申请人:Givaudan Corporation
公开号:US04892966A1
公开(公告)日:1990-01-09
The invention is concerned with a novel process for the manufacture of compounds of the formula ##STR1## wherein R.sup.1 signifies C.sub.1-5 -alkyl, especially methyl, ethyl, propyl or isopropyl, and the radicals R.sup.2 each independently represent hydrogen or C.sub.1-5 -alkyl, especially hydrogen or methyl, ethyl, propyl or isopropyl. The process is characterized in that a compound of the formula ##STR2## wherein R stands for C.sub.1-4 -alkoxy, chlorine, bromine or C.sub.1-4 -alkanoyloxy, R.sup.1 and R.sup.2 have the above significance and R.sup.3 represents C.sub.1-4 -alkyl. is hydrolyzed and subjected to an aldol condensation and, where R=C.sub.1-4 -alkoxy, the reaction product is subsequently subjected to an acid treatment. The compounds I are for the most part known flavoring substances.
这项发明涉及一种用于制备以下化合物的新型工艺:其中R.sup.1表示C.sub.1-5-烷基,特别是甲基、乙基、丙基或异丙基,基团R.sup.2分别独立地代表氢或C.sub.1-5-烷基,特别是氢或甲基、乙基、丙基或异丙基。该工艺的特点在于,化合物的公式为:其中R代表C.sub.1-4-烷氧基、氯、溴或C.sub.1-4-烷酰氧基,R.sup.1和R.sup.2具有上述含义,R.sup.3代表C.sub.1-4-烷基。经水解和醛缩反应处理化合物后,其中R=C.sub.1-4-烷氧基时,反应产物随后经酸处理。这些化合物I大多数是已知的调味物质。