Synthesis of 2-piperidinecarboxylic acid derivatives as potential anticonvulsants
摘要:
A variety of 2-piperidinecarboxamides were synthesized and evaluated for anticonvulsant activity using the MES and sc PTZ tests in mice and rats. Neurotoxicity was determined by the rotorod test. Several N-(benzyl)-2-piperidinecarboxamides exhibited potent MES activity in mice [2-CF3 14, ED50 = 29 mg/kg; 3-F 16, ED50 = 31 mg/kg; and 3-CF3 17, ED50 = 24 mg/kg]. The most active compounds in the MES test in mice were the 2,6-dimethylanilides [(R,S)-34, ED50 = 5.8 mg/kg; (R)-35, ED50 = 5.7 mg/kg; and (S)-36, ED50 = 14.8 mg/kg]. The enantiomer (S)-36 was about two-fold less potent in the MES test than (R)-35 and also was less neurotoxic. Acylation of the piperidine ring nitrogen of 12 and 34 led to a decrease in the MES activity. In the N-(alpha-methylbenzyl)-2-piperidine-carboxamides, the stereochemistry at either the 2-position of the piperidine ring or at the alpha-position of the N-(alpha-methylbenzyl) group does not significantly affect MES activity. (C) Elsevier, Paris.
Synthesis of 2-piperidinecarboxylic acid derivatives as potential anticonvulsants
摘要:
A variety of 2-piperidinecarboxamides were synthesized and evaluated for anticonvulsant activity using the MES and sc PTZ tests in mice and rats. Neurotoxicity was determined by the rotorod test. Several N-(benzyl)-2-piperidinecarboxamides exhibited potent MES activity in mice [2-CF3 14, ED50 = 29 mg/kg; 3-F 16, ED50 = 31 mg/kg; and 3-CF3 17, ED50 = 24 mg/kg]. The most active compounds in the MES test in mice were the 2,6-dimethylanilides [(R,S)-34, ED50 = 5.8 mg/kg; (R)-35, ED50 = 5.7 mg/kg; and (S)-36, ED50 = 14.8 mg/kg]. The enantiomer (S)-36 was about two-fold less potent in the MES test than (R)-35 and also was less neurotoxic. Acylation of the piperidine ring nitrogen of 12 and 34 led to a decrease in the MES activity. In the N-(alpha-methylbenzyl)-2-piperidine-carboxamides, the stereochemistry at either the 2-position of the piperidine ring or at the alpha-position of the N-(alpha-methylbenzyl) group does not significantly affect MES activity. (C) Elsevier, Paris.
This invention relates to sulfamides of formula (I) ##STR1## that are inhibitors of metalloproteases, pharmaceutical compositions containing them, methods for their use and methods for preparing these compounds.
N-substituted azaheterocyclic carboxylic acids and esters thereof
申请人:Novo Nordisk A/S
公开号:US06239148B1
公开(公告)日:2001-05-29
The present invention relates to novel N-substituted azaheterocyclic carboxylic acids and esters thereof in which a substituted alkyl chain forms part of the N-substituent or salts thereof, to methods for their preparation, to compositions containing them, and to their use for the clinical treatment of painful, hyperalgesic and/or inflammatory conditions in which C-fibers play a pathophysiological role by eliciting neurogenic pain or inflammation.
N-substituted azaheterocyclic carboxylic acids and their use
申请人:Novo Nordisk A/S
公开号:US06613791B1
公开(公告)日:2003-09-02
N-substituted azaheterocycyclic carboxylic acids and esters thereof of the formula I
wherein Z, X, R1, R2 and r are defined in the specification. Compositions thereof and methods for preparing the compounds are disclosed. The compounds are useful for clinical treatment of painful, hyperalgesic and/or inflammatory conditions in which C-fibers play a pathophysiological role by eliciting neurogenic pain or inflammations.
Use of N-Fmoc amino acid chlorides and activated 2-(fluorenylmethoxy)-5(4H)-oxazolones in solid-phase peptide synthesis. Efficient syntheses of highly N-alkylated cyclic hexapeptide oxytocin antagonists related to L-365,209
作者:Debra S. Perlow、Jill M. Erb、Norman P. Gould、Roger D. Tung、Roger M. Freidinger、Peter D. Williams、Daniel F. Veber
DOI:10.1021/jo00042a016
日期:1992.7
Fmoc amino acid chlorides have been shown to be useful reagents in the solid-phase synthesis of hexapeptides containing up to four sequential secondary amino acids. The oxytocin antagonist cyclo-(D-Phe-Ile-D-Pip-Pip-D-(N-Me)Phe-Pro) (1) was prepared in 70% overall yield starting from Boc-L-Pro-O-(PAM)-resin. In the synthesis of 1, the high reactivity of Fmoc-L-pipecolic acid chloride used in the di- to tripeptide step averted diketopiperazine formation seen with active ester couplings. The use of Fmoc-amino acid chlorides in the subsequent couplings provided a rapid method for assembly of the linear hexapeptide. The two potent cyclic hexapeptide oxytocin antagonists L-366,682 and L-366,948 were prepared in 45-48% overall yield on a 20 mmol scale using the methodology developed for the synthesis of 1. A particularly difficult coupling was encountered that involved acylation of a sterically hindered N(delta)-Cbz-piperazic acid N-terminus with Fmoc-L-isoleucine. Excess Fmoc-L-isoleucine acid chloride in the presence of tertiary amine base gave only 30% conversion. The efficiency was improved to 76% by utilizing the acid chloride with AgCN in toluene. Further investigation revealed that this combination of reagents produces an activated form of the isoleucine 2-alkoxy-5(4H)-oxazolone derivative.
McFarlane, Andrew K.; Thomas Gareth; Whiting, Andrew, Journal of the Chemical Society. Perkin transactions I, 1995, # 21, p. 2803 - 2810
作者:McFarlane, Andrew K.、Thomas Gareth、Whiting, Andrew