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公开(公告)号:US4230869A
公开(公告)日:1980-10-28
申请号:US887132
申请日:1978-03-16
IPC分类号: C07D233/78
CPC分类号: C07D233/78
摘要: A process for preparing 5-(4-hydroxyphenyl)hydantoin by reacting glyoxylic acid, urea and phenol in an aqueous medium in the presence of an acid at an elevated temperature. The hydantoin of high purity can be readily prepared in good yields.
摘要翻译: 在酸性存在下,在高温下,使乙醛酸,脲和苯酚在水性介质中反应制备5-(4-羟基苯基)乙内酰脲的方法。 高纯度的乙内酰脲可以容易地以良好的产率制备。
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公开(公告)号:US4148688A
公开(公告)日:1979-04-10
申请号:US763710
申请日:1977-01-28
IPC分类号: C12P13/12 , C12P41/00 , C12R1/04 , C12R1/07 , C12R1/13 , C12R1/15 , C12R1/18 , C12R1/265 , C12R1/32 , C12R1/38 , C12R1/465 , C12R1/64 , C12D13/06
CPC分类号: C12P13/12 , Y10S435/822 , Y10S435/824 , Y10S435/828 , Y10S435/829 , Y10S435/83 , Y10S435/832 , Y10S435/836 , Y10S435/84 , Y10S435/843 , Y10S435/847 , Y10S435/849 , Y10S435/852 , Y10S435/859 , Y10S435/869 , Y10S435/872 , Y10S435/873 , Y10S435/874 , Y10S435/875 , Y10S435/883 , Y10S435/886 , Y10S435/89 , Y10S435/91 , Y10S435/921 , Y10S435/942 , Y10S435/944
摘要: A process for preparing L-methionine by subjecting DL- or L-N-carbamoylmethionine to the action of a cultured broth, cells or treated cells of microorganisms having a capability in asymmetrically hydrolyzing the carbamoyl group of N-carbamoylmethionine. The process is suited for large-scale economical manufacturing of L-methionine.
摘要翻译: 通过使DL-或L-N-氨基甲酰基甲硫氨酸经受培养的肉汤,细胞或处理的具有不对称水解N-氨基甲酰基甲硫氨酸氨基甲酰基的能力的微生物的细胞的作用来制备L-甲硫氨酸的方法。 该方法适用于L-甲硫氨酸的大规模经济生产。
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公开(公告)号:US4272517A
公开(公告)日:1981-06-09
申请号:US40969
申请日:1979-05-21
摘要: A permanent waving composition which comprises N-carbamoylcysteine and which acts mildly on the human hair and skin and has outstanding stability during application and storage. When further incorporating cysteine, the composition posseses the advantages afforded by cysteine without involving the drawbacks attendant on the use of cysteine.
摘要翻译: 一种永久挥发性组合物,其包含N-氨基甲酰基半胱氨酸,并且其在人的头发和皮肤上轻微作用,并且在施用和储存期间具有优异的稳定性。 当进一步掺入半胱氨酸时,该组合物具有由半胱氨酸提供的优点,而不涉及半胱氨酸的使用所引起的缺点。
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