An object of the present invention is to provide to a compound and a pharmaceutical composition, which have excellent Syk-inhibitory activity. The present invention provides a nicotinamide derivative represented by the following formula (I) (wherein R
1
represents a halogen atom; R
2
represents a C
1-12
alkyl group, a C
2-12
alkenyl group, a C
2-12
alkynyl group, a C
3-8
cycloalkyl group, an aryl group, an ar-C
1-6
alkyl group or a heterocyclic group, each optionally having at least one substituent; R
3
represents an aryl group or a heterocyclic group each optionally having at least one substituent; and R
4
and R
5
each independently represent a hydrogen atom; and R
2
and R
4
may form a cyclic amino group optionally having at least one substituent together with the nitrogen atom to which they bind) or a salt thereof, and a pharmaceutical composition for use in the treatment of a Syk-related disease which comprises the nicotinamide derivative or a salt thereof.
Convenient Divergent Strategy for the Synthesis of TunePhos-Type Chiral Diphosphine Ligands and Their Applications in Highly Enantioselective Ru-Catalyzed Hydrogenations
作者:Xianfeng Sun、Le Zhou、Wei Li、Xumu Zhang
DOI:10.1021/jo702068w
日期:2008.2.1
convenient, divergent strategy for the synthesis of a series of modular and fine-tunable C3-TunePhos-type chiral diphosphineligands and their applications in highlyefficient Ru-catalyzed asymmetrichydrogenations were explored. Up to 97 and 99% ee values were achieved for the enantioselective synthesis of β-methyl chiral amines and α-hydroxy acid derivatives, respectively.