13037-63-3Relevant articles and documents
Isothiocyanate-Directed Ortho-Selective Halogenation of Arenes via C–H Functionalization
Mandapati, Usharani,Pinapati, Srinivasarao,Tamminana, Ramana,Rameshraju, Rudraraju
, p. 418 - 423 (2017/11/29)
Abstract: Ortho-selective halogenation of arenes via C–H functionalization has been described under mild reaction conditions. In this reaction Cu(II)X2 was used as a halide source. It is a simple, general and efficient method for the synthesis of 2-halo aromatic isothiocyanates. All the reactions are carried out under optimized reaction conditions to provide their respective desired products in good to high yield. Graphical Abstract: We have developed a general, simple and efficient method for the synthesis of 2-halo arylisothiocyanates from isothiocyanates through ortho-selective halogenation under mild reaction conditions. Cu(II)X2 was used as a halide source for this methodology. All the reactions are carried out under optimized reaction conditions to provide their respective desired products in good to high yield. [Figure not available: see fulltext.].
Convenient synthesis of benzo[4,5]thiazolo[2,3-c][1,2,4]triazoles with 1 mol% CuCl2·2H2O as catalyst in water
Wen, Li-Rong,Li, Shou-Lei,Zhang, Jian,Li, Ming
, p. 1581 - 1588 (2015/03/18)
A convenient and efficient procedure for the synthesis of benzo[4,5]thiazolo [2,3-c][1,2,4]triazoles has been developed via a tandem intermolecular C-N bond and intramolecular C-S bond formation sequence from o-bromo-arylisothiocyanates and aroylhydrazides. A series of benzo[4,5]thiazolo[2,3-c][1,2,4]triazoles were provided in excellent overall yields with 1 mol% CuCl2·2H2O/1 mol% 1,10-phenanthroline as the catalyst and water as the solvent. This journal is
Structure-activity relationship of dihydroimidazo-, dihydropyrimido, tetrahydrodiazepino-[2,1-b]-thiazoles, and -benzothiazoles as an acylation catalyst
Okamoto, Sentaro,Sakai, Yuzo,Watanabe, Saki,Nishi, Shohei,Yoneyama, Aya,Katsumata, Hitomi,Kosaki, Yu,Sato, Rumi,Shiratori, Megumi,Shibuno, Misuzu,Shishido, Tsukasa
, p. 1909 - 1912 (2014/03/21)
Cyclic isothioureas 1, 2, 3, and 4 were synthesized through a four-step procedure from the corresponding ortho-bromoanilines 10 via Pd- or Cu-catalyzed cyclization-benzothiazole formation. Nonbenzo analogues 7, 8, and 9 were synthesized by a condensation reaction of cyclic thioureas 15 and α-bromoacetophenones 14. Investigations of the acylation reactions of 1-phenylethanol with acid anhydrides in the presence of these cyclic isothiourea catalysts revealed their structure-activity relationships. Remarkable electronic effects resulting from substituent(s) on a benzo or phenyl moiety and the influence of the size of the annulating ring were observed. Introduction of an electron-donating substituent(s) enhanced the reaction rate. A few substitution effects on chiral catalysts of type 3 and 7 were also studied.