Study on the reactivity and kinetics of primary and secondary amines during epoxy curing by NIR spectroscopy combined with multivariate analysis

Cyclization kinetics of N-benzoyl-N'-(1,2-dimethyl-3-oxo-1-butenyl)thiourea have been studied in aqueous and methanolic solutions of acids and bases. In all cases the cyclization product is 4,5,6-trimethyl-2,5-dihydro-2-thioxopyrimidine or its protonated or deprotonated forms. In dilute methanolic and aqueous hydrochloric acid the substrate reacts in its monoprotonated form. The cyclization in basic media is catalyzed by methoxide or hydroxyl ion and also by primary and secondary amines at such pH values where the catalysis by lyate ion is practically insignificant. Tertiary amines and acetate ion do not catalyze the cyclization.

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Kinetics of CO2 with primary and secondary amines in aqueous solutions—I. Zwitterion deprotonation kinetics for DEA and DIPA in aqueous blends of alkanolamines

Chemical Engineering Science ◽

10.1016/0009-2509(92)80319-8 ◽

1992 ◽

Vol 47 (8) ◽

pp. 2027-2035 ◽

Cited By ~ 73

Author(s):

R.J. Littel ◽

G.F. Versteeg ◽

W.P.M. Van Swaaij

Keyword(s):

Aqueous Solutions ◽

Secondary Amines ◽

Primary And Secondary Amines ◽

Kinetics Of

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Reaction kinetics of COS with primary and secondary amines in alcoholic solutions

The Chemical Engineering Journal and the Biochemical Engineering Journal ◽

10.1016/0923-0467(94)87006-3 ◽

1994 ◽

Vol 55 (1-2) ◽

pp. 53-59

Author(s):

E. Alper ◽

M. Al-Roweih ◽

W. Bouhamra

Keyword(s):

Reaction Kinetics ◽

Secondary Amines ◽

Primary And Secondary Amines ◽

Kinetics Of

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Kinetics of CO2 with primary and secondary amines in aqueous solutions—II. Influence of temperature on zwitterion formation and deprotonation rates

Chemical Engineering Science ◽

10.1016/0009-2509(92)80320-c ◽

1992 ◽

Vol 47 (8) ◽

pp. 2037-2045 ◽

Cited By ~ 80

Author(s):

R.J. Littel ◽

G.F. Versteeg ◽

W.P.M. Van Swaaij

Keyword(s):

Aqueous Solutions ◽

Secondary Amines ◽

Influence Of Temperature ◽

Primary And Secondary Amines ◽

Influence Of Temperature On ◽

Zwitterion Formation ◽

Kinetics Of

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Reaction of arylmethylenemalonaldehydes with some nucleophiles

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19872699 ◽

1987 ◽

Vol 52 (11) ◽

pp. 2699-2709 ◽

Cited By ~ 3

Author(s):

Dalimil Dvořák ◽

Zdeněk Arnold

Keyword(s):

Inorganic Anions ◽

Secondary Amines ◽

Tertiary Amines ◽

Primary And Secondary Amines ◽

Dipolar Structure

Reaction of arylmethylenemalonaldehydes with tributylphosphine and tertiary amines affords compounds of dipolar structure whereas reaction with primary and secondary amines leads to 1,4-addition products. Salts of nucleophilic inorganic anions add to arylmethylenemalonaldehydes under formation of salts of substituted malonaldehydes.

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Some 1-substitution derivatives of 4-aryl-2,3-dihalogeno-1-naphthols

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19840110 ◽

1984 ◽

Vol 49 (1) ◽

pp. 110-121 ◽

Cited By ~ 1

Author(s):

Jiří Křepelka ◽

Drahuše Vlčková ◽

Milan Mělka

Keyword(s):

Thionyl Chloride ◽

Oxirane Ring ◽

Secondary Amines ◽

Two Phase ◽

Lytic Effect ◽

Primary And Secondary Amines ◽

Phase Medium ◽

Chloro Derivatives ◽

Derivatives Of

Alkylation of derivatives of 4-aryl-1-naphthols (I-V) by 2,3-epoxypropyl chloride in methanolic sodium hydroxide gave epoxy derivatives VI, VIII, IX, XI and XII, apart from products of cleavage of the oxirane ring, VII and X. Analogous alkylation of compounds I, IV and V by 2-(N,N-diethylamino)ethyl chloride hydrochloride in a two-phase medium afforded basic ethers XIII to XV. The cleavage of the oxirane ring in compound VI by the action of primary and secondary amines, piperidine and substituted piperazines led to compounds XVI-XXIV. Reaction of thionyl chloride with compounds XXI, XXII and XXIV gave chloro derivatives XXV-XXVII.Exposure of compound XXII to 4-methylbenzenesulfonyl chloride produced compound XXVIII, retaining the secondary alcoholic group. In an antineoplastic screening in vivo none of the compounds prepared had an appreciable activity. Compound XVII, being an analogue of propranolol, was used in the test of isoproterenolic tachycardia, and showed a beta-lytic effect comparable with that of propranol.

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