Electrooxidative cyclization of benzylideneaminothiophenols to the corresponding 2-arylbenzothiazoles

被引:39
作者
Okimoto, Mitsuhiro [1 ]
Yoshida, Takashi [1 ]
Hoshi, Masayuki [1 ]
Hattori, Kazuyuki [1 ]
Komata, Masashi [1 ]
Tomozawa, Kenta [1 ]
Chiba, Tomohito [1 ]
机构
[1] Kitami Inst Technol, Dept Appl & Environm Chem, Kitami, Hokkaido 0908507, Japan
关键词
D O I
10.3987/COM-07-11195
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
Several benzylideneaminothiophenols were electrochemically oxidized in methanol containing sodium acetate as the supporting electrolyte, to afford the corresponding 2-arylbenzothiazols. The reaction proceeded via intramolecular cyclization involving the formation of a new bond between the benzylic carbon of the substrate and the sulfur of the thiol group. Based on the yields, room temperature and the use of two equivalents of sodium acetate relative to the substrate as the supporting electrolyte were found to be the optimal reaction conditions. The electrooxidation presumably involves a two-electron oxidation process.
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收藏
页码:35 / 42
页数:8
相关论文
共 41 条
[1]   SYNTHESIS OF 2-SUBSTITUTED BENZOTHIAZOLES FROM 2-FLUOROPHENYLISOTHIOCYANATE [J].
ARES, JJ .
SYNTHETIC COMMUNICATIONS, 1991, 21 (05) :625-633
[2]   Novel synthesis of 2-arylbenzothiazoles - Microwave-activated electron transfer [J].
BenAlloum, A ;
Bakkas, S ;
Soufiaoui, M .
TETRAHEDRON LETTERS, 1997, 38 (36) :6395-6396
[3]   RILUZOLE PREVENTS MPTP-INDUCED PARKINSONISM IN THE RHESUS-MONKEY - A PILOT-STUDY [J].
BENAZZOUZ, A ;
BORAUD, T ;
DUBEDAT, P ;
BOIREAU, A ;
STUTZMANN, JM ;
GROSS, C .
EUROPEAN JOURNAL OF PHARMACOLOGY, 1995, 284 (03) :299-307
[4]   Synthesis of 2-substituted-benzothiazoles by palladium-catalyzed intramolecular cyclization of o-bromophenylthioureas and o-bromophenylthioamides [J].
Benedí, C ;
Bravo, F ;
Uriz, P ;
Fernández, E ;
Claver, C ;
Castillón, S .
TETRAHEDRON LETTERS, 2003, 44 (32) :6073-6077
[5]   The development of the antitumour benzothiazole prodrug, Phortress, as a clinical candidate [J].
Bradshaw, TD ;
Westwell, AD .
CURRENT MEDICINAL CHEMISTRY, 2004, 11 (08) :1009-1021
[6]   2-(4-aminophenyl)benzothiazoles: novel agents with selective profiles of in vitro anti-tumour activity [J].
Bradshaw, TD ;
Wrigley, S ;
Shi, DF ;
Schultz, RJ ;
Paull, KD ;
Stevens, MFG .
BRITISH JOURNAL OF CANCER, 1998, 77 (05) :745-752
[7]   1-METHYL-2-PYRROLIDINONE - A WELL-ADAPTED SOLVENT IN THE BENZOTHIAZOLES SYNTHESIS [J].
BREMBILLA, A ;
ROIZARD, D ;
LOCHON, P .
SYNTHETIC COMMUNICATIONS, 1990, 20 (21) :3379-3384
[8]   An efficient conversion of phenolic esters to benzothiazoles under mild and virtually neutral conditions [J].
Chakraborti, AK ;
Rudrawar, S ;
Kaur, G ;
Sharma, L .
SYNLETT, 2004, (09) :1533-1536
[9]   An efficient synthesis of benzothiazoles by direct condensation of carboxylic acids with 2-aminothiophenol under microwave irradiation [J].
Chakraborti, AK ;
Selvam, C ;
Kaur, G ;
Bhagat, S .
SYNLETT, 2004, (05) :851-855
[10]  
Chari MA, 2006, J INDIAN CHEM SOC, V83, P291