Direct N-Alkylation and Kemp Elimination Reactions of 1-Sulfonyl-1<i>H</i>
-Indazoles
作者:Meng Tang、Bingjie Chu、Xiaowei Chang
DOI:10.1002/asia.201800741
日期:2018.8.16
The reactions of 1‐sulfonyl‐1H‐indazoles under basic conditions are discussed, and the direct N‐alkylation and Kemp elimination reactions of these compounds are reported. A series of 2‐(p‐tosylamino)benzonitriles and N‐alkyl indazoles were prepared in good yields. Moreover, the 2‐(p‐tosylamino)benzonitriles could be transformed into a diverse range of important derivatives in a one‐pot reaction. This
Transition metal catalyzed synthesis of 2H-indazoles
申请人:HALLAND Nis
公开号:US20100234601A1
公开(公告)日:2010-09-16
The present invention relates to a process for the regioselective synthesis of compounds of the formula I,
wherein R0; R1; R2; R3; R4; R5; A1; A2; A3; A4, Q and J have the meanings indicated in the claims. The present invention provides a direct transition metal catalyzed process to a wide variety of multifunctional 2H-indazoles or 2H-azaindazoles of the formula (I) from 2-halo-phenylacetylenes or (2-sulfonato)phenylacetylenes and monosubstituted hydrazines.