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    • 54. 发明授权
    • Process for preparing 2-acyl-5-substituted thiatetrahydrofuran-4-ones
    • 2-酰基-5-取代的四氢呋喃-4-酮的制备方法
    • US4138413A
    • 1979-02-06
    • US887631
    • 1978-03-17
    • Braja D. MookherjeeWilliam J. EversAlfred E. Goossens
    • Braja D. MookherjeeWilliam J. EversAlfred E. Goossens
    • A24B15/40C07D307/32C07D307/64C11B9/00
    • C07D307/32A24B15/406C07D307/64C11B9/0076
    • Described are 2-acyl-5-substituted thiatetrahydrofuran-4-ones having the generic structure: ##STR1## wherein R.sub.1, R.sub.2, R.sub.1 ' and R.sub.2 ' are the same or different and each represents hydrogen or methyl and wherein R.sub.3 represents one of C.sub.1 -C.sub.9 alkyl, benzyl, phenyl, substituted or unsubstituted allyl having the structure: ##STR2## substituted or unsubstituted 3-furyl having the structure: ##STR3## (wherein R.sub.4 and R.sub.8 are the same or different and each represents hydrogen or methyl) hydroxy alkyl, oxoalkyl, hydroxycycloalkyl or oxocycloalkyl having the structure: ##STR4## (wherein R.sub.5 and R.sub.6, taken separately, represent hydrogen or C.sub.1 -C.sub.3 alkyl or R.sub.5 and R.sub.6, taken together, complete a cycloalkyl group and wherein Q is one of the moieties: ##STR5## prepared according to the process of dimerizing one or more alpha, beta-alkane dione(s) to form one or more alpha, beta-alkane dione dimer(s) having the structure: ##STR6## and reacting the said alkane dione dimer(s) in acidic medium and in the presence of a solvent with a mercaptan, having the structure:R.sub.3 SHthe 2-acyl-5-substituted thiatetrahydrofuran-4-ones of our invention have organoleptic properties which make them useful for augmenting or enhancing the aroma or flavor of foodstuffs, tobaccos and the aroma of perfumes and perfumed articles.
    • 描述了具有以下通用结构的2-酰基-5-取代的硫代四氢呋喃-4-酮:其中R 1,R 2,R 1'和R 2'相同或不同,各自表示氢或甲基,并且其中R 3表示C1 -C9烷基,苄基,苯基,具有以下结构的取代或未取代的烯丙基:具有以下结构的取代或未取代的3-呋喃基:其中R 4和R 8相同或不同,各自表示氢或甲基)羟基 烷基,氧代烷基,羟基环烷基或氧代环烷基,其结构为:其中R 5和R 6分别代表氢或C 1 -C 3烷基或R 5和R 6一起形成环烷基,其中Q是部分之一 :根据使一种或多种α,β-烷烃二酮二聚形成一种或多种具有以下结构的α,β-烷烃二酮二聚体的方法制备:< IMAGE>并使所述烷烃 二酸二聚体在酸性介质中并在溶剂存在下进行 具有硫醇,具有以下结构: