恩他卡朋是儿茶酚-O-甲基转移酶(COMT)的新型抑制剂,可作为左旋多巴疗法的辅助治疗帕金森氏病。但是,口服他卡朋的生物利用度相对较低(29-46%)。在这项研究中,我们制备了更多的恩他卡朋的亲脂性酰基酯和酰氧基酰基酯,酰氧基烷基醚和烷氧基羰基酯,我们将它们评估为增强恩他卡朋口服生物利用度的潜在前药。所有衍生物均符合前药标准,并在人血清中体外释放他卡酮。在大鼠中进一步研究了entacapone的单新戊酰基(1a)和二新戊酰基(1b)酯的口服生物利用度。1b的亲脂性较高(在pH 7.4时,log Papp 4.0),但口服生物利用度较低(F = 0.6%),最可能是由于其低水溶性。在pH 7.4时,entacapone(1a)的单新戊酰基酯的亲脂性(log Papp 0.80)比entacapone(log Papp 0.18)高,同时保持水溶性等于entacapone。但是,与母体药物恩他
恩他卡朋是儿茶酚-O-甲基转移酶(COMT)的新型抑制剂,可作为左旋多巴疗法的辅助治疗帕金森氏病。但是,口服他卡朋的生物利用度相对较低(29-46%)。在这项研究中,我们制备了更多的恩他卡朋的亲脂性酰基酯和酰氧基酰基酯,酰氧基烷基醚和烷氧基羰基酯,我们将它们评估为增强恩他卡朋口服生物利用度的潜在前药。所有衍生物均符合前药标准,并在人血清中体外释放他卡酮。在大鼠中进一步研究了entacapone的单新戊酰基(1a)和二新戊酰基(1b)酯的口服生物利用度。1b的亲脂性较高(在pH 7.4时,log Papp 4.0),但口服生物利用度较低(F = 0.6%),最可能是由于其低水溶性。在pH 7.4时,entacapone(1a)的单新戊酰基酯的亲脂性(log Papp 0.80)比entacapone(log Papp 0.18)高,同时保持水溶性等于entacapone。但是,与母体药物恩他
The crystal structures of entacapone [(E)-2-cyano-N,N-diethyl-3-(3,4-dihydroxy-5-nitrophenyl)propenamide] and three of its acyl esters were solved. Entacapone, and its monopivaloate and diacetate derivatives, exist in the E-form while its dibenzoate derivative adopts the Z-form in the crystalline state. The ethyl substituents of the E-form are not freely rotating, as demonstrated by the broad signals in the H-1 and C-13 NMR spectra. The rotation barrier for the E-form was defined by the crystal structures, which show that free rotation of the ethyl substituents is blocked by the cyano-group. (C) 2001 Elsevier Science B.V. All rights reserved.
[EN] CATECHOLAMINE COMPOUNDS, COMPOSITIONS, AND FORMULATIONS, AND METHODS OF USING THE SAME<br/>[FR] COMPOSÉS DE CATÉCHOLAMINE, COMPOSITIONS, ET FORMULATIONS, ET MÉTHODES POUR LES UTILISER
申请人:CHADEAYNE ANDREW R
公开号:WO2011008675A2
公开(公告)日:2011-01-20
The invention relates to catecholamine compounds, compositions, and formulations comprising those compounds, and methods of treating Parkinson's disease with those compounds, compositions, and/or formulations.