Method for producing macrocyclic ketones by means of dieckmann condensation in the gas phase
    103.
    发明申请
    Method for producing macrocyclic ketones by means of dieckmann condensation in the gas phase 有权
    通过在气相中的甲基丙酮缩合制备大环酮的方法

    公开(公告)号:US20050256341A1

    公开(公告)日:2005-11-17

    申请号:US10519549

    申请日:2003-07-10

    摘要: The invention relates to a method for producing macrocyclic ketones of general formula (I) by direct cyclisation of compounds of general formula (II) in the gas phase on a heterogeneous catalyst. In general formula (I), X represents a monounsaturated or polyunsaturated or saturated C10-C17 alkyl radical which can be optionally substituted by a C1-C6 alkyl radical, and in general formula (II), R1, R2 can respectively be the same or different and represent hydrogen or C1-C6 alkyl, and has the above-mentioned designation.

    摘要翻译: 本发明涉及通过在气相中在非均相催化剂上直接环化通式(II)的化合物来制备通式(I)的大环酮的方法。 在通式(I)中,X表示可以任选被C 1'烷基取代的单不饱和或多不饱和或饱和的C 1 -C 12烷基, 通式(II)中,R 1,R 2可以分别相同或不同,并且R 1,R 2,R 2, 表示氢或C 1 -C 6烷基,并具有上述名称。

    Process for the manufacture of 2-hydroxy-3-methylcyclopent-2-ene-1-one
    105.
    发明授权
    Process for the manufacture of 2-hydroxy-3-methylcyclopent-2-ene-1-one 失效
    2-羟基-3-甲基环戊-2-烯-1-酮的制备方法

    公开(公告)号:US5856582A

    公开(公告)日:1999-01-05

    申请号:US937994

    申请日:1997-09-26

    申请人: Glen Francis Crum

    发明人: Glen Francis Crum

    IPC分类号: C07C45/48 C07C49/105

    CPC分类号: C07C45/48

    摘要: A process for the manufacture of 2-hydroxy-3-methylcyclopent-2-ene-1-one, in which an ester of alpha-methyl glutaric acid and an ester of oxalic acid react in a polar aprotic solvent in the presence of an alkali metal alkoxide to form an intermediate compound which, after removal of said polar aprotic solvent and alcohols formed in the reaction, is hydrolyzed and decarboxylated to form said 2-hydroxy-3-methycyclopent-2-ene-1-one.

    摘要翻译: 制备2-羟基-3-甲基环戊-2-烯-1-酮的方法,其中α-甲基戊二酸的酯和草酸的酸在极性非质子溶剂中在碱的存在下反应 金属醇盐形成中间体化合物,在除去所述极性非质子溶剂和在反应中形成的醇之后,将其水解脱羧以形成所述2-羟基-3-甲基环戊-2-烯-1-酮。

    Acetoacetic acid ester derivatives for the manufacture of
.alpha.-hydroxycarbonyl compounds
    108.
    发明授权
    Acetoacetic acid ester derivatives for the manufacture of .alpha.-hydroxycarbonyl compounds 失效
    乙酰乙酸酯衍生物用于制造α-羟基羰基化合物

    公开(公告)号:US4892966A

    公开(公告)日:1990-01-09

    申请号:US86130

    申请日:1987-07-16

    申请人: Hans J. Wild

    发明人: Hans J. Wild

    摘要: 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.

    摘要翻译: PCT No.PCT / CH86 / 00157 Sec。 371日期1987年7月16日 102(e)日期1987年7月16日PCT提交1986年11月13日PCT公布。 公开号WO87 / 03287 日本1987年6月4日。本发明涉及制备式Ⅰ化合物的新方法,其中R 1表示C 1-5 - 烷基,特别是甲基,乙基,丙基或异丙​​基,基团R 2各自 独立地表示氢或C 1-5 - 烷基,特别是氢或甲基,乙基,丙基或异丙​​基。 该方法的特征在于其中R代表C1-4 - 烷氧基,氯,溴或C1-4 - 烷酰氧基,R1和R2具有上述含义,并且R 3表示C 1-4 - 烷基 。 水解并进行醛醇缩合,并且其中R = C 1-4 - 烷氧基,随后对反应产物进行酸处理。 化合物I是大部分已知的调味物质。

    Cooling bed run in table
    109.
    发明授权
    Cooling bed run in table 失效
    冷却床在桌子上运行

    公开(公告)号:US4809530A

    公开(公告)日:1989-03-07

    申请号:US128038

    申请日:1987-12-03

    CPC分类号: B21B43/003 C07C45/48

    摘要: A rolling mill run-in table has at least two parallel paths extending alongside the receiving end of a cooling bed. First and second slide members extend respectively along each path on the side thereof closest to the cooling bed. First and second unitary lift assemblies extend respectively along the opposite side of each path. Each lift assembly has a side channel opening laterally towards the cooling bed. An underlying operating mechanism alternately adjusts the left assemblies between lowermost positions at which their side channels are closed by the adjacent slide members and aligned with the respective paths to confine product lengths moving axially therealong, and elevated positions at which the side channels are above the receiving paths and clear of the adjacent slide members to accommodate lateral discharge of the product lengths onto the receiving end of the cooling bed.