Showing papers on "Oxazolidine published in 1984"
32 citations
TL;DR: L'anoleine reagit avec the piperidine(hydroxymethyl-«2») pour produire une oxazolidine bicyclique en phase gazeuse avec un detecteur specifique pour l'azote.
Abstract: L'anoleine reagit avec la piperidine(hydroxymethyl-«2») pour produire une oxazolidine bicyclique. Ce compose est ensuite dose par chromatographie en phase gazeuse avec un detecteur specifique pour l'azote. La deviation relative standard est de l'ordre de 11,1%
23 citations
TL;DR: In this article, LiD-dimethylcuprate was added to the chiral oxazolidine in ether or in hexane to obtain 3-phenylbutanals having the S or R configuration, respectively, with high optical yield in the latter case.
18 citations
TL;DR: In this paper, the reaction rates at these pH values were shown to decrease with increasing steric effects within the β-amino alcohol moiety, in particular at the α-position to the nitrogen atom, and to increase with increasing electronegativity of the substituents at the β position to nitrogen atom.
10 citations
TL;DR: Preparative-scale high pressure liquid chromatography on 3-acetyl-2-(2-6′-dimethyl-5′-heptenyl)oxazolidine (1), a complex acetamide derivative of citronellal, resulted in isolation of the diastere as mentioned in this paper.
Abstract: Preparative-scale high pressure liquid chromatography on 3-acetyl-2-(2′,6′-dimethyl-5′-heptenyl)oxazolidine (1), a complex acetamide derivative of citronellal, resulted in isolation of the diastere...
10 citations
TL;DR: In this paper, the base-catalyzed reaction of bis(L-serinato)copper(II) with excess formaldehyde proceeds via the initial dissociation of the proton on the nitrogen atom of the amino acid chelate.
6 citations
Patent•
19 Dec 1984
TL;DR: In this paper, a process for producing cationic epoxy resins carrying oxazolidine groups suitable as paint binders was described, where the epoxy resin is reacted with a hydroxy functional oxazlinine compound or with an oxazolisine compound carrying in the ring the structure of a monocarboxy compound.
Abstract: Process for producing cationic epoxy resins carrying oxazolidine groups suitable as paint binders, and particularly paint binders for the formulation of cathodically depositable paints, wherein the epoxy resin is reacted with a hydroxy functional oxazolidine compound or with an oxazolidine compound carrying in the ring the structure ##STR1## in the presence of a monocarboxy compound. The presence of the monocarboxy compound permits the direct reaction or linkage of the epoxy resin with the oxazolidine compound without gelation; and, additionally, the monocarboxy compound favorably influences the film-forming characteristics of the binders.
4 citations
Patent•
18 Jun 1984
TL;DR: Hardener components which crosslink through transesterification comprising a KNOEVENAGEL reaction product of a carbonyl compound and a compound such as the diester of malonic acid reacted in a MICHAEL-addition reaction with (B) a substituted oxazolidine carrying a secondary amino group are described in this article.
Abstract: Hardener components which crosslink through transesterification comprising (A) a KNOEVENAGEL reaction product of a carbonyl compound and a compound such as the diester of malonic acid reacted in a MICHAEL-addition reaction with (B) a substituted oxazolidine carrying a secondary amino group, and where the reaction product of (A) and (B) is thereafter reacted through the methylene groups with (C) a polyisocyanate is described. The hardener components are particularly suitable for use in water-dilutable cationic paint binders.
3 citations
Patent•
26 Jan 1984TL;DR: Hypoglycemic 5-chromanyl, 2,3-dihydro-5-benzo[b]-furanyl, 5-pyridyl, 3-acylated derivatives thereof; a method of treating hyperglycemic animals therewith; and intermediates useful in the preparation of said compounds as discussed by the authors.
Abstract: Hypoglycemic 5-chromanyl, 2,3-dihydro-5-benzo[b]-furanyl, 5-pyridyl, 5-quinolyl, 5-pyrrolyl, 5-indolyl, 5-thiazolyl, 5-oxazolyl, 5-isothiazolyl and 5-isoxazolyl oxazolidine-2,4-diones and the pharmaceutically-acceptable salts thereof; certain 3-acylated derivatives thereof; a method of treating hyperglycemic animals therewith; and intermediates useful in the preparation of said compounds.
3 citations
2 citations
TL;DR: In this paper, the reaction of tert-butylamine, isoxazolidine and hydrazine with N-[3-chloropropyl)oxy]phthalimide is investigated.
Patent•
15 Nov 1984
Patent•
11 Jan 1984
TL;DR: In this paper, the α-d-xylo-furano[1,2-d]oxazolidin-2-one was confirmed by elemental analysis, 1H coupled and decoupled 13C NMR and GC-MS (El, DCI).
Abstract: Reaction of equiraolecular amounts of xylose and urea in D2O at 68 °C, monitored by 13C NMR, gave a six carbon xylofuranosyl derivative as the major product. No intermediate in the formation of this monomeric compound was detected. The xylofuranosyl derivative was subsequently isolated and purified from a six week 0.1 molar reaction of xylose and urea in H2O. Its structure, α-d-xylo-furano[1,2-d]oxazolidin-2-one 1, was confirmed by elemental analysis, 1H coupled and decoupled 13C NMR, 1H NMR, IR and DCI-MS. The 1H NMR and GC-MS (El, DCI) of the N-acetyl-di-O-acetyl derivative 2 were in agreement with structure 1.
TL;DR: In this paper, the following acetylene derivatives have been employed: methyl propiolate, ethyl phenylpropiolate and dimethyl acetylenedicarboxylate (6 ).
Patent•
27 Jan 1984
TL;DR: In the prepn. of oxazolidine gp-carrying epoxy resins, which can be neutralised (partly) with (in)organic acids to form water-dilutable binders, the reaction is at 70-90 deg.C..
Abstract: In the prepn. of oxazolidine gp.-carrying epoxy resins, which can be neutralised (partly) with (in)organic acids to form water-dilutable binders, (a) an oxazolidine gp.-contg. OH gp.-free sec. amine of formula (I) (where R1 is or 2-12C (cycli)alkylene or aralkylene; R2 is 1-4C alkyl, H, or the 2 R2 gps. are a ring-forming opt. substd. alkylene gp.; R3 is a (un)satd., opt. ether- or ester gp.-contg. (cyclo)aliphatic or aromatic hydrocarbyl and R4 is H or CH3) is reacted with a hydroxyacrylate at 70-90 deg.C. The prod. is then reacted with carboxylic acid anhydride, at 70-100 deg.C., opt. in an aprotic solvent, to form semi-ester of formula (X)2-N-CH2-CH2-COO-R5-OOC-R6-COOH (II) (where (X2)-N- is amine gp. (I); R5 is alkylene- or polyalkylene ether residue; R6 is residue of an anhydride-forming carboxylic acid). The semi-ester (II) is then reacted with an epoxy resin, contg. at least 2 1,2-epoxy gps./mol. and having epoxide equiv. wt. 170-100, up to acid index less than 3 mg KOH/g. The reaction is at 70-90 deg.C., in water-miscible organic solvent, opt. together or consecutively with satd. and/or unsatd. carboxylic acids and/or prim. and/or sec. alkyl- and/or alkanolamines. Reactant ratios are such that the epoxide gp. face and -prod. has amine no. at least 35 (50-150) mg KOH/g. The binders are used esp. in cathodic electrodip lacquering and in the prepn. of pigment pastes. (First major equivalent to AT8200391-A).