Patent ID: 8674143
Filing Date: 2014-03-18
Classification: A23L,C07C,C11B

Abstract:
1. A method of preparing 1-ethynyl-3,3-dimethylcyclohexan-1-ol comprising (a) reducing dimedone (5,5-dimethylcyclo-hexane-1,3-dione) to 3,3-dimethycyclo-hexan-1-one by hydrogenation with catalytic amounts of a noble metal catalyst in a polar solvent and optionally in the presence of an acid to produce 3,3-dimethylcyclohexane-1-one, and (b) ethynylating the 3,3-dimethylcyclohexanone with ethyne in the presence of catalytic amounts of a base in liquid ammonia to produce 1-ethynyl-3,3-dimethyl-1-cyclohexanol.