The present invention provides a compound promoting osteogenesis. The present invention provides a compound having the following general formula (I)
wherein R1 is H or alkyl,
R2 is RaS-, RaO-, RaNH-, Ra(Rb)N- or cyclic amino, and
Ra and Rb are alkyl which may be substituted, cycloalkyl which may be substituted, or the like, or a pharmacologically acceptable salt thereof.
Synthesis of new and potent analogues of anti-tuberculosis agent 5-nitro-furan-2-carboxylic acid 4-(4-benzyl-piperazin-1-yl)-benzylamide with improved bioavailability
作者:Rajendra P. Tangallapally、Robin E.B. Lee、Anne J.M. Lenaerts、Richard E. Lee
DOI:10.1016/j.bmcl.2006.02.048
日期:2006.5
bioavailability, a new series of analogues was successfully synthesized using three modification schemes: replacement of the benzyl group on the piperazine C-ring with carbamate and urea functional groups; introduction of a nitrogen atom into the aromatic ring-B; and expansion of the ring-B to a bicyclic tetrahydroisoquinoline moiety. These modifications retained strong activity and in some case gained superior
[Problem to be Solved]The present invention provides a compound promoting osteogenesis. [Solution]
The present invention provides a compound having the following general formula (I)
wherein R
1
is H or alkyl,
R
2
is R
a
S—, R
a
O—, R
a
NH—, R
a
(R
b
)N— or cyclic amino, and
R
a
and R
b
are alkyl which may be substituted, cycloalkyl which may be substituted, or the like, or a pharmacologically acceptable salt thereof.
An improved synthesis of N-aryl and N-heteroaryl substituted homopiperazines—from conventional thermal conditions to scaling-up using microwave heating
An efficient Pd(0)-catalyzed Buchwald-Hartwig protocol for the facile preparation of N-aryl and N-heteroaryl substituted homopiperazines is described. The syntheses proceeded with aryl- and heteroaryl halides in high yields using X-Phos as best ligand. The C-N coupling products were prepared both under conventional as well as microwave heating conditions and examples for microwave-assisted upscaling are included in this study. (C) 2009 Elsevier Ltd. All rights reserved.