The enantioselective synthesis of the potent dopamine D1 agonist (1R,3S)-3-(1'-adamantyl)-1-(aminomethyl)-3,4-dihydro-5,6-dihydroxy-1H-2-benzopyran (A77636)
摘要:
The synthesis of both enantiomers of the title compound is described. The corresponding racemic compound (+/-)-1 was previously shown to be a highly potent and selective dopamine Dl agonist. Key to the synthesis of the enantiomers was the oxazaborolidine-catalyzed asymmetric reduction of the alpha-bromomethyl ketone 12 which led to the optically enriched epoxide 7. An aryllithium addition to the epoxide followed by a diastereospecific cyclization to the isochroman system furnished compound 17, which was deprotected to afford (-)-1 with >99.5% optical purity.
Chiral Epoxides via Borane Reduction of 2-Haloketones Catalyzed by Spiroborate Ester: Application to the Synthesis of Optically Pure 1,2-Hydroxy Ethers and 1,2-Azido Alcohols
作者:Kun Huang、Haiyang Wang、Viatcheslav Stepanenko、Melvin De Jesús、Carilyn Torruellas、Wildeliz Correa、Margarita Ortiz-Marciales
DOI:10.1021/jo102294j
日期:2011.3.18
with 10% spiroaminoborate ester 1 as catalyst is described. By a simple basic workup of 2-halohydrins, optically active epoxides are obtained in high yield and with excellent enantiopurity (up to 99% ee). Ring-opening of oxiranes with phenoxides or sodium azide is investigated under different reaction conditions affording nonracemic 1,2-hydroxy ethers and 1,2-azido alcohols with excellent enantioselectivity
NOVEL ALKYLAMINO DERIVATIVES AS SIGMA 2 SELECTIVE LIGANDS
申请人:MITSUBISHI CHEMICAL CORPORATION
公开号:EP0777660A1
公开(公告)日:1997-06-11
[EN] NOVEL ALKYLAMINO DERIVATIVES AS SIGMA 2 SELECTIVE LIGANDS<br/>[FR] NOUVEAUX DERIVES ALKYLAMINO UTILISES COMME LIGANDS SELECTIFS SIGMA 2
申请人:MITSUBISHI CHEMICAL CORPORATION
公开号:WO1996005185A1
公开(公告)日:1996-02-22
(EN) The present invention relates to novel alkylamino derivatives of formula (I). These compounds exhibit a high selectivity and a high affinity for sigma 2 receptor and therefore are useful in the treatment of central nervous system disorders as well as other disorders modulated by this receptor.(FR) L'invention porte sur de nouveaux dérivés alkylamino de formule (I). Ces composés manifestent une sélectivité élevée et une forte affinité pour le récepteur sigma 2; ils se révèlent ainsi utiles pour le traitement de perturbations du système nerveux central ainsi que d'autres perturbations modulées par ce récepteur.
Synthesis of enantiopure 1,2-azido and 1,2-amino alcohols via regio- and stereoselective ring-opening of enantiopure epoxides by sodium azide in hot water
作者:Hai-Yang Wang、Kun Huang、Melvin De Jesús、Sandraliz Espinosa、Luis E. Piñero-Santiago、Charles L. Barnes、Margarita Ortiz-Marciales
DOI:10.1016/j.tetasy.2015.12.002
日期:2016.2
A practical and convenient method for the efficient and regio- and stereoselective ring-opening of enantiopure monosubstituted epoxides by sodium azide under hydrolytic conditions is reported. The ring-opening of enantiopure styryl and pyridyl (S)-epoxides by N3 - in hot water takes place preferentially at the internal position with complete inversion of configuration to produce (R)-2-azido ethanols
The enantioselective synthesis of the potent dopamine D1 agonist (1R,3S)-3-(1'-adamantyl)-1-(aminomethyl)-3,4-dihydro-5,6-dihydroxy-1H-2-benzopyran (A77636)
作者:Michael P. DeNinno、Richard J. Perner、Howard E. Morton、Stanley DiDomenico
DOI:10.1021/jo00052a025
日期:1992.12
The synthesis of both enantiomers of the title compound is described. The corresponding racemic compound (+/-)-1 was previously shown to be a highly potent and selective dopamine Dl agonist. Key to the synthesis of the enantiomers was the oxazaborolidine-catalyzed asymmetric reduction of the alpha-bromomethyl ketone 12 which led to the optically enriched epoxide 7. An aryllithium addition to the epoxide followed by a diastereospecific cyclization to the isochroman system furnished compound 17, which was deprotected to afford (-)-1 with >99.5% optical purity.