novel synthetic auxiliary has been synthesized and its utility as a carboxyl group activating reagent via the formation of stable imidazolium-supported acyl benzotriazoles was explored for the synthesis of amides, esters and thioesters in water under microwave conditions. The reagent was reused five times without