Process for the production of aqueous solutions of sodium salts of .alpha.-
a
    1.
    发明授权
    Process for the production of aqueous solutions of sodium salts of .alpha.- a 失效
    制备α-氨基羧酸钠盐水溶液的方法

    公开(公告)号:US4436910A

    公开(公告)日:1984-03-13

    申请号:US347477

    申请日:1982-02-10

    CPC分类号: C07D211/60

    摘要: Aqueous solutions of sodium salts of .alpha.-aminocarboxylic acids practically free of foreign salts are produced by saponifying the corresponding hydantoin at a temperature between 110.degree. C. and 180.degree. C. with a mixture, in each case based on the hydantoin, of 1 equivalent of sodium hydroxide and 2 equivalents of calcium oxide or hydroxide, separating off the precipitated calcium carbonate after the end of the saponification and concentrating the aqueous sodium salt solution remaining to drive off the ammonia contained therein.

    摘要翻译: 通过在110℃和180℃之间的温度下将相应的乙内酰脲在一种混合物中(基于乙内酰脲)相当于1当量的水溶液皂化相应的乙内酰脲来生产实际上不含外来盐的α-氨基羧酸的钠盐水溶液 的氢氧化钠和2当量的氧化钙或氢氧化物,在皂化结束后分离析出的碳酸钙,并浓缩剩余的钠盐水溶液以驱除其中所含的氨。

    Process for the production of L-proline
    2.
    发明授权
    Process for the production of L-proline 失效
    生产L-脯氨酸的方法

    公开(公告)号:US4469876A

    公开(公告)日:1984-09-04

    申请号:US418841

    申请日:1982-09-16

    CPC分类号: C07D207/16 C07D207/22

    摘要: L-proline is produced from the methyl or ethyl ester of L-pyroglutamic acid by reacting this with at least twice the molar amount of phosgene to form the corresponding 1-chlorocarbonyl-5,5-dichloroproline ester, producing the corresponding 2-chloro-1-chlorocarbonyl-pyrrolin-(2)-carboxylic acid ester-(5) therefrom by splitting off hydrogen chloride, catalytically hydrogenating the pyrrolin-(2) compound to the corresponding N-chlorocarbonyl-proline ester and hydrolyzing the latter with acid to form L-proline.

    摘要翻译: 通过将其与至少两倍摩尔量的光气反应形成相应的1-氯羰基-5,5-二氯脯氨酸酯,由L-焦谷氨酸的甲酯或乙酯制备L-脯氨酸,产生相应的2-氯 - 通过分离氯化氢,将吡咯啉 - (2)化合物催化氢化成相应的N-氯羰基 - 脯氨酸酯并用酸水解后者形成1-氯羰基 - 吡咯啉 - (2) - 羧酸酯 - (5) L-脯氨酸。

    Process for the production thiazolines-(3)
    5.
    发明授权
    Process for the production thiazolines-(3) 失效
    生产噻唑啉的方法 - (3)

    公开(公告)号:US4415738A

    公开(公告)日:1983-11-15

    申请号:US281858

    申请日:1981-07-09

    CPC分类号: C07D277/60 C07D277/10

    摘要: There are produced thiazoline-(3) compounds which optionally are substituted or unsubstituted in the 2 and/or 5 positions by reaction of oxo compounds with a metal sulfides, ammonia and oxo compounds which are substituted by halogen in the position adjacent to the oxo group. In this process a mixture of oxo compounds, metal sulfides and ammonia is present and the halogen substituted oxo compound is introduced into the mixture. By using in this manner of mixing, high yields are obtained in a relatively short period of time.

    摘要翻译: 产生噻唑啉 - (3)化合物,其任选在2和/或5位上被取代或未取代,其中氧代化合物与金属硫化物,氨和氧代化合物的反应,所述卤代化合物在与氧代基相邻的位置被卤素取代 。 在该方法中,存在氧化合物,金属硫化物和氨的混合物,并将卤素取代的氧代化合物引入混合物中。 通过以这种混合方式使用,在相对短的时间内获得高产率。

    Process for the production of peptides
    6.
    发明授权
    Process for the production of peptides 失效
    生产肽的方法

    公开(公告)号:US4374062A

    公开(公告)日:1983-02-15

    申请号:US311454

    申请日:1981-10-14

    CPC分类号: C07K1/023

    摘要: There are produced peptides by asymmetrical hydrogenation of dehydropeptides of the general formula ##STR1## in which n is a whole number from 1 to 4, R.sub.1 and R.sub.2 are the same or different, and are hydrogen, a straight or branched chain alkyl group with 1 to 10 carbon atoms, or such a group substituted with a carboxyl group, a phenyl group which is unsubstituted or substituted in the 3 or 4 position or in both the 3 and 4 positions by a hydroxyl, alkoxy, or acyloxy group or an indolyl group which is unsubstituted or substituted in the 6 position by fluorine or chlorine or an indolyl group substituted by a methyl group. R.sub.3 is hydrogen, an alkali metal, or a lower alkyl group with 1 to 4 carbon atoms, R.sub.4 is hydrogen, an acetyl group or a chloroacetyl group and R.sub.5 is hydrogen or a straight or branched chain alkyl group having 1 to 4 carbon atoms with the proviso that when n is 2, 3, or 4, the individual groups R.sub.5 are the same or different, in the presence of chiral rhodium-complexes.

    摘要翻译: 通过非对称氢化产生通式为“IMAGE”的脱氢肽的肽,其中n为1至4的整数,R 1和R 2相同或不同,为氢,具有1个直链或支链烷基的直链或支链烷基 或被羧基取代的基团,未被取代或在3或4位或3或4位被羟基,烷氧基或酰氧基或吲哚基取代的苯基 其未被取代或在6位被氟或氯取代或被甲基取代的吲哚基。 R3是氢,碱金属或具有1至4个碳原子的低级烷基,R4是氢,乙酰基或氯乙酰基,R5是氢或具有1-4个碳原子的直链或支链烷基, 条件是当n为2,3或4时,在手性铑配合物的存在下,各基团R 5相同或不同。

    Process for the separation of L-leucine and L-isoleucine
    7.
    发明授权
    Process for the separation of L-leucine and L-isoleucine 失效
    分离L-亮氨酸和L-异亮氨酸的方法

    公开(公告)号:US4562153A

    公开(公告)日:1985-12-31

    申请号:US612803

    申请日:1984-05-22

    摘要: The separation of L-leucine and L-isoleucine in aminoacid mixtures containing at least 30 weight percent L-leucine, at most 70 weight percent L-isoleucine and at most 40 weight percent of other aminoacids is accomplished by acetylating the mixture, precipitating the acetylation product by acidification, subjecting the aqueous solution to a saponification by an L-aminoacid acylase until 25 to 95% of the N-acetyl-L-leucine is saponified, crystallizing pure L-leucine from the saponification mixture and separating it off, isolating N-acetyl-L-isoleucine from the mother liquor and saponifying it in known manner to the free aminoacid and isolating the free aminoacid.

    摘要翻译: L-亮氨酸和L-异亮氨酸在含有至少30重量%L-亮氨酸,至多70重量%L-异亮氨酸和至多40重量%其它氨基酸的氨基酸混合物中的分离通过乙酰化该混合物来实现,使乙酰化 通过酸化将水溶液进行L-氨基酸酰基转移酶皂化,直到25-95%的N-乙酰基-L-亮氨酸被皂化,从皂化混合物中结晶出纯的L-亮氨酸并将其分离出来,分离N 乙酰基-L-异亮氨酸,并以已知方式将其皂化成游离氨基酸并分离游离氨基酸。