Method for the preparation of trimethylcyclohexyl-alkan-3-ols containing a high proportion of trans isomers

制备含有一定比例式D反式异构体的三甲基环己基-烷-3-醇或一些这样的三甲基环己基-烷-3-醇的混合物的方法，其中R＝H、甲基、乙基、正-丙基、异丙基、正丁基、异丁基或叔丁基和R1＝甲基、乙基、正-丙基、异丙基、正丁基、异丁基或叔丁基，其中在镍催化剂存在下，优选在阮内镍存在下，不存在催化活性量的亚铬酸铜，催化氢化相应的式B化合物，其中每种情况下R和R1定义如上。 Production of 1-(2,2,6-trimethylcyclohexyl)-3-alkanols containing trans isomers (D) comprises hydrogenating corresponding enones (B) in the presence of a nickel catalyst in the absence of copper chromite. Production of 1-(2,2,6-trimethylcyclohexyl)-3-alkanols containing trans isomers of formula D comprises hydrogenating corresponding enones of formula B in the presence of a nickel catalyst in the absence of copper chromite. R = H or 1-4C alkyl; R1 = 1-4C alkyl. An Independent claim is also included for production of a perfume composition by preparing one or more 1-(2,2,6-trimethylcyclohexyl)-3-alkanols as above, optionally isolating and/or purifying the products and mixing them with conventional perfume ingredients.