The present invention provides an imidazopyridine compound represented by formula (I),
wherein R
1
and R
2
each independently represent a C
1-6
alkyl group et al; R
3
and R
4
each independently represent a hydrogen atom, a methyl et al; Ar
1
is a divalent substituent representing a monocyclic or bicyclic, 3- to 8-membered aromatic or aliphatic heterocyclic group et al; Ar
2
represents an aromatic carbocyclic group, or an aromatic heterocyclic group; W represents —(CH
2
)
m
et al, and m indicates an integer of from 0 to 10. This compound acts as a melanin concentrating hormone receptor antagonist, and is useful as treating agents for obesity.
Modular Access to Ketones via Cooperative NHC/Pd-Catalyzed C–H Alkylation of Aldehydes with Alkyl Bromides
作者:Ying Huang、You-Feng Han、Chun-Lin Zhang、Song Ye
DOI:10.1021/acscatal.3c02844
日期:2023.8.18
Direct C–H alkylation of aldehydes represents a straightforward and step-economy strategy for modular access to ketones. Herein, we report a direct C–H alkylation of aldehydes with alkyl bromides to generate ketones under cooperative NHC/Pd catalysis at room temperature. Secondary and the difficult-to-obtain tertiary alkyl-derived ketones could be prepared through this simple process under mild conditions
The present invention provides an imidazopyridine compound represented by formula (I),
wherein R1 and R2 each independently represent a C1-6 alkyl group et al; R3 and R4 each independently represent a hydrogen atom, a methyl et al; Ar1 is a divalent substituent representing a monocyclic or bicyclic, 3- to 8-membered aromatic or aliphatic heterocyclic group et al; Ar2 represents an aromatic carbocyclic group, or an aromatic heterocyclic group; W represents -(CH2)m et al, and m indicates an integer of from 0 to 10. This compound acts as a melanin concentrating hormone receptor antagonist, and is useful as treating agents for obesity.