Cycloalkylalkanecarboxamides and their preparation and use
申请人:——
公开号:US20020019422A1
公开(公告)日:2002-02-14
The present invention relates to novel cycloalkylalkanecarboxamides of the formula I
1
where the substituents have the following meanings:
A is C
3
-C
6
-cycloalkyl;
R
1
is C
1
-C
6
-alkyl or C
2
-C
6
-alkenyl;
R
2
, R
3
and R
4
are hydrogen or, independently of this meaning, have one of the meanings of the radical R
1
;
n is 0 or 1;
Y is cyano or halogen;
W is phenyl, naphthyl or heteroaryl.
Novel Cyclopropyl β-Amino Acid Analogues of Pregabalin and Gabapentin That Target the α<sub>2</sub>-δ Protein
作者:Jacob B. Schwarz、Sian E. Gibbons、Shelley R. Graham、Norman L. Colbry、Peter R. Guzzo、Van-Duc Le、Mark G. Vartanian、Jack J. Kinsora、Susan M. Lotarski、Zheng Li、Melvin R. Dickerson、Ti-Zhi Su、Mark L. Weber、Ayman El-Kattan、Andrew J. Thorpe、Sean D. Donevan、Charles P. Taylor、David J. Wustrow
DOI:10.1021/jm0491086
日期:2005.4.1
As part of a program aimed at generating compounds with affinity for the alpha(2)-delta subunit of voltage-gated calcium channels, several novel beta-amino acids were prepared using an efficient nitroalkane-mediated cyclopropanation as a key step. Depending on the ester that was chosen, the target amino acids could be prepared in as few as three steps. The cyclopropyl amino acids derived from ketones proved to be potent binders of the alpha 2-beta subunit of voltage-gated calcium channels, but did not interact with the large neutral amino acid system L (leucine) transporter. Anticonvulsant effects were observed in vivo with compound 34 but only after intracerebroventricular (icv) administration, presumably due to inadequate brain concentrations of the drug being achieved following oral dosing. However, pregabalin 1 was active in the DBA/2 model after oral (and icv) dosing, supporting a hypothesis that active transport is a prerequisite for such zwitterionic species to cross the blood-brain barrier.
US6265447B1
申请人:——
公开号:US6265447B1
公开(公告)日:2001-07-24
US6410486B2
申请人:——
公开号:US6410486B2
公开(公告)日:2002-06-25
A Facile, Efficient and Solvent-Free Titanium (IV) Ethoxide Catalysed Knoevenagel Condensation of Aldehydes and Active Methylenes
作者:Manjunatha M. Ramaiah、Nanjunda Swamy Shivananju、Priya Babu Shubha
DOI:10.2174/1570178616666190401194641
日期:2020.1.7
convenient method for the preparation of α,β-unsaturated compounds using both conventional and microwave irradiation methods. An efficient and solvent free Knoevenagel condensation between aldehydes and active methylenes was developed using titanium ethoxide. The procedure proved to be successful with a wide range of substrates such as aromatic, aliphatic and heterocyclic aldehydes and various active methylenes