Method for producing monatin
    5.
    发明授权
    Method for producing monatin 失效
    生产莫纳甜的方法

    公开(公告)号:US07396941B2

    公开(公告)日:2008-07-08

    申请号:US11505997

    申请日:2006-08-18

    IPC分类号: C07D209/18

    CPC分类号: C07D209/20 A23L27/31

    摘要: By simultaneously carrying out an isomerization reaction at position 2 of monatin in different configurations at positions 2 and 4 in the presence of an aldehyde under a condition of pH 4 to 11 in a mixture solvent of water and an organic solvent, and the crystallization of monatin in the same configurations at positions 2 and 4 or a salt thereof, monatin useful as a sweetener, particularly optically active monatin can efficiently be produced.

    摘要翻译: 通过在水和有机溶剂的混合溶剂中,在pH为4〜11的条件下,在醛的存在下,在位置2和4的莫纳甜2位上同时进行异构化反应和莫纳甜结晶 在2和4位的相同构型或其盐中,可以有效地制备用作甜味剂,特别是光学活性莫纳甜的莫纳甜。

    Process for producing cinnamaldehyde derivatives, use thereof and the like
    7.
    发明申请
    Process for producing cinnamaldehyde derivatives, use thereof and the like 有权
    制备肉桂醛衍生物的方法及其用途等

    公开(公告)号:US20050245759A1

    公开(公告)日:2005-11-03

    申请号:US11154658

    申请日:2005-06-17

    摘要: A process for conveniently and efficiently producing a highly pure cinnamaldehyde derivative, for example, (2E)-(3-hydroxy-4-methoxy)cinnamaldehyde, which comprises reacting a benzaldehyde derivative, such as isovanillin and the like, with acetaldehyde in the presence of an alkali, in particular preferably, dropping acetaldehyde little by little thereto in an aqueous solution at a low temperature for the reaction thereof. The cinnamaldehyde derivative thus obtained is selectively reduced to produce 3-(3-hydroxy-4-substituted (with methoxy group or the like)phenyl)propionaldehyde. Further, through a reductive alkylation reaction of the compound thus produced with an aspartame, N-[N-[3-(3-hydroxy-4-substituted (with methoxy group or the like)phenyl)propyl]-L-aspartyl]-L-phenylalanine 1-methyl ester, which is useful as a sweetener having a high sweetening potency, can be industrially and efficiently produced. The processes therefor are also provided.

    摘要翻译: 方便有效地制备高纯度肉桂醛衍生物的方法,例如(2E) - (3-羟基-4-甲氧基)肉桂醛,其包括使苯甲醛衍生物如异喹啉腈等与乙醛在存在下反应 的碱,特别优选在低温下在水溶液中逐滴滴加乙醛进行反应。 由此得到的肉桂醛衍生物被选择性地还原以产生3-(3-羟基-4-取代的(与甲氧基等)苯基)丙醛。 此外,通过如此制备的化合物与天冬甜素的还原烷基化反应,N- [N- [3-(3-羟基-4-取代的(与甲氧基等)苯基)丙基] -L-天冬氨酰基] - 作为具有高甜味效力的甜味剂可用的L-苯丙氨酸1-甲酯可以在工业上有效地生产。 还提供了其工艺。

    Process for purification or recovery of sweetener
    10.
    发明授权
    Process for purification or recovery of sweetener 失效
    净化或回收甜味剂的方法

    公开(公告)号:US06316657B1

    公开(公告)日:2001-11-13

    申请号:US09525319

    申请日:2000-03-13

    申请人: Tadashi Takemoto

    发明人: Tadashi Takemoto

    IPC分类号: C07C22900

    摘要: There is provided a process for purification of N-(3,3-dimethylbutyl)-&agr;-L-aspartyl-L-phenylalanine methyl ester comprising the step of contacting impure N-(3,3-dimethylbutyl)-&agr;-L-aspartyl-L-phenylalanine methyl ester containing at least &agr;-L-aspartyl-L-phenylalanine methyl ester as an impurity, with the mixed solvents having two layers of one layer given from at least one organic solvent which does not mix with water homogeneously and one layer of water to extract N-(3,3-dimethylbutyl)-&agr;-L-aspartyl-L-phenylalanine methyl ester in the organic solvent layer. In the present invention, the desired compound can be purified or recovered efficiently in a high yield without using burdensome steps or operations.

    摘要翻译: 提供了一种纯化N-(3,3-二甲基丁基)-α-L-天冬氨酰基-L-苯丙氨酸甲基酯的方法,该方法包括使不纯的N-(3,3-二甲基丁基)-α-L-天冬氨酰基 至少含有α-L-天冬氨酰基-L-苯丙氨酸甲酯作为杂质的L-苯丙氨酸甲酯,其中混合溶剂具有两层由至少一种不与水均匀混合的有机溶剂提供的一层, 在有机溶剂层中提取N-(3,3-二甲基丁基)-α-L-天冬氨酰基-L-苯丙氨酸甲酯的水。在本发明中,可以高产率有效地纯化或回收所需化合物 没有使用繁重的步骤或操作。