When Hydrazonoyl Chlorides Meet Terminal Alkynes: Regioselective Copper(I)-Catalysed "Click" Sequential Reactions to 5-Substituted Pyrazoles
作者:Giorgio Molteni
DOI:10.3987/com-20-14268
日期:——
In the presence of catalytic amounts of copper(I) salts, terminal alkynes underwent the formation of copper(I) acetylides that enabled their nucleophilic addition onto hydrazonoyl chlorides followed by spontaneous cyclisation of the resulting alkynylhydrazone intermediate. This sequential reaction sequence was exploited as a facile and regioselective synthesis of 1,3,5-substituted pyrazoles. A catalytic
Synthesis and Herbicidal Activity of 1,5-Diarylpyrazole Derivatives.
作者:Noriaki KUDO、Satoru FURUTA、Misa TANIGUCHI、Takeshi ENDO、Kazuo SATO
DOI:10.1248/cpb.47.857
日期:——
A series of diarylpyrazolecarboxylates and carboxamides were prepared, and their herbicidal activities were investigated. Some of these compounds showed noticeable pre-emergent herbicidal activities against various kinds of weeds. Among the synthesized compounds, methyl 4-chloro-1-(2, 5-difluorophenyl)-5-(4-flurophenyl)-pyzazole-3-carboxylate 19t exhibited good activity. Diarylimidazolecarboxylates and carboxamides were also synthesized, but they did not show any herbicidal activities.
Discovery of pyrazole‐carbohydrazide with indole moiety as tubulin polymerization inhibitors and anti‐tumor candidates
作者:Ruo‐Jun Man、Tian Lu、Chi‐Chong Zheng、Tong Li、Meng‐Ke Wu、Dong‐Dong Li、Xue‐Mei He
DOI:10.1002/ddr.22016
日期:2023.2
derivatives A1-A25 were synthesized, and their biological activity on tubulinpolymerization inhibition and mitotic catastrophe was evaluated. For introducing indole group to CA-4 pattern, the carbohydrazide linker was used for the first time. As the top hit, A18 suggested notable antiproliferation efficacy and tubulinpolymerization inhibitory activity. Inferring comparable antitubulin effect with the