摘要:
There are disclosed high yield and high productivity processes for preparing 3-hydroxyglutaronitrile by reacting allyl cyanide epoxide with a basic aqueous solution of a cyanide source.
摘要:
The present invention relates to a process for preparing (R)-4-cyano-3-hydroxybutyric acid ester derivatives and more particularly, to a process for preparing optically pure (R)-4-cyano-3-hydroxybutyric acid ester derivatives expressed by formula (1) in high yield by performing cyanation and sequential esterification of (S)-3,4-epoxybutyric acid salt as a starting material. In said formula, R represents linear or branched alkyl group with 1∩5 carbon atoms or benzyl group.
摘要:
It is aimed at to produce 1,4-dicyano-2-butene from 2-butene-1,4-diol and/or 3-butene-1,2-diol and hydrogen cyanide with a high reaction velocity and good selectivity. 2-Butene-1,4-diol and/or 3-butene-1,2-diol are (is) reacted with hydrogen cyanide in the presence of a catalyst comprising a cuprous halide and a non-aromatic organic amine hydrohalide.
摘要:
It is aimed at to produce 1,4-dicyano-2-butene from 2-butene-1,4-diol and/or 3-butene-1,2-diol and hydrogen cyanide with a high reaction velocity and good selectivity. 2-Butene-1,4-diol and/or 3-butene-1,2-diol are (is) reacted with hydrogen cyanide in the presence of a catalyst comprising a cuprous halide and a non-aromatic organic amine hydrohalide.
摘要:
A process for making a water-soluble β-hydroxynitrile. A 1,2-epoxide and an inorganic cyanide salt are reacted in a solvent having aqueous methanol and a buffer therein to form β-hydroxynitrile. The buffer substantially inhibits the information of reaction products other than β-hydroxynitrile. Optionally, water may be removed from the β-hydroxynitrile by azeotropic distillation with acetonitrile and subsequently purified via vacuum distillation and filtraton.
摘要:
Die vorliegende Erfindung bezieht sich auf ein Verfahren zur Herstellung einer farbstabilen, wässrigen Dimethylaminoacetonitril-Lösung ausgehend von einer Formaldehyd-Quelle, Dimethylamin und Blausäure, wobei das Reaktionsgemisch bereits vor der Umsetzung 2,4-Diamino-6-phenyl-1,3,5-triazin (Benzoguanamin) in einer Konzentration von 0.001 bis 5 Gew.-%, bezogen auf Formaldehyd, enthält und die Ausgangssubstanzen stöchiometrisch oder in einem Verhältnis von 0.98 - 1.02 Mol Formaldehyd und 0.95 - 1.10 Mol Dimethylamin je Mol Blausäure eingesetzt werden. Das resultierende Produkt bleibt ohne weiteren Reinigungsschritt auch bei längerer Lagerung farbstabil.
摘要:
A process for the preparation of α-cyanobenzyl esters of cyclopropane carboxylic acids and substituted alkanoic acids by treating a carboxylic acid and a benzaldehyde with a metal cyanide, followed by treatment with a sulfonyl halide.