3′-硝基-4′-苄氧基-2-溴苯乙酮是福莫特罗的关键中间体,福莫特罗是一种长效的选择性肾上腺素β2受体激动药。该药物具有支气管扩张作用,并且其效果呈剂量依赖关系,能够增加第1秒用力呼气量(FEV1)、用力肺活量(FVC)和呼气峰流速(PER)。
制备 步骤一:在反应瓶中依次加入1000毫升乙腈、150克3-硝基-4-羟基苯乙酮以及100克碳酸钾,然后滴加100克溴化苄。将温度升至70°C并搅拌反应;反应结束后,浓缩反应液,将反应液加入水中,过滤、水洗、烘干,得到210克中间体1,收率为93%。
步骤二:将200克中间体1加入到1000毫升二氯甲烷中,加入277克三甲基苯基三溴化铵。升温至30°C,反应4小时后浓缩,将残留液加入水中,过滤、水洗、烘干,得到253克3′-硝基-4′-苄氧基-2-溴苯乙酮,收率为98%。
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
4-苄氧基-3-硝基苯乙酮 | 4-benzyloxy-3-nitroacetophenone | 14347-05-8 | C15H13NO4 | 271.273 |
4'-羟基-3'-硝基苯乙酮 | 4'-hydroxy-3'-nitroacetophenone | 6322-56-1 | C8H7NO4 | 181.148 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 4-benzyloxy-3-nitrophenyl glyoxal | 74733-74-7 | C15H11NO5 | 285.256 |
—— | (+/-)-2-bromo-1-(4-benzyloxy-3-nitrophenyl)ethanol | 299964-35-5 | C15H14BrNO4 | 352.184 |
(S)-1-(4-苄氧基-3-硝基苯基)-2-溴乙醇 | (S)-1-(4-(benzyloxy)-3-nitrophenyl)-2-bromoethanol | 193761-53-4 | C15H14BrNO4 | 352.184 |
(R)-1-(4-苄氧基-3-硝基苯基)-2-溴乙醇 | (R)-2-bromo-1-(4-benzyloxy-3-nitrophenyl)ethanol | 188690-82-6 | C15H14BrNO4 | 352.184 |
—— | ω-(dibenzylamino)-4-benzyloxy-3-nitroacetophenone | 173283-38-0 | C29H26N2O4 | 466.536 |
(R)-2-(4-(苄氧基)-3-硝基苯基)环氧乙烷 | (R)-4-benzyloxy-3-nitrostyrene oxide | 188730-94-1 | C15H13NO4 | 271.273 |
—— | (S)-4-benzyloxy-3-nitrostyrene oxide | 188730-96-3 | C15H13NO4 | 271.273 |
1-(4-苄氧基-3-硝基)苯基环氧乙烷 | 2-(3-benzyloxy-4-nitrophenyl)oxirane | 51582-41-3 | C15H13NO4 | 271.273 |
—— | 2-benzyloxy-5-vinylnitrobenzene | 515152-69-9 | C15H13NO3 | 255.273 |
—— | (R)-4-benzyloxy-3-nitro-α-(N-benzyl-N-(1-methyl-2-p-methoxyphenylethyl)amino)acetophenone | 1198769-18-4 | C32H32N2O5 | 524.616 |
—— | 1R)-1-[4-(benzyloxy)-3-nitrophenyl]-2-{[(2R)-1-(4-methoxyphenyl)propan-2-yl]amino}ethanol | 245759-61-9 | C25H28N2O5 | 436.508 |
—— | 1-(4-benzyloxy-3-nitrophenyl)-2-dibenzylaminoethanol | 173283-39-1 | C29H28N2O4 | 468.552 |
—— | 4-[2-[Benzyl-[2-hydroxy-2-(3-nitro-4-phenylmethoxyphenyl)ethyl]amino]ethyl]phenol | 630127-03-6 | C30H30N2O5 | 498.579 |
—— | 2-[benzyl-(5,6-diethyl-indan-2-yl)-amino]-1-(4-benzyloxy-3-nitro-phenyl)-ethanone | 312753-82-5 | C35H36N2O4 | 548.682 |
—— | (R,R)-3-nitro-α-[[[2-(4-methoxyphenyl)-1-methylethyl](phenylmethyl)amino]methyl]-4-(phenylmethoxy)-benzenemethanol | 245759-65-3 | C32H34N2O5 | 526.632 |
—— | (R)-2-{Benzyl-[(S)-2-(4-methoxy-phenyl)-1-methyl-ethyl]-amino}-1-(4-benzyloxy-3-nitro-phenyl)-ethanol | 1279038-03-7 | C32H34N2O5 | 526.632 |
—— | (1S)-1-(3-amino-4-benzyloxyphenyl)-2-bromoethan-1-ol | 1122063-33-5 | C15H16BrNO2 | 322.202 |
—— | (1R)-1-[3-amino-4-(benzyloxy)phenyl]-2-bromoethanol | 333796-54-6 | C15H16BrNO2 | 322.202 |
—— | N-(2-(benzyloxy)-5-((S)-2-bromo-1-hydroxyethyl)phenyl)formamide | 306966-56-3 | C16H16BrNO3 | 350.212 |
(R)-N-(2-(苄氧基)-5-(2-溴-1-羟基乙基)苯基)甲酰胺 | (R)-N-(2-(benzyloxy)-5-(2-bromo-1-hydroxyethyl)phenyl)formamide | 201677-59-0 | C16H16BrNO3 | 350.212 |
A broadly based investigation of the effects of a diverse array of substituents on the photochemical rearrangement of p-hydroxyphenacyl esters has demonstrated that common substituents such as F, MeO, CN, CO2R, CONH2, and CH3have little effect on the rate and quantum efficiencies for the photo-Favorskii rearrangement and the release of the acid leaving group or on the lifetimes of the reactive triplet state. A decrease in the quantum yields across all substituents was observed for the release and rearrangement when the photolyses were carried out in buffered aqueous media at pHs that exceeded the ground-state pKaof the chromophore where the conjugate base is the predominant form. Otherwise, substituents have only a very modest effect on the photoreaction of these robust chromophores.