Synthesis of 2-Thio-Substituted Benzothiazoles via a Domino Condensation/<i>S</i>-Arylation/Heterocyclization Process
作者:Liu Shi、Xiangqian Liu、Hui Zhang、Yongwen Jiang、Dawei Ma
DOI:10.1021/jo200535e
日期:2011.5.20
Condensation of carbon disulfide with thiols in the presence of K2CO3 generates carbonotrithioate salts in situ, which undergo coupling with 2-iodoanilines and subsequent intramolecular condensation and elimination under assistance of CuBr to afford 2-thio-substituted benzothiazoles. Both aliphatic and aromatic thiols are compatible with this process, delivering the corresponding heterocycles with
在K 2 CO 3存在下,二硫化碳与硫醇的缩合原位生成三硫代碳酸盐,将其与2-碘苯胺偶联,随后在CuBr的帮助下进行分子内缩合和消除,得到2-硫基取代的苯并噻唑。脂族和芳族硫醇均与该过程相容,从而提供具有良好多样性的相应杂环。
A Convenient Method for the Preparation of Alkyl Aryl Sulfides from Alcohols and (Chloromethylene)dimethylammonium Chloride
(Chloromethylene)dimethylammonium chloride (Vilsmeier reagent), prepared easily from DMF and oxalyl chloride, works as an efficient condensation reagent for the thioetherification of alcohols in on...
Takahashi et al., Yakugaku Zasshi/Journal of the Pharmaceutical Society of Japan, 1949, vol. 69, p. 289
作者:Takahashi et al.
DOI:——
日期:——
Synthesis of 2-<i>N</i>/<i>S</i>/<i>C</i>-Substituted Benzothiazoles via Intramolecular Cyclative Cleavage of Benzotriazole Ring
作者:Dhananjay Kumar、Bhuwan B. Mishra、Vinod K. Tiwari
DOI:10.1021/jo4024107
日期:2014.1.3
The synthesis of numerous 2-N/S/C-substituted benzothiazoles was achieved from substituted thiocarbonylbenzotriazoles via free-radical intramolecular cyclative cleavage of the benzotriazole ring in the presence of (TMS)3SiH and AIBN under mild conditions. The developed methodology demonstrates significant compatibility under microwave conditions and is important as it avoids the use of toxic metals
在温和条件下,在(TMS)3SiH和AIBN的存在下,通过苯并三唑环的自由基分子内环化裂解,由取代的硫代羰基苯并三唑实现了许多2-N / S / C-取代的苯并噻唑的合成。所开发的方法论证明了在微波条件下的显着兼容性,并且由于避免了使用有毒金属进行自由基环化,因此非常重要。
A Practical Access to Functionalized Alkyl Sulfinates
of aliphatic sulfinates. This cost-effective method involves the use of 2-mercaptobenzothiazole under mild conditions and exhibits good yields (up to 78% over three steps). This approach provides an access to a wide range of functionalized sulfinates. A good tolerance with respect to diverse functional groups (alkene, alkyne, ether, acetal) was also noted.