Studies on antidiabetic agents. IX. A new aldose reductase inhibitor, AD-5467, and related 1,4-benzoxazine and 1,4-benzothiazine derivatives: Synthesis and biological activity.
Regioselective one pot synthesis of 2-alkyl/aryl-4<i>h</i>-benzo[1,4] thiazine-3-one<i>via</i>microwave irradiation
作者:Sukanta Kamila、Benjamin Koh、Omair Khan、Hongming Zhang、Edward R. Biehl
DOI:10.1002/jhet.5570430632
日期:2006.11
A series of 2-alkyl/aryl-4H-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 1H NMR, 13C NMR and elemental analyses, and by X-ray crystallography in the case of 2-methyl-4H-benzo[1,4]thiazin-3-one.
在存在下,通过微波辐射乙基-2-溴-2-烷基/乙酸芳基酯和2-氨基苯硫酚合成了一系列2-烷基/芳基-4 H-苯并[1,4]噻嗪-3-酮1,8-二氮杂双环-[5.4.0]十一烷基-7-烯和N-甲基哌啶。对于2-甲基-4 H-苯并[1,4]噻嗪-3-酮,所有化合物的特征在于1 H NMR,13 C NMR和元素分析,以及X射线晶体学。
[Omim][NO<sub>3</sub>], a Green and Base-Free Medium for One-Pot Synthesis of Benzothiazinones at Room Temperature
Abstract A general and efficient room-temperature procedure is developed for high-yield synthesis of 2H-benzo[b][1,4]thiazin-3(4H)-onederivatives in one pot from the reaction of 2-aminothiophenols with 2-bromoalkanoates in ionicliquid [bmim]NO3 without the use of any catalyst, base, or additive. Products were obtained in good yields by simple extraction with Et2O followed by evaporation of the volatile
[DE] SUBSTITUIERTE HETEROCYCLEN UND DEREN VERWENDUNG IN ARZNEIMITTELN<br/>[EN] SUBSTITUTED HETEROCYCLES AND THEIR USE IN MEDICAMENTS<br/>[FR] HETEROCYCLIQUES SUBSTITUES ET LEUR UTILISATION DANS DES MEDICAMENTS
申请人:SCHERING AKTIENGESELLSCHAFT
公开号:WO1998050372A1
公开(公告)日:1998-11-12
(DE) Es werden Verbindungen der Formel (I) beschrieben, deren Herstellung und Verwendung in Arzneimitteln.(EN) The invention relates to compounds of formula (I), to the production of said compounds and their use in medicaments.(FR) L'invention concerne des composés de la formule (I), leur production et leur utilisation dans des médicaments.
A solvent-free procedure was developed for the reaction of 2-aminothiophenols with 2-bromoalkanoates, where KF-Al2O3 support and ball milling cooperatively lead to a green and efficient synthesis of several benzothiazinone derivatives in good to excellent yields. The catalyst could be recycled in further reactions while maintaining its activity. (C) 2015 Elsevier Ltd. All rights reserved.
Synthesis and antimicrobial activity of some 2-alkyl-2H-1,4-benzothiazin-3(4H)-ones and 2-alkylbenzo[d]imidazolo[2,1-b]-thiazolidin-3-ones
作者:M. Koóš
DOI:10.1007/bf00812716
日期:1994.8
Sodium 2-aminothiophenoxide (1) reacts with ethyl 2-bromoalkanoates (2) under direct cyclization to form 2-alkyl-2H-1,4-benzothiazin-3(4H)-ones (3). Reaction of the sodium salt of 2-mercaptobenzimidazole (4) with 2 or 2-bromoalkanoic acids (5) affords only S-alkylated products (6 or 7, respectively). The cyclization products - 2-alkylbenzo[d] imidazolo[2,1-b]thiazolidin-3-ones (8)- can be obtained only from the corresponding 2-(2-benzimidazolylthio)alkanoic acids (7) by the action of acetic anhydride. Both compounds 3 and 8 exhibit only moderate antimicrobial activity against some gram-positive bacteria.