合成路线:The Grignard condensation of 2,3-dichloroiodobenzene (I) with CO2 by means of Mg / ether gives 2,3-dichlorobenzoic acid (II),which is converted to the corresponding acyl chloride (III) by refluxing with SOCl2.The reaction of (III) with cuprous cyanide and KI in refluxing xylene yields 2,3-dichlorobenzoyl cyanide (IV).Finally,this compound is cyclized with aminoguanidine (V) in DMSO.
参考文献标题:Lamotrigine
文献作者:Castar,J.; Prous,J.
参考来源:Drugs Fut 1986,11(6),456
合成路线:Condensation of 2,3-dichlorobenzoyl cyanide (I) with aminoguanidine (II) by means of PPA in hot acetonitrile yields 2,3-dichlorobenzoyl cyanide amidinohydrazone (III),which is cyclized to the target 1,2,4-triazine by heating in refluxing propanol with or without DMSO.
参考文献标题:Process for preparing substd.benzoyl cyanide amidinohydrazones
文献作者:Nadaka,V.; Lexner,J.; Kaspi,J.(Chemagis Ltd.)
参考来源:EP 1127873
合成路线:Hydrogenation of 2,3-dichloronitrobenzene (I) with H2 over Ra-Ni in methanol gives 2,3-dichloroaniline (II),which is diazotized with NaNO2 and HCl and treated with CuCN to yield 2,3-dichlorobenzonitrile (III).Hydrolysis of the nitrile (III) with NaOH in refluxing methanol/water affords 2,3-dichlorobenzoic acid (IV),which is treated with hot SOCl2 to provide the corresponding acyl chloride (V).Reaction of (V) with CuCN and KI in refluxing chlorobenzene gives 2,3-dichlorobenzoyl cyanide (VI),which is condensed with aminoguanidine (VII) by means of H2SO4/TsOH in hot toluene to yield 2,3-dichlorobenzoyl cyanide amidinohydrazone (VIII).Finally,this compound is cyclized by treatment with NaOMe in refluxing methanol.
参考文献标题:A process for the preparation of 6-(2,3-dichlorophenyl)-1,2,4-triazine-3,5-diamine,commonly known as lamotrigine
文献作者:Srivastava,A.R.; Sasikumar,T.M.; Radhakrishnan,T.V.(RPG Life Sciences Ltd)
参考来源:WO 0149669
合成路线:The reaction of 2,3-dichlorobenzoic acid (I) with oxalyl chloride in dichloromethane gives the acyl chloride (II),which is condensed with labeled copper cyanide (III) by means of KI in refluxing xylene to yield the 2,3-dichlorobenzoyl cyanide (IV).The condensation of (IV) with labeled aminoguanidine (V) by means of sulfuric acid in acetonitrile/water affords adduct (VI),which is finally cyclized by refluxing under the conditions of the preceding reaction to provide the target labeled diaminotriazine.The intermediate labeled copper cyanide (III) has been obtained by reaction of CuSO4 with labeled potassium cyanide (VII) and Na2S2O5 in hot water.The intermediate labeled aminoguanidine (V) has been obtained by methylation of thiourea (VIII) with dimethyl sulfate in boiling water to give S-methylisothiourea (IX),which is finally treated with hydrazine (X) and NaOH in water.
参考文献标题:Synthesis of stable isotopically labelled versions of lamotrigine and its methylated metabolite
文献作者:Manning,C.O.; et al.
参考来源:J Label Compd Radiopharm 2002,45(7),611
产品链接: CAS No. 84057-84-1››