Rh(III)-Catalyzed Defluorinative [4 + 2] Annulation of <i>N</i>-Sulfonylarylamides with Ethyl 2-Diazo-3,3,3-trifluoropropanoate: Synthesis of 1,3,4-Functionalized Isoquinolines
作者:Haosheng Li、Mingjing Mei、Lei Zhou
DOI:10.1021/acs.orglett.2c03501
日期:2022.12.16
3,3-trifluoropropanoate as a nontraditional two-carbon reaction partner, a Rh(III)-catalyzed defluorinative [4 + 2] annulation for the synthesis of 1,3,4-functionalized isoquinolines was developed. The reaction proceeds by sequential C–H carbenoid insertion, dual C–F bond cleavage/annulation, and N– to O–sulfonyl migration. The resultant products were converted to diverse 1,3,4-trisubstituted isoquinolines
Co-Catalyzed Synthesis of <i>N</i>-Sulfonylcarboxamides from Carboxylic Acids and Sulfonyl Azides
作者:Yue Fang、Zheng-Yang Gu、Shun-Yi Wang、Jin-Ming Yang、Shun-Jun Ji
DOI:10.1021/acs.joc.8b01300
日期:2018.8.17
A Co-catalyzed effective synthesis of N-sulfonylcarboxamides from the reaction of carboxylicacids and organic azides in the presence of isocyanide has been developed. The protocol has the advantages of short time, low temperature, and being oxidant-free, which provides a new and simple approach for the synthesis of N-sulfonylcarboxamides in good to excellent yields with a broad substrate scope.
Controllable construction of isoquinolinedione and isocoumarin scaffolds <i>via</i> Rh<sup>III</sup>-catalyzed C–H annulation of <i>N</i>-tosylbenzamides with diazo compounds
An efficient protocol for the synthesis of isoquinolinediones by RhIII-catalyzed C–H activation/annulation/decarboxylation of N-tosylbenzamides with diazo compounds is reported.