A versatile and efficient palladium catalyzed domino reaction leading to a broad range of substituted 1-aminoindoles has been developed. The title compounds were prepared from 2-halo-phenylacetylenes and simple hydrazines in good to excellent yields in just a few hours under mild conditions.
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.