已经描述了一种有效且温和的 KO t Bu 促进的邻碘硫代苯胺的分子内 C-S 交叉偶联以及催化量的菲咯啉作为添加剂,用于方便地合成 2-取代苯并噻唑。该方法适用于获得多种 2-烷基和 2-芳基取代的苯并噻唑。单晶 XRD、DFT 计算、NMR 和 UV 研究表明,邻碘硫代苯胺单元之间的卤素键可能有助于电子转移过程。
2-Aminobenzenethiol, bound through its thiol function to the 2-chlorotrityl (Clt)-, trityl (Trt)-, 4-methyltrityl (Mtt)- and 4-methoxytrityl (Mmt)-resins, was acylated at the amino-function by aliphatic and aromatic acids. The obtained 2-N-acylaminobenzenethiols were cleaved from the resin by treatment with trifluoroacetic acid solutions in dichloromethane. The 2-N-acyl-aminobenzenethiols released from the resin were cyclised to the corresponding 2-substituted benzothiazoles, by standing in a solution of dithiothreitol in DMF or methanol for 1-3 h at room temperature. (C) 2001 Elsevier Science Ltd. All rights reserved.
Rauf, Abdul; Gangal, Saloni; Sharma, Shweta, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2008, vol. 47, # 4, p. 601 - 605
作者:Rauf, Abdul、Gangal, Saloni、Sharma, Shweta
DOI:——
日期:——
KO<sup><i>t</i></sup>Bu-Promoted Halogen-Bond-Assisted Intramolecular C–S Cross-Coupling of <i>o</i>-Iodothioanilides for the Synthesis of 2-Substituted Benzothiazoles
作者:Anuradha Nandy、Govindasamy Sekar
DOI:10.1021/acs.joc.1c02023
日期:2021.11.5
cross-coupling of ortho-iodothioanilides in conjunction with a catalytic quantity of phenanthroline as an additive has been described for the convenientsynthesis of 2-substituted benzothiazoles. The methodology is suitable for attaining a wide variety of 2-alkyl- and 2-aryl-substituted benzothiazoles. Single-crystal XRD, DFT calculations, NMR, and UV studies suggest that halogen bonds between the units
已经描述了一种有效且温和的 KO t Bu 促进的邻碘硫代苯胺的分子内 C-S 交叉偶联以及催化量的菲咯啉作为添加剂,用于方便地合成 2-取代苯并噻唑。该方法适用于获得多种 2-烷基和 2-芳基取代的苯并噻唑。单晶 XRD、DFT 计算、NMR 和 UV 研究表明,邻碘硫代苯胺单元之间的卤素键可能有助于电子转移过程。