R-115866

n-[4-[2-乙基-1-(1H-1,2,4-噻唑-1-基)丁基]苯基]-2-苯并噻唑胺Chemical Name: N-(2-Benzothiazolyl)-N-[4-[2-ethyl-1-(1,2,4-triazol-1-yl)butyl]phenyl]amine isomer B
CAS No. 201410-67-5 ((-)-enantiomer), 201410-66-4 ((+)-enantiomer), 201410-53-9 (undefined isomer)
项目整合开发状态: Preclinical
项目研究机构: Janssen (Originator)
合成路线:Addition of Grignard reagent (II) to N-(4-formylphenyl)acetamide (I) produced carbinol (III).After conversion of (III) to mesylate (IV),displacement with 1,2,4-triazole (V) afforded triazolyl derivative (VI).Acid hydrolysis of the acetamido group of (VI) furnished aniline (VII).Treatment of aniline (VII) with carbon disulfide and NaOH,followed by methylation with iodomethane,gave the bis(methylthio)methylene derivative (VIII).Alternatively,aniline (VII) was converted to isothiocyanate (IX) by reaction with thiophosgene.The title benzothiazole was finally obtained by condensation of 2-aminobenzenethiol (X) with either (VIII) or (IX).

合成路线:In a different procedure,N-(4-bromophenyl)-2-benzothiazolamine (XI) was converted into the lithio derivative and subsequently condensed with 2-ethylbutanal (XII) to give carbinol (XIII).Treatment of (XIII) with methanesulfonyl chloride and triethylamine provided mesylate (XIV),which was finally displaced by 1,2,4-triazole (V),yielding the title compound.

合成路线:Friedel-Crafts acylation of acetanilide (I) with 2-chloropropionyl chloride (II) in the presence of AlCl3 provided ketone (III).The chlorine atom of (III) was then displaced with dimethylamine to afford amino ketone (IV),which was reduced to alcohol (V) using NaBH4 in MeOH.Treatment of alcohol (V) with carbonyl diimidazole furnished the imidazolyl derivative (VI).The acetamido group of (VI) was then hydrolyzed with 3N HCl to give aniline (VII).This compound was converted to isothiocyanate (VIII) by treatment with thiophosgene and NaOH.Alternatively,aniline (VII) was treated with carbon disulfide and NaOH and then with iodomethane to give the bis(methylthio)methyleneamino derivative (IX).The condensation of either (VIII) or (IX) with 2-aminothiophenol (X) produced the target benzothiazole (XI) as a mixture of isomers.Then,separation of the diastereoisomers by column chromatography,followed by resolution by chiral HPLC,furnished the title (S,S)-isomer.