顺式或反式环辛烯β氨基酸(cyclooctene beta-amino acids) 结构特点: 顺式或反式环辛烯β氨基酸是指环辛烯结构上连接了β氨基酸的化合物。β氨基酸是一类非天然氨基酸,其氨基位于碳链的β位(即第二个碳原子上),与常见的α氨基酸不同。 环辛烯的顺反异构体(cis-cyclooctene和trans-cyclooctene)具有不同的空间构型,...
Heterocyclic compound of Formula 1, R1 for a, AR or het, R2, R2 ',R2: each is independent,denote H, A, OA or Hal, R3 denotes Het; R4, R5 denote H, R6 denotes H, A, Ar or Het; R7, R8 denote H or R7 and R8 together denote = O, R9, R10, R11 each, independently of ...
Testing of 300 alpha- and beta-amino acids led to the discovery of two novel neuraminidase inhibitors, a phenylglycine and a pyrrolidine, which exhibited K(i) values in the 50 microM range versus influenza virus A/N2/Tokyo/3/67 neuraminidase but which exhibited weaker activity against influenza...
Feeding of amino acids to hairy roots of the yellow beet (Beta vulgaris var. lutea) usually results in the formation of the respective betaxanthins. One exception is (S)-glutamate whose feeding leads to an increase in the betaxanthin vulgaxanthin I (glutamine as amino-acid moiety) instead ...
A general simple procedure having the potential for large scale preparations of racemic β3- amino acids has been developed. The procedure involves base-catalyzed Michael-type addition of sodium diethyl malonate to N-Boc-α-amidoalkyl-p-tolyl su
生化机理 DL-Cystine is a racemic mixture of the proteinogenic amino acids L-cystine and the non-proteinogenic D-cystine. DL-cystine is used in the preparation of sulfur-containing dimeric and monomeric surfactants. 运输条件 常规运输 产品介绍 DL-cystine is used in the preparation of sulfur-...
SUMMARY OF THE INVENTION The present invention relates to a process for the preparation of chiral beta-amino acids of the formula wherein R is selected from the group consisting of alkenyl, alkynyl, aryl, lower alkyl, substituted aryl, pyridyl and furanyl and R1is lower alkyl; which process ...
Geoffrey W CoatesAngewandte ChemieByrne, C. M. et al., Catalytic Synthesis of Beta3-Amino Acid Derivatives from Alpha-Amino Acids, Ange. Chemie. Int. Ed., 47(21), 3979-3983 (2008).Catalytic synthesis of β3-amino acid derivatives from α-amino acids. Byrne, Christopher M.,Church, ...
A detailed study of the addition of the dianions of carboxylic acids to isocyanates is presented. The use of sub-stoichiometric amounts of the amine in the generation of the dianion leads to an optimized process, which prevents the formation of urea derivatives due to the secondary reaction of...
Fustero S,Pina B,Salavert E,et al.New Strategy for the Stereoselective Synthesis of Fluorinated β-Amino Acids.Journal of Organic Chemistry. 2002Fustero,S,Pina, B,Salavert, E,Navarro, A,Arellano, C.R,Fuentes, A. S. New strategy for the stereoselective synthesis of fluorinated beta-amino ...