Diepoxides manufactured by epoxidation of diacetals or diketals from .DELTA..sup.3 -cyclohexene-1,1-dimethanol or its homologues and dialdehydes or diketones which apart from the two aldehyde groups or keto groups only contain hydrocarbon radicals, for example the diepoxide of the formula ##SPC1## The new diepoxides couple good mechanical properties with a significantly higher heat distortion point according to Martens than the known epoxidised diacetals of similar constitution, in which the ace...

Cyclic acetals of 2-epoxy-propoxy-pivaldehydes. They can be used by themselves, if they contain two or more epoxy groups, or as reactive diluents in a mixture with other epoxide resins, and they give mouldings of excellent mechanical properties on curing with amines or acid anhydrides.

Epoxides and acrylonitrile react with spiroacetal diamines of the formula to form a viscous liquid which is a good hardener for epoxy resin intermediates, in the formula R being hydrogen, methyl, or ethyl, and R' being alkyl having one to six carbon atoms. Epoxy resins cured by means of the hardener are flexible, colorless and transparent.

Ketonitriles of the general formula ##SPC1## In which R.sub.1 and R.sub.2 signify alkyl groups with one to four carbon-atoms, R.sub.3 and R.sub.4 are hydrogen atoms or alkyl groups with one to four C-atoms and wherein R.sub.3 and R.sub.4 may also together form a carbocyclic ring preferably with five or six C-atoms and n is zero, 1 or 2 produced by condensing diols of the formula ##SPC2## With cyanaldehydes of the formula wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and n have the same meanings as ...

Tetraoxaspiro(5,5)undecanes of the formula ##SPC1## Wherein A is alkylene of 1-4 carbon atoms, X is O or S and R.sup.1 is alkyl of 2-21 carbon atoms or --(CH.sub.2).sub.n --COOR.sup.2 in which n is 1-3 and R.sup.2 is alkyl of up to 18 carbon atoms, which are stabilizers for polyolefins and other polymers, are produced by reacting pentaerythritol with an aldehyde of the formula R.sup.1 --X--A--CHO or by reacting the corresponding bis-p,p'-alkenyl substituted or bis-p,p'-hydroxyalkyl substituted t...

The preparation of compounds of the following formulas is disclosed: ##SPC1## In these formulas, R is alkyl, W is hydrogen, alkyl, haloalkyl, phenyl, or phenyl substituted with halo, nitro, or carbomethoxy, X is hydrogen or methyl, Y' is hydrogen or carboxyacyl, Z is hydrogen or alkyl, and n is zero, one, or two. These compounds are used as intermediates to make prostaglandins of the dihydro-PGF.sub.1 -type.

This invention provides a process for producing 2-vinyl-1,3-dioxane compounds rapidly and efficiently by contact of a mixture of acrolein and a 1,3-propanediol compound with solid cation exchange resin in acid form. There is further provided a process for conversion of acrolein into 3-(1',3'-dioxane)propionaldehyde derivatives.

5-Bromo-5-nitro-2-alkylsubstituted-1,3-dioxanes, such as 5-bromo-2-methyl-5-nitro-1,3-dioxane, novel antimicrobials with activity against both bacteria and fungi.

The method of preparing 4,4-dimethyldioxane-1,3 consists in the interaction of isobutylene and formaldehyde in an aqueous medium at from 90.degree. to 115.degree. C in the presence of a catalyst, the capacity of which such inorganic salts of mineral acids may be used with the pH value of the aqueous solutions whereof being within 2.2 to 4.5, resulting in the formation of an organic and an aqueous phase containing the end product, followed by the separation of said phases, washing the organic pha...

A method is provided for producing a di-acetal of sorbitol and an aromatic aldehyde wherein an aqueous solution containing a catalytic amount of a mineral acid and sorbitol is formed. Thereafter, an effective amount of an aromatic aldehyde such as benzaldehyde is incrementally admixed into the homogeneous aqueous admixture containing the sorbitol at a rate sufficient to allow a substantially spontaneous reaction to occur between the D-sorbitol and aromatic aldehyde; thus, forming an aqueous slur...