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 tetraoxaspirol(5,5)undecanes with a compound of the formula R.sup.1 --XH in which R.sup.1, X and A have the values given above. 20 Claims, No Drawings
Plant growth-regulating compounds of the formula ##STR1## wherein X and Y are separately oxygen, sulfur, N-B where B is hydrogen, lower alkyl, or acyl; R and R' are separately lower alkyl, acyl, amido, or form a cycle with ##STR2## corresponding to the formula ##STR3## in which R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are separately hydrogen, lower alkyl, halogen-substituted lower alkyl, NO.sub.2, hydroxy or lower alkoxy, and A is a single bond or an alkylene chain of 1-4 carbons, or an alkylene chain of 1-4 carbons interrupted by oxygen or N--B' where B' is hydrogen, lower alkyl, lower halogen-aided alkyl, lower hydroxylated alkyl, lower acyl, or a cycle having in common with the preceding cycle 1 or 2 carbon atoms and containing from 3 to 6 carbons, up to 2 oxygens and/or a group N-B, or a cycle corresponding to the formula
Phenolic compounds and methods of producing such phenolic compounds are disclosed, said compounds being of the formula: ##STR1## wherein n' is an integer from 1 to 3, and R.sub.1 is a hydrogen atom, or an alkyl group having 1 to 4 carbon atoms or an acyl group having 1 to 5 carbon atoms. These compounds are suitable as stabilizers for synthetic resins with at least one sulfur compound of the following formulas: ##STR2## wherein R.sub.2 is an alkyl group having 4 to 20 carbon atoms, and ##STR3## wherein R.sub.3 is an alkyl group having 3 to 18 carbon atoms, and R.sub.4 and R.sub.5 each independently is a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, in the ratio (I):(II) of 1:0.5-15 by weight.
Formals of CH.sub.2 OH(CHOH).sub.n CH.sub.2 OH polyols (n=2 to 4) are prepared in less than 15 minutes by heating to about 125.degree. C., a mixture of e.g. sorbitol and paraformaldehyde in slight excess (5 to 10%), in the presence of e.g. sulfuric acid in catalytic quantities. Elution with methanol and filtration yield the pure solid cyclic triformal. The process can be carried in stages, using almost stoichiometric quantities of paraformaldehyde, but without any change in overall heating time.
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.
