Described is a novel genus of compounds defined according to the structure: ##STR1## wherein Z represents hydrogen, MgX and the moiety having the structure: ##STR2## and X represents chlor, bromo, or iodo; as well as 5-isopropyl-8-methyl-5,8-nonadien-2-one; uses of same as intermediates in a process for producing isosolanone and solanone; and organoleptic uses of 5-isopropyl-8-methyl-5,8-nonadien-2-one and 2,6-dimethyl-5-methylene-1-hepten-4-ol. The novel process of our invention involved the steps of: (i) formation of the compound having the structure: ##STR3## by means of reacting 3-methyl-2-methylenebutanal with the compound having the structure: ##STR4## (ii) acid hydrolysis of the resulting compound in order to form 2,6-dimethyl-5-methylene-1-heptene-4-ol; (iii) reaction of 2,6-dimethyl-5-methylene-1-hepten-4-ol with methyl aceto acetate in order to form 2,6-dimethyl-5-methylene-1-hepten-4-yl aceto acetate or, directly, 5-isopropyl-8-methyl-5,8-nonadiene-2-one; (iv) reacting 2,6-dimethyl-5-methylene-1-hepten-4-yl aceto acetate in the presence of an appropriate catalyst to form the 5-isopropyl-8-methyl-5,8-nonadiene-2-one; and (v) isomerizing the 5-isopropyl-8-methyl-5,8-nonadien-2-one in order to form a mixture of solanone and the isosolanone or 5-isopropyl-8-methyl-5,8-nonadiene-2-one.
描述了一种新的化合物属的结构:##STR1## 其中 Z 代表氢、MgX 和具有结构的部分:##STR2##,X 代表
氯、
溴或
碘;以及 5-异丙基-8-甲基-5,8-壬二烯-2-酮;以及这些化合物在生产
异索兰酮和索兰酮过程中作为中间体的用途;以及 5-异丙基-8-甲基-5,8-壬二烯-2-酮和 2,6-二甲基-5-亚甲基-
1-庚烯-4-醇的感官用途。我们的新工艺涉及以下步骤:(i) 通过将
3-甲基-2-亚甲基丁醛与具有结构的化合物反应,形成具有结构的化合物:##STR3##;(ii) 对所得化合物进行酸
水解,形成 2,6-二甲基-5-亚甲基-
1-庚烯-4-醇;(iii) 将 2,6-二甲基-5-亚甲基-
1-庚烯-4-醇与
乙酰乙酸甲酯反应,形成 2,6-二甲基-5-亚甲基-
1-庚烯-4-基
乙酸乙酯或直接形成 5-异丙基-8-甲基-5,8-壬二烯-2-酮;(iv) 在适当催化剂的存在下,将 2,6-二甲基-5-亚甲基-
1-庚烯-4-基
乙酸乙酯反应,形成 5-异丙基-8-甲基-5,8-壬二烯-2-酮;以及 (v) 将 5-异丙基-8-甲基-5,8-壬二烯-2-酮异构化,形成索兰酮和
异索兰酮或 5-异丙基-8-甲基-5,8-壬二烯-2-酮的混合物。