Pheromone synthesis—63 Synthesis of both the enantiomers of 2,3-dihydro-2- isopropyl-2,5-dimethylfuran, a sex specific compound in females of the beetle hylecoetus dermestoidesL
Pheromone synthesis—63 Synthesis of both the enantiomers of 2,3-dihydro-2- isopropyl-2,5-dimethylfuran, a sex specific compound in females of the beetle hylecoetus dermestoidesL
Two Asymmetric Syntheses of AMG 221, an Inhibitor of 11β-Hydroxysteroid Dehydrogenase Type 1
作者:Seb Caille、Sheng Cui、Tsang-Lin Hwang、Xiang Wang、Margaret M. Faul
DOI:10.1021/jo900287b
日期:2009.5.15
Two asymmetric syntheses of AMG 221 (2), an inhibitor of 11β-hydroxysteroid dehydrogenase type 1 (11β-HSD1) discovered in our laboratories, are reported. One of the syntheses utilizes chiral trimethylsilyl cyanohydrin 12 as starting material and the other utilizes its enantiomer ent-12. The displacement approach involves the conversion of 12 to 2 via a six-step sequence, occurs with net inversion of
Process for preparing oprtically active trimethyllactic acid and its ester
申请人:——
公开号:US20020035271A1
公开(公告)日:2002-03-21
The invention relates to a novel process for preparing optically active trimethyllactic acid and/or its esters by catalytic hydrogenation of trimethylpyruvic acid and/or its esters in the presence of noble metal complex catalysts containing phosphorus ligands.
(αMe)Hyv: chemo-enzymatic synthesis, and preparation and preferred conformation of model depsipeptidesElectronic supplementary information (ESI) available: analytical data. See http://www.rsc.org/suppdata/p2/b1/b107691b/
By a chemo-enzymatic approach we performed a large-scale, stereoselective synthesis of the Cα-methylated α-hydroxy acid L-(αMe)Hyv. We also prepared model depsipeptides based on this sterically demanding residue in combination with the α-amino acids L-Ala, L-Val, and Aib. From solution (FT-IR absorption and 1H NMR) and crystal-state (X-ray diffraction) conformational analyses we found that L-(αMe)Hyv forces depsipeptides to fold into right-handed β-turn/helical structures by analogy with the reported propensity of L-(αMe)Val, its α-amino acid counterpart.
ASYMMETRIC PROCESS FOR MAKING SUBSTITUTED 2-AMINO-THIAZOLONES
申请人:Caille Seb
公开号:US20110178307A1
公开(公告)日:2011-07-21
The invention provides two process for synthesizing substituted aminothiazolone compounds as inhibitors of 11-β-hydroxy steroid dehydrogenase type 1. The processes allow the stereoselective synthesis of the desired compounds without the use of stoichiometric amounts of chiral catalysts.
Heterocyclic derivatives as modulators of ion channels
申请人:Vertex Pharmaceuticals Incorporated
公开号:EP2308872A1
公开(公告)日:2011-04-13
The present invention relates to heterocyclic derivatives useful as inhibitors of ion channels. The invention also provides pharmaceutically acceptable compositions comprising the compounds of the invention and methods of using the compositions in the treatment of various disorders.