Aldose epimerization by Ni(II): effect of ether-containing alkylenediamine ligands
摘要:
Several N-substituted ethylenediamine (en) Ni(II) derivatives containing ether linkages were prepared in order to study the effect of ligand structure on C-2 epimerization of aldohexoses. The reagent consisted of a Ni(II)-alkylenediamine derivative in methanol. The presence of ether linkages in the ligand increased the solubility of the complexes, and resulted in an increase in the rate of epimerization. Epimerization occured rapidly under mild conditions, and the same equilibrium point was reached regardless of whether the reaction was started from glucose or mannose. Among the ligands studied, N,N'-dialkylethyl-enediamine was the most active in C-2 epimerization.
Aldose epimerization by Ni(II): effect of ether-containing alkylenediamine ligands
摘要:
Several N-substituted ethylenediamine (en) Ni(II) derivatives containing ether linkages were prepared in order to study the effect of ligand structure on C-2 epimerization of aldohexoses. The reagent consisted of a Ni(II)-alkylenediamine derivative in methanol. The presence of ether linkages in the ligand increased the solubility of the complexes, and resulted in an increase in the rate of epimerization. Epimerization occured rapidly under mild conditions, and the same equilibrium point was reached regardless of whether the reaction was started from glucose or mannose. Among the ligands studied, N,N'-dialkylethyl-enediamine was the most active in C-2 epimerization.
申请人:The United States of America as represented by the Department of Health,
公开号:US04077957A1
公开(公告)日:1978-03-07
A pteridine compound having the formula of 6-(bromomethyl)-2,4-diaminopteridine hydrobromide. 2,4-diamino-6-pteridine-methanol.HBr is reacted with triphenylphosphine dibromide or phosphorus tribromide to form 6-(bromomethyl)-2,4-diaminopteridine hydrobromide. The bromine atom in the molecule can then be replaced with the functional group, N-[4-(methylamino)-benzoyl]-L-glutamic acid in the case of methotrexate and N-(4-aminobenzoyl)-L-glutamic acid in the case of aminopterin.
Derivatives of 2-amino-1-phenylethanol having antiulcer activity
申请人:A. H. Robins Company, Incorporated
公开号:US05171753A1
公开(公告)日:1992-12-15
Derivatives of 2-amino-1-phenylethanol were prepared from substituted amines and benzoin, stilbene oxide or styrene oxide to give compounds of Formula: ##STR1## where R is H or (un)substituted phenyl and C is a linking group or terminal group. The compounds of this invention can inhibit ulceration in in-vivo studies in rats.
The invention relates to growth hormone compounds with a protracted profile. The effect is obtained by linking an albumin binding residue via a hydrophilic spacer to growth hormone variants. Further described are methods of preparing and using such compounds. These growth hormone compounds are based on there althered profile considered particular useful in therapy.
Aminothiazole der Formel
oder deren Tautomere, worin
R¹ und R² jeweils Wasserstoff oder zusammen einen Rest der Formel
in der T¹ für Wasserstoff, Alkyl oder Phenyl, T² und T³ unabhängig voneinander für Alkyl oder Phenyl, oder T² und T³ zusammen mit dem sie verbindenden Stickstoffatom für einen heterocyclischen Rest stehen,
R³ substituiertes Mercapto oder substituiertes Amino und
R⁴ Alkanoyl, Benzoyl, Cyano oder einen Rest der Formel
bedeuten, worin T⁴ für Hydroxy, C₁-C₆-Alkoxy, Amino oder den Rest R³, T⁵ für Wasserstoff, Alkyl oder Phenyl und T⁶ für den Rest eines primären Amins oder einer methylenaktiven Verbindung stehen, sowie ein Verfahren zu ihrer Herstellung.
[EN] PROCESS FOR COATING ELECTRICALLY CONDUCTIVE SUBSTRATES, AQUEOUS ENAMEL, PROCESS FOR PRODUCING AN ADDUCT CONTAINING URETHANE GROUPS AND ADDUCT CONTAINING URETHANE GROUPS
申请人:BASF LACKE + FARBEN AKTIENGESELLSCHAFT
公开号:WO1991002035A1
公开(公告)日:1991-02-21
(DE) Die Erfindung betrifft ein kathodisches Elektrotauchlackierverfaheren, das dadurch gekennzeichnet ist, daß der verwendete Elektrotauchlack ein urethangruppenhaltiges Addukt enthält, das erhältlich ist, indem ein Polyester- oder Polyetherpolyol, ein Polyisocyanat und eine Verbindung, die eine Hydroxylgruppe und mindestens eine Ketimingruppe im Molekül enthält, miteinander umgesetzt werden.(EN) The invention relates to a cathodic electrophoretic enamelling process characterized in that the electrophoretic enamel contains an adduct containing urethane groups. The adduct is obtained by reacting a polyester or polyether polyol, a polyisocyanate and a compound containing a hydroxyl group and at least one ketimine group in the molecule.(FR) L'invention concerne un procédé de trempage électrophorétique cathodique caractérisé en ce que la laque électrophorétique utilisée renferme un additif contenant des groupes uréthanes. Cet additif s'obtient par réaction d'un polyol de polyester ou de polyéther d'un polyisocyanate et d'un composé contenant un groupe hydroxyl et au moins un groupe cétimine dans la molécule.