PURPOSE:To obtain a 2-methylaziridine-3-carboxylic ester useful as an intermediate for an essential amino acid, threonine, and a pesticide, by reacting an alpha,beta-dihalogeno-butyric ester with NH3 in a solvent. CONSTITUTION:One mole of an alpha,beta-dihalogeno butyric ester or alpha-...
Models for boronic acid receptors II: a computational structural, bonding, and thermochemical investigation of the RB(OH)2∙H2O∙NH3 and RB(−OCH2CH2O−)∙NH3∙H2O potential energy surfaces (R = H, methyl, phenyl, and ortho-methyl-phenyl) ...
The reaction of an ester with N,O-dimethylhydroxylamine and a suitable organomagnesium reagent or lithium amide base provides a general method for the prep... J.Michael Williams and Ronald B. Jobson and Nobuyoshi Yasuda and George Marchesini and Ulf-H. Dolling and Edward J.J. Grabowski - 《...
Synthesis mono polyethylene glycol maleate withmaleic acidand polyethylene glycol analysis the influencing factors of the reaction,through test,it was found:under condition of existence of self-made catalyst,Fix mol ratio of polyethylene to glycolmaleic acidat 2. ...
reaction. Thereby, the α-hydroxy acid is introduced into the polypeptide with the translational reaction in the ribosome at non-sense codon specifically. However, in this method, once a tRNA bound with the α-hydroxy acid is used in the reaction, the tRNA itself needs not to be reused. ...
In this work, 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD)-catalyzed aminolysis reaction of methyl acetate with methylamine has been investigated at the B3LYP... Lu Jin a b,Yong Wu c,Chan-kyung Kim c,... - 《Journal of Molecular Structure Theochem》 被引量: 19发表: 2010年 Synthesis ...
point of the solvent to give a 2-methyl-aziridine-3-carboxylic ester of the formula (R is ester residue). The cis-form substance which is an intermediate for the biologically effective threo-form threonine can be obtained by making proper selection of the type of the solvent and reaction ...
by diazotization and olefination, in one step, by the reaction of a secondary or a tertiary alkyl or a crcloalkyl ester with NH3 in the presence of an aprotic polar organic solvent.AKITANI TADATOSHIKOMEYOSHI YUKIONAGASE TSUNEYUKI
by diazotization and olefination, in one step, by the reaction of a secondary or a tertiary alkyl or a crcloalkyl ester with NH3 in the presence of an aprotic polar organic solvent.AKITANI TADATOSHIKOMEYOSHI YUKIONAGASE TSUNEYUKI
The complexes cis-[(NH3)4Ru(NH2CH2COOR)2]- (PF6)2 (R=CH3, CH2C6H5) and cis-[(NH3)4Ru- (NH2CH2COOC2H5)2](CF3SO3)2 have been prepared. Fast oxidation of the ruthenium ion to Ru(III) was followed by a first order pH dependent reaction that produced [(NH3)4RuNH2CH2COO]2+...