Complexing properties of N-[1,1-bis(hydroxymethyl)ethyl]-and N-[tris(hydroxymethyl)methyl]-β-alanine

Russian Chemical Bulletin - Protolytic and complexing properties of N-[1,1-bis(hydroxymethyl)ethyl]- and N-[tris-(hydroxymethyl)methyl]-β-alanine were estimated using the potentiometry. Values...     

Synthesis of N-[chloro(diorganyl)silyl]anilines

A series of N-[chloro(diorganyl)silyl]anilines RR′Si(NR″Ph)Cl (R, R′ = Me, Ph, CH₂=CH, ClCH₂, Cl(CH₂)₃; R″ = H, Me) was prepared via the reaction of diorganyldichlorosilanes with aniline or N-ethylaniline in the presence of triethylamine.     

N-[ω-（N-三甲基硅甲基苄基）酰胺基]聚乙氧基邻苯二甲酰亚胺的合成

以苄基甘氨酸为原料,经5步反应合成了4个含有酰胺杂键的线型醚链化合物,其结构经1H NMR,MS和元素分析表征.     

双-[N(4-取代苯基)-水杨醛亚胺]合锌(Ⅱ)的晶体结构

为进一步研究过渡金属离子与席夫碱配合和的结构与性能的关系,本文报道双-[N-(4-取代苯基)-水杨醛亚胺]合锌的晶体结构.     

Molecular dynamics simulation of papain-E-64 (N-[N-(L-3-trans-carboxyoxirane-2-carbonyl)-L-leucyl]agmatine) complex

To investigate the possible binding mode of E-64 (N-[N-(L-3-trans-carboxyoxirane-2-carbonyl)-L-leucyl]agmatine), a potent cysteine protease inhibitor, to papain active site, molecular dynamics simulations were applied to two complex forms: R- and S- configurational forms of E-64 C2 atom for the covalent bond formation with the papain Cys-25 SH group. The tertiary structures of the papain-E-64 complexes were built by visual interactive modelling and the energy minimization technique, and were subjected to the dynamics simulations of 10 ps. Although no significant difference was observed between the potential energies of energy-minimized R- and S-complex forms, the molecular dynamics simulations suggested that the hydrogen bonding mode of the former form is more advantageous than that of the latter one. Comparing with the hydrogen bonds observed in the papain-E-64 complex crystal, it could be concluded that the present molecular dynamics simulation reflects well the three-dimensional structure concerning the interaction of E-64 with the papain active site. The conformational characteristics of E-64 and its possible interaction mode with papain were also discussed.     

新树型配体 TBOAA 与钴配合物的研究

研究了新配体N，N’，N”－（三苯甲酰）－三乙氨基胺（TOBAA）与二价钴离子生成配合物的光度特征和电化学特征。在较宽的pH范围内，新试剂和钴离子形成2：1的配合物，并且在一定范围内其吸光度与浓度具有良好的线性关系。     

The synthesis of N-[2-(D-glucos-3-O-yl)propionyl]-l-alanine and N-[(d-glucos-3-O-yl)acetyl]-l-alanine

N-[2-(D-Glucos-3-O-yl)propionyl]-L-alanine ( 7a ) was synthesized, which has a glucose residue instead of N-acetylglucosamine residue in the muramyl peptide. N-[(D-Glucos-3-O-yl)acetyl]-L-alanine ( 7b ) was also synthesized as a glycolyl analog of 7a in order to determine the relationship between the structure of propionyl moiety in the carbohydrate analog ( 7a ) and the adjuvant activity. These simple analogs are compounds prepared for the purpose of introduction into a synthetic polymer with the view of producing polymeric drugs.     

Phenylalanine derivatives containing acyl groups of stereoisomeric N-[tetramethyldiamido(thio)phosphoryl]-and N- [dimorpholido(thio)phosphoryl]-4-aminocyclohexane-carboxylic acids

Conclusions The ethyl esters and Na salts of N-(tetramethyldiamldo(thio)phosphoryl)- and N-(dimorpholido(thio)phosphoryl)-cis- and trans-4-ACHC-DL-phenylalanine have been synthesized.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 2, pp. 386–390, February, 1980.