- Synthesis, biological evaluation, and pharmacokinetic study of prolyl-1-piperazinylacetic acid and prolyl-4-piperidinylacetic acid derivatives as VLA-4 antagonists
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A series of prolyl-1-piperazinylacetic acid and prolyl-4-piperidinylacetic acid derivatives were synthesized and evaluated for their activity as VLA-4 antagonists. Of 22 compounds synthesized, 19 compounds showed potent activity with low nanomolar IC50 values. In addition, the representative compounds 11o and 11p with a hydroxy group in the pyrrolidine ring showed moderate plasma clearance in rats (11o, 30 ml/min/kg and 11p, 21 ml/min/kg) and in dogs (11o, 12 ml/min/kg and 11p, 9 ml/min/kg).
- Chiba, Jun,Takayama, Gensuke,Takashi, Tohru,Yokoyama, Mika,Nakayama, Atsushi,Baldwin, John J.,McDonald, Edward,Moriarty, Kevin J.,Sarko, Christopher R.,Saionz, Kurt W.,Swanson, Robert,Hussain, Zahid,Wong, Angela,MacHinaga, Nobuo
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p. 2725 - 2746
(2007/10/03)
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- Synthesis of (2R,3R,4S)-2-hydroxymethylpyrrolidine-3,4-diol from (2S)-3,4-dehydroproline derivatives
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(2R,3R,4S)-2-Hydroxymethylpyrrolidine-3,4-diol (1,4-dideoxy-1,4-imino-D-ribitol) was synthesized in five steps from N-protected (2S)-3,4-dehydroproline methyl esters.The stereoselective reaction of osmium tetraoxide with dehydroproline derivatives gave hi
- Goli, Deepa M.,Cheesman, Bruce V.,Hassan, Mohamed E.,Lodaya, Rita,Slama, James T.
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p. 219 - 242
(2007/10/02)
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- The preparation of (S)-3,4-dehydroproline from (2S,4R)-4-hydroxyproline
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(2S,4R)-N-benzyloxycarbonyl-4-tosyloxyproline methyl ester, readily prepared from commercially available (2S,4R)-N-benzyloxycarbonyl-4-hydroxyproline, was converted to (S)-3,4-dehydroproline of high enantiomeric purity by a process which involved a highly regioselective phenylselenoxide elimination to introduce the olefinic function.
- Rueeger, Heinrich,Benn, M. H.
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p. 2918 - 2920
(2007/10/02)
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