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    • 86. 发明申请
    • Process for producing polypeptide mixtures using hydrogenolysis
    • 使用氢解制备多肽混合物的方法
    • US20060172942A1
    • 2006-08-03
    • US11336251
    • 2006-01-20
    • Ben-Zion Dolitzky
    • Ben-Zion Dolitzky
    • A61K38/17C07K1/02C07K14/00
    • C07K14/001A61K38/00C07K1/061C07K1/12Y02P20/55
    • The subject invention provides for a process for making a mixture of acetate salts of polypeptides, each of which consisting of glutamic acid, alanine, tyrosine and lysine, wherein the mixture has a desired peak molecular weight, comprising: a) polymerizing N-carboxyanhydrides of tyrosine, alanine, γ-benzyl glutamate and trifluoroacetyllysine with an initiator in an amount of 0.01% to 20% by weight for a suitable period of time and at a suitable temperature to form a mixture of protected polypeptides, which mixture of polypeptides in unprotected form having a first peak molecular weight; b) removing the benzyl protecting group from the mixture of protected polypeptides by contacting the polypeptides with a hydrogenolysis catalyst and hydrogen to produce a mixture of trifluoroacetyl protected polypeptides, which mixture of polypeptides in unprotected form having the first peak molecular weight; c) removing the trifluoroacetyl protecting group from the trifluoroacetyl protected polypeptides by contacting the polypeptides with an organic base solution to form a mixture of polypeptides, which mixtures of polypeptides in unprotected form having the first peak molecular weight; d) removing the free trifluoroacetyl groups and low molecular weight impurities by ultrafiltration to obtain the mixture of polypeptides each of which consisting of glutamic acid, alanine, tyrosine and lysine; and e) contacting the mixture of polypeptides each of which consisting of glutamic acid, alanine, tyrosine and lysine with an aqueous solution of acetic acid to form the mixture of acetate salts of polypeptides each of which consisting of glutamic acid, alanine, tyrosine and lysine and having the desired peak molecular weight.
    • 本发明提供了制备多肽的乙酸盐的混合物的方法,其中每一种由谷氨酸,丙氨酸,酪氨酸和赖氨酸组成,其中所述混合物具有所需的峰分子量,其包括:a)使N-羧酸酐 酪氨酸,丙氨酸,γ-苄基谷氨酸和三氟乙酰赖氨酸,其引发剂的量为0.01重量%至20重量%,持续适宜的时间和温度,以形成受保护的多肽的混合物,多肽的未受保护的形式 具有第一峰分子量; b)通过使多肽与氢解催化剂和氢气接触来除去保护的多肽的混合物中的苄基保护基团,以产生三氟乙酰基保护的多肽的混合物,该多肽的未保护形式的混合物具有第一峰分子量; c)通过使多肽与有机碱溶液接触以形成多肽的混合物,从三氟乙酰保护的多肽中除去三氟乙酰基保护基,多肽的混合物以未保护形式具有第一峰分子量; d)通过超滤除去游离的三氟乙酰基和低分子量杂质,得到各自由谷氨酸,丙氨酸,酪氨酸和赖氨酸组成的多肽的混合物; 和e)将由谷氨酸,丙氨酸,酪氨酸和赖氨酸组成的各自的多肽混合物与乙酸的水溶液接触,形成各自由谷氨酸,丙氨酸,酪氨酸和赖氨酸组成的多肽的乙酸盐的混合物 并具有所需的峰分子量。