公开(公告)号：US3870761A

公开(公告)日：1975-03-11

申请号：US27214772

申请日：1972-07-17

Applicant: BASF AG

Inventor： PASEDACH HEINRICH ,  FRIEDERANG ALBRECHT

IPC: C07C35/12 ,  C07C45/00 ,  C07C45/74 ,  C07C49/647 ,  C07C67/00 ,  C07C49/48 ,  C07C29/00

CPC classification number: C07C49/647 ,  C07C35/12 ,  C07C45/74

Abstract: Manufacture of piperitenone by mixing excess mesityl oxide with 10 to 70% by weight aqueous potassium hydroxide solution, heating the mixture to a temperature of between 20*C and the boiling point and introducing the methyl vinyl ketone into the heated mixture. d,1-Menthol is obtained directly, or via a mixture of menthone and isomenthone, from the piperitenone which is obtained in good yield.

Abstract translation: 通过将过量的三甲苯氧化物与10至70重量％的氢氧化钾水溶液混合制备哌嗪酮，将混合物加热至20℃至沸点，并将甲基乙烯基酮引入加热的混合物中。 d，1-薄荷醇直接获得，或通过薄荷酮和异摩酮的混合物从得到的哌嗪酮得到。