新产品编号:2340287

Chemical Name: L-Phenylalanyl-L-valyl-2'-(2-hydroxyethylsulfanyl)-L-tryptophyl-L-isoleucinamide
项目整合开发状态: Preclinical
项目研究机构: Chugai (Originator)
合成路线:N-Fmoc-L-Isoleucine pentafluorophenyl ester (I) is attached to p-methylbenzhydrylamine resin in the presence of HOBt in DMF to provide the protected isoleucine-bound resin (II).Removal of the N-Fmoc protecting group of (II) is then effected by treatment with piperidine in DMF,to furnish the free amine (III).Subsequent coupling of (III) with N-Fmoc-L-tryptophan pentafluorophenyl ester (IV),followed by deprotection with piperidine/DMF affords the dipeptide resin (V).Further coupling and deprotection cycles with N-Fmoc-L-valine-OPfp (VI) and with N-Fmoc-L-phenylalanine-OPfp (VIII) lead to the peptide resins (VII) and (IX),respectively.Cleavage of resin (IX) to furnish the tetrapeptide amide (X) is accomplished by treatment with trifluoroacetic acid and trimethylsilyl triflate.Then,sulfanylation of the indole ring of (X) with bis-(2-acetoxyethyl) disulfide in the presence of silver triflate produces indolyl sulfide (XI).The acetate ester group of (XI) is finally hydrolyzed under alkaline conditions to furnish the title compound