Mechanistic Studies of a Pd-Catalyzed Direct Arylation En Route to Beclabuvir: Dual Role of a Tetramethylammonium Cation and an Unusual Turnover-Limiting Step
作者:Chao Hang、Antonio Ramirez、Collin Chan、Yi Hsiao、Albert J. DelMonte、Eric M. Simmons
DOI:10.1021/acscatal.0c05533
日期:2021.3.5
arylpalladium acetate complex that undergoes C–H bond cleavage, and this equilibrium favors the former species. As a consequence, the Br/OAc exchange process becomes increasingly disfavored as the catalytic reaction progresses because of the liberation of bromide ions, but with TMAOAc as the base, the reaction can be efficiently driven forward by sequestration of bromide as the poorly soluble tetramethylammonium
报道了在向HCV NS5B抑制剂belclabuvir途中含吲哚的芳基溴化物分子内直接芳基化的机理研究。化学计量,动力学和计算研究的结合揭示了乙酸四甲基铵(TMAOAc)碱独特功效的起源,并揭示了四甲基铵阳离子的出乎意料的双重作用,以及这种分子内直接芳基化的不寻常的营业额限制步骤反应。芳基溴化钯的氧化加成配合物与经历了C–H键裂解的关键乙酸芳基钯的配合物处于平衡状态,这种平衡有利于前者。结果,由于溴离子的释放,随着催化反应的进行,Br / OAc交换过程变得越来越不利。但是以TMAOAc为碱,可通过螯合难溶的四甲基铵盐溴化物来有效地推进反应。通过可协同的金属化-去质子化过程进行的可逆的C–H键裂解事件,然后是限制营业额的还原消除反应,从而释放出环化产物。从这些研究中获得的知识使这种化学方法能够成功地在50 kg规模上执行,并且更广泛地讲,这项工作强调了化学计量的卤化物副产物可能对过渡金属催
[EN] NOVEL METHODS AND INTERMEDIATES FOR THE PREPARATION OF (4BS,5AR)-12-CYCLOHEXYL-N-(N,N-DIMETHYLSULFAMOYL)-3-METHOXY-5A-((1 R,5S) -3-METHYL-3,8-DIAZABICYCLO[3.2.1]OCTANE-8-CARBONYL)-4B,5,5A,6-TETRAHYDROBENZO [3,4]CYCLOPROPA[5,6]AZEPINO[1,2-A]INDOLE-9-CARBOXAMIDE<br/>[FR] NOUVEAUX PROCÉDÉS ET INTERMÉDIAIRES POUR LA PRÉPARATION DE |(4BS,5AR)-12-CYCLOHEXYL-N-(N,N-DIMÉTHYLSULFAMOYL)-3-|MÉTHOXY-5A-((1R,5S)-3-MÉTHYL-3,8-DIAZABICYCLO[3.2.1]OCTANE-8-CARBONYL)-4B,5,5A,|6-TÉTRA- HYDROBENZO[3,4]CYCLOPROPA[5,6]AZÉPINO[1,2-A]INDOLE-9-CARBOXAMIDE
申请人:BRISTOL MYERS SQUIBB CO
公开号:WO2014014885A1
公开(公告)日:2014-01-23
The present invention provides methods and intermediates for the preparation of (1aR,12bS)-8-cyclohexyl-11-fluoro-N-((1-methylcyclopropyl)sulfonyl)-1a-((3-methyl-3,8-diazabicyclo[3.2.1]oct-8-yl)carbonyl)-1,1a,2,12b-tetrahydrocyclopropa[d]indolo[2,1-a][2]benzazepine-5-carboxamide (formula I), including pharmaceutically acceptable salts. The compound has activity against hepatitis C virus (HCV) and may be useful in treating those infected with HCV.
本发明提供了制备(1aR,12bS)-8-环己基-11-氟-N-((1-甲基环丙基)磺酰基)-1a-((3-甲基-3,8-二氮杂双环[3.2.1]辛-8-基)羰基)-1,1a,2,12b-四氢-环丙基吲哚[2,1-a][2]苯并蒽啉-5-羧酰胺(化学式I)的方法和中间体,包括药用可接受的盐。该化合物对丙型肝炎病毒(HCV)具有活性,可能对感染HCV的患者有治疗作用。
NOVEL METHODS AND INTERMEDIATES FOR THE PREPARATION OF (4bS,5aR)-12-CYCLOHEXYL-N-(N,N-DIMETHYLSULFAMOYL)-3-METHOXY-5a-((1R,5S)-3-METHYL-3,8-DIAZABICYCLO[3.2.1]OCTANE-8-CARBONYL)-4b,5,5a,6-TETRAHYDROBENZO [3,4]CYCLOPROPA[5,6]AZEPINO[1,2-A]INDOLE-9-CARBOXAMIDE
申请人:BRISTOL-MYERS SQUIBB COMPANY
公开号:US20150133654A1
公开(公告)日:2015-05-14
The present invention provides methods and intermediates for the preparation of (1aR,12bS)-8-cyclohexyl-11-fluoro-N-((1-methylcyclopropyl)sulfonyl)-1a-((3-methyl-3,8-diazabicyclo[3.2.1]oct-8-yl)carbonyl)-1,1a,2,12b-tetrahydrocyclopropa[d]indolo[2,1-a][2]benzazepine-5-carboxamide (formula I), including pharmaceutically acceptable salts. The compound has activity against hepatitis C virus (HCV) and may be useful in treating those infected with HCV.
本发明提供了制备(1aR,12bS)-8-环己基-11-氟-N-((1-甲基环丙基)磺酰基)-1a-((3-甲基-3,8-二氮杂双环[3.2.1]辛-8-基)羰基)-1,1a,2,12b-四氢环丙并[2,1-a][2]苯并氮杂环己烷-5-羧酰胺(式I)的方法和中间体,包括药学上可接受的盐。该化合物对丙型肝炎病毒(HCV)具有活性,可能有助于治疗HCV感染者。