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    • 78. 发明授权
    • Preparation of acylated imidazoles
    • 酰化咪唑的制备
    • US4924000A
    • 1990-05-08
    • US321110
    • 1989-03-09
    • Michael HesseWolfgang HoelderichToni DocknerHermann Koehler
    • Michael HesseWolfgang HoelderichToni DocknerHermann Koehler
    • B01J21/00B01J21/04B01J21/06B01J21/08B01J23/20B01J27/18B01J29/04C07B61/00C07D233/54C07D233/64
    • C07D233/64
    • Acylated imidazoles of the formula ##STR1## where R.sup.1 and R.sup.3 are each H, alkyl of from 1 to 12 carbon atoms, alkenyl of from 1 to 12 carbon atoms, aryl, aralkyl or alkylaryl, R.sup.4 is H, alkyl of from 1 to 12 carbon atoms, alkenyl of from 1 to 12 carbon atoms, aryl, aralkyl or alkylaryl, and R.sup.5 is alkyl of from 1 to 12 carbon atoms, alkenyl of from 1 to 12 carbon atoms, aryl, aralkyl, alkylaryl or carboxyl, are prepared by reacting imidazoles of the formula ##STR2## where R.sup.1, R.sup.2 and R.sup.3 are each alkyl of from 1 to 12 carbon atoms, alkenyl of from 1 to 12 carbon atoms, aryl, aralkyl or alkylaryl, at least one of the radicals R.sup.1, R.sup.2 and R.sup.3 being hydrogen, and R.sup.4 is H, alkyl of from 1 to 12 carbon atoms, alkenyl of from 1 to 12 carbon atoms, aryl, aralkyl or alkylaryl, with widely used acylating agents of the formula ##STR3## where R.sup.5 is as defined above and Y is halide, alkoxy, acyloxy or hydroxyl, in the presence of acidic metal oxides and/or phosphates, preferably in the gas phase.
    • 其中R 1和R 3各自为H,具有1至12个碳原子的烷基,1至12个碳原子的烯基,芳基,芳烷基或烷基芳基,R 4为H,1至12的烷基, 碳原子,1至12个碳原子的烯基,芳基,芳烷基或烷基芳基,R5是1至12个碳原子的烷基,1至12个碳原子的烯基,芳基,芳烷基,烷基芳基或羧基, 使式(Ia)的咪唑与R1,R2和R3各自为1至12个碳原子的烷基,1至12个碳原子的烯基,芳基,芳烷基或烷基芳基,基团R1,R2和 R3为氢,R4为H,1至12个碳原子的烷基,1至12个碳原子的烯基,芳基,芳烷基或烷基芳基,以及广泛使用的通式为“IMAGE”的酰化剂,其中R5如上定义 在酸性金属氧化物和/或磷酸盐的存在下,优选在气相中,Y是卤化物,烷氧基,酰氧基或羟基。
    • 80. 发明授权
    • Preparation of ketones
    • 酮的制备
    • US4866210A
    • 1989-09-12
    • US144372
    • 1988-01-15
    • Wolfgang HoelderichLeopold HupferKurt Schneider
    • Wolfgang HoelderichLeopold HupferKurt Schneider
    • C07C45/65C07C45/67
    • C07C45/65C07C45/673C07C45/676Y02P20/582
    • Ketones of the formula ##STR1## where R.sup.1 to R.sup.3 are each hydrogen and R.sup.1 to R.sup.4 are each alkyl of 1 to 12 carbon atoms, cycloalkyl of 4 to 8 carbon atoms, aryl, aralkyl or alkylaryl, which each in turn may be substituted, or R.sup.1 and R.sup.2 and R.sup.3 together with the carbon atoms to which they are bonded form a cycloalkane, are prepared by reacting ketones of the formula ##STR2## where one of R.sup.1, R.sup.2, R.sup.3 and R.sup.5 is hydroxyl, alkoxy or carboxyl while the remaining R.sup.1 to R.sup.4 have the abovementioned meanings, with hydrogen in the presence of acid catalysts supporting one or more hydrogenation components, zeolites of the pentasil type being particularly suitable.
    • 其中R 1至R 3各自为氢且R 1至R 4各自为具有1至12个碳原子的烷基,4至8个碳原子的环烷基,芳基,芳烷基或烷基芳基的式“IMAGE”的酮,其各自依次可被取代, 或者R 1和R 2和R 3与它们所键合的碳原子一起形成环烷烃,是通过使下式的酮反应制备的:其中R1,R2,R3和R5之一是羟基,烷氧基或羧基,而其余的 R1至R4具有上述含义,在负载一种或多种氢化组分的酸催化剂存在下用氢气,pentasil型沸石是特别合适的。