Process for the production of 8 .alpha., 12-oxido-13,14,15,16-tetranorlabdane
AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorsGeorg Knuebel, Andreas Bomhard, Ulf-Armin Schaper, Theo Stalberg, Thomas Markert
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Abstract
In a process for the production of 8.alpha.,12-oxido-13,14,15,16-tetranorlabdane by dehydration of 8.alpha.,12-dihydroxy-13,14,15,16-tetranorlabdane (diol), wherein the diol is subjected to cyclizing dehydration in the presence of 5 to 80% by weight, based on the diol, of at least one alumino layer silicate selected from K catalysts which have an acid charge of less than 100 mval/100 g.
Claims17
In a process for the production of 8.alpha.,12-oxido-13,14,15,16-tetranorlabdane by dehydration of 8.alpha.,12-dihydroxy-13,14,15,16-tetranorlabdane (diol), the improvement wherein said diol is subjected to cyclizing dehydration in the of presence of from about 5 to 80% weight, based on the diol, of a catalyst consisting of at least one alumino layer silicate selected from the group consisting of K catalysts which have an acid charge of less than 100 mval/100 g.
In a process for the production of 8.alpha.,12-oxido-13,14,15,16-tetranorlabdane by dehydration of 8.alpha.,12-dihydroxy-13,14,15,16-tetranorlabdane (diol), the improvement wherein said diol is subjected to cyclizing dehydration at a temperature of from about 20.degree. to about 130.degree. C. in the presence of from about 15 to about 35% by weight, based on the diol, of a catalyst consisting of at least one alumino layer silicate selected from the group consisting of K catalysts which have an acid charge of less than 80 mval/100 g, and in the presence of a solvent, and wherein water formed during the cyclizing dehydration reaction is removed by azeotropic distillation.
Dependencies are inferred from the claim text.