- A novel synthesis of 2-alkylthiobenzothiazoles and 2-alkylthiobenzoxazoles
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3H-Benzothiazole-2-thione and 3H-benzoxazole-2-thione were selectively S-alkylated by use of O-alkylisoureas as the alkylating reagents. The reactions could be performed under mild reaction conditions in short reaction times, and high yields were obtained using O-primary-alkylisoureas, whereas low yields were obtained with sec-and tert-alkylisoureas.
- Yu, Yanfei,Li, Zhengning,Jiang, Lan
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experimental part
p. 632 - 640
(2012/06/01)
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- Alkylation of SH-heterocycles with diethyl phosphite using tetrachloroethylene as an efficient solvent
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Treatment of mercapto-heterocyclic compounds with diethyl phosphite in the presence of 4-dimethylaminopyridine (DMAP) in tetrachloroethylene has given the S-ethylated product in good yields and high chemoselectivity. This procedure is compatible with a wide range of SH-compounds such as 1,3,4-oxadiazole-2-thiol, 1,3,4-thiadiazole-2-thiol, benzo[d]thiazole-2-thiol, and substituted benzenethiol. Copyright
- Quan, Zheng-Jun,Ren, Rong-Guo,Da, Yu-Xia,Zhang, Zhang,Wang, Xi-Cun
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experimental part
p. 653 - 658
(2011/12/15)
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- REACTION OF (2-BENZOTHIAZOLYL)-SULFENAMIDES WITH P-CONTAINING REAGENTS
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The title reaction was investigated to find that only substitution reaction on amino group occured when (2-benzothiazoly)sulfenamides 1 reacted with P(NR2)3, whereas the treatment of 1 with (RO)P(NR2)2 gave derivatives of phosphorodiamidothioic acid together with 2-alkylthiobenzothiazole and its isomer in addition to substitution products, and no substitution products obtained when N-substituted analogues of 1 were treated similarly.
- Zhang, Jing-Lin,Ma, Xiao-Bo
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- An Unusual S- and N-Alkylation of Mercapto Substituted Heterocycles with O,O-Dialkyl Chlorophosphate/Thiophosphate
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The reaction of different mercapto substituted heterocycles with O,O-dialkyl chlorophosphate or thiophosphates, gave the corresponding S- and N- alkylated derivatives instead of the expected phosphorylated products.
- Rani, B. Radha,Bhalerao, U.T.,Rahman, M.F.
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p. 3045 - 3052
(2007/10/02)
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