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Regioselective one pot synthesis of 2‐alkyl/aryl‐4 h ‐benzo[1,4] thiazine‐3‐one via microwave irradiation
Author(s) -
Kamila Sukanta,
Koh Benjamin,
Khan Omair,
Zhang Hongming,
Biehl Edward R.
Publication year - 2006
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570430632
Subject(s) - chemistry , thiazine , thiophenol , alkyl , regioselectivity , microwave irradiation , aryl , medicinal chemistry , proton nmr , stereochemistry , organic chemistry , catalysis
A series of 2‐alkyl/aryl‐4 H ‐benzo[1,4]thiazine‐3‐ones have been synthesized by microwave irradiation of ethyl‐2‐bromo‐2‐alkyl/aryl acetate and 2‐amino thiophenol in the presence of 1,8‐diazabicyclo‐[5.4.0] undec‐7‐ene and N ‐methylpiperidine. All compounds were characterized by 1 H NMR, 13 C NMR and elemental analyses, and by X‐ray crystallography in the case of 2‐methyl‐4 H ‐benzo[1,4]thiazin‐3‐one.