Access to 2-naphthols <i>via</i> Ru(<scp>ii</scp>)-catalyzed C–H annulation of nitrones with α-diazo sulfonyl ketones
作者:Lingheng Kong、Xi Han、Xingwei Li
DOI:10.1039/c9cc02949d
日期:——
Efficient synthesis of 2-naphthols was realized by Ru(II)-catalyzed C–H activation of aryl nitrones and intermolecular [3+3] annulation with α-diazo sulfonyl ketones under redox-neutral conditions. Easily available α-diazo sulfonyl ketones act as a three-carbon component in the reaction.
The bifunctional Lewis acidic ionicliquid (LAIL) catalyzed multicomponent arylsulfonation of phenols with aryl triazenes and DABSO was developed. By using LAILs as redox and Lewis acidic catalysts without any additional promoter or ligand through an N2 extrusion/SO2 insertion sequence, various aryl triazenes were transformed into aryl sulfonyl radicals by coupling with DABSO, and these were then coupled
开发了双功能路易斯酸性离子液体 (LAIL) 催化苯酚与芳基三氮烯和 DABSO 的多组分芳基磺化。通过使用 LAILs 作为氧化还原和路易斯酸性催化剂,无需任何额外的促进剂或配体,通过 N 2挤出/SO 2插入序列,各种芳基三氮烯通过与 DABSO 偶联转化为芳基磺酰基自由基,然后与苯氧基自由基偶联得到相应的二芳基砜以良好的收率。良好的官能团耐受性、克级反应和避免使用 SO 2气体进一步证明了该芳基磺化反应的实用性。
Balasubramanian; Baliah, Journal of the Indian Chemical Society, 1959, vol. 36, p. 391,393
作者:Balasubramanian、Baliah
DOI:——
日期:——
Thia-Fries rearrangement of aryl sulfonates in dry media under microwave activation
作者:Firouz Matloubi Moghaddam、Mohammad G. Dakamin
DOI:10.1016/s0040-4039(00)00402-0
日期:2000.4
An AlCl3-ZnCl2 mixture supported on silica gel is found to be a new efficient medium for the thia-Fries rearrangement of aryl sulfonates in solvent-free conditions under microwave dielectric heating. (C) 2000 Elsevier Science Ltd. All rights reserved.