新产品编号:1979591
Chemical Name: 3-[1-[4-[2-[2(R)-Hydroxy-2-(3-pyridyl)ethylamino]ethyl]phenylamino]-2(Z)-nitroethenylamino]benzamide
项目整合开发状态: Biological Testing
项目研究机构: Merck & Co. (Originator)
合成路线:Alternatively,reaction of 6-chloronicotinic acid (XIII) with methyllithium-lithium bromide complex gave methyl ketone (XIV).This was brominated by means of dibromobarbituric acid (XV) to produce bromoketone (XVI).Asymmetric reduction of (XVI) with (-)-B-chlorodiisopinocampheylborane provided the (R)-bromohydrin (XVII),which was converted to epoxide (XVIII) with NaOH in aqueous THF.Epoxide (XVIII) opening with 4-nitrophenethylamine (XIX) produced amino alcohol (XX),which by further protection with Boc2O gave carbamate (XXI).Concomitant dechlorination and nitro group reduction in (XXI) by hydrogenation using Raney Nickel as catalyst provided amine (XI).This was finally converted to the target compound by means of sulfonylation and deprotection as above.
合成路线:Reaction of 6-chloronicotinic acid (I) with methyllithium lithium bromide complex gives methyl ketone (II),which is treated with dibromobarbituric acid (III) in refluxing THF to afford bromoketone (IV).Asymmetric reduction of (IV) with (-)-DIP-chloride [(-)-B-chlorodiisopinocampheylborane] provides bromohydrin (V),which is converted into epoxide (VI) by treatment with NaOH in THF/H2O.Opening of the epoxide moiety of (VI) with p-nitrophenethylamine hydrochloride (VII) in MeOH in the presence of Et3N followed by N-protection with Boc2O in THF yields ethanolamine (VIII),which is then hydrogenated over Ni-Raney in EtOH/NaOH to furnish dechlorinated aniline (IX).Condensation of (IX) with 1,1-bis(methylsulfanyl)-2-nitroethylene (X) in isopropanol gives compound (XI),which is then subjected to reaction with aniline (XII) in isopropanol to afford nitroethylenediamine (XIII).Finally,the desired product is obtained by Boc removal of (XIII) by treatment with TFA in CH2Cl2.
📌 参考资料/链接：
参考文献标题:3-Pyridylethanolamines: Potent and selective human beta3 adrenergic receptor agonists
文献作者:Naylor,E.M.; Colandrea,V.J.; Candelore,M.R.; Cascieri,M.A.; Colwell,L.F.Jr.; Deng,L.; Feeney,W.P.; Forrest,M.J.; Hom,G.J.; MacIntyre,D.E.; Strader,C.D.; Tota,L.; Wang,P.R.; Wyvratt,M.J.; Fisher,M.H.; Weber,A.E.
参考来源:Bioorg Med Chem Lett 1998,8(21),3087
📄 详细内容
合成路线:Reaction of 6-chloronicotinic acid (I) with methyllithium lithium bromide complex gives methyl ketone (II),which is treated with dibromobarbituric acid (III) in refluxing THF to afford bromoketone (IV).Asymmetric reduction of (IV) with (-)-DIP-chloride [(-)-B-chlorodiisopinocampheylborane] provides bromohydrin (V),which is converted into epoxide (VI) by treatment with NaOH in THF/H2O.Opening of the epoxide moiety of (VI) with p-nitrophenethylamine hydrochloride (VII) in MeOH in the presence of Et3N followed by N-protection with Boc2O in THF yields ethanolamine (VIII),which is then hydrogenated over Ni-Raney in EtOH/NaOH to furnish dechlorinated aniline (IX).Condensation of (IX) with 1,1-bis(methylsulfanyl)-2-nitroethylene (X) in isopropanol gives compound (XI),which is then subjected to reaction with aniline (XII) in isopropanol to afford nitroethylenediamine (XIII).Finally,the desired product is obtained by Boc removal of (XIII) by treatment with TFA in CH2Cl2.
参考文献标题:Human beta3 adrenergic receptor agonists containing cyanoguanidine and nitroethylenediamide moieties
文献作者:Brockunier,L.L.; Candelore,M.R.; Cascieri,M.A.; Liu,Y.; Tota,L.; Wyvratt,M.J.; Fisher,M.H.; Weber,A.E.; Parmee,E.R.
参考来源:Bioorg Med Chem Lett 2001,11(3),379