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    Preparation of 3,4,5,6,7,8-hexahydrocoumarin
    4.
    发明授权
    Preparation of 3,4,5,6,7,8-hexahydrocoumarin 失效
    制备3,4,5,6,7,8-六氢香豆素

    公开(公告)号：US3925422A

    公开(公告)日：1975-12-09

    申请号：US33624373

    申请日：1973-02-27

    Applicant: STAMICARBON

    Inventor： SCHAAFSMA SIJBRANDUS E ,  DEUMENS JOHANNES J M

    IPC: C07D311/74

    CPC classification number: C07D311/74

    Abstract: A process for preparing 3,4,5,6,7,8-hexahydrocoumarin is disclosed, wherein 2-( Beta -carboxyethyl)-cyclohexanone is heated in the presence of catalytic amount of a strong acid having a atmospheric boiling point above 200*C at a temperature of 140*-245*C and a pressure of 6-200 mm Hg. The hexahydrocoumarin product may be dehydrogenated to form dihydrocoumarin which is used in the perfume industry.

    Abstract translation: 公开了一种制备3,4,5,6,7,8-六氢香豆素的方法，其中2-（β-羧乙基） - 环己酮在催化量的常压沸点高于200℃的强酸存在下被加热 温度为140〜-245℃，压力为6〜200mmHg。

    Preparation of alkylated or non-alkylated dihydrocoumarin together with the corresponding alkylated, or non-alkylated, coumarin
    5.
    发明授权
    Preparation of alkylated or non-alkylated dihydrocoumarin together with the corresponding alkylated, or non-alkylated, coumarin 失效
    与相应的烷基化或非烷基化的香豆素一起制备烷基化或非烷基化二氢香豆素

    公开(公告)号：US3891678A

    公开(公告)日：1975-06-24

    申请号：US39151673

    申请日：1973-08-24

    Applicant: STAMICARBON

    Inventor： VERHEIJEN EGIDIUS J M ,  THOMA JOZEF A ,  DEUMENS JOHANNES J M

    IPC: B01J23/00 ,  C07B61/00 ,  C07D311/00 ,  C07D311/06 ,  C07D311/08 ,  C07D311/10 ,  C07D311/20 ,  C07D7/26

    CPC classification number: C07D311/20 ,  C07D311/06 ,  C07D311/08

    Abstract: A process for dehydrogenating hexahydrocoumarin or alkylated derivatives thereof is disclosed, wherein the selection of specific process conditions allows substantial amounts of coumarin or alkylated derivatives thereof to be produced along with dihydrocoumarin or alkylated derivatives thereof. The hexahydrocoumarin or derivatives are contacted with the catalyst at about the dehydrogenation temperature and then are dehydrogenated in the presence of a Group VIII metal dehydrogenation catalyst in the liquid phase at a temperature of 200*-375*C while removing hydrogen from the reaction zone, and the reaction product contains coumarin or alkylated derivatives thereof in a molar ratio of coumarin compounds:dihydrocoumarin compounds of at least 1:5. Coumarin and dihydrocoumarin, as well as alkylated derivatives thereof, are known compounds which are used in the fragance industry.

    Abstract translation: 公开了一种使六氢香豆素或其烷基化衍生物脱氢的方法，其中特定工艺条件的选择允许与二氢香豆素或其烷基化衍生物一起产生大量的香豆素或其烷基化衍生物。 六氢香豆素或衍生物在约脱氢温度下与催化剂接触，然后在第Ⅷ族金属脱氢催化剂存在下，在液相中，在200-375℃的温度下脱氢，同时从反应区除去氢气， 并且反应产物含有以香豆素化合物：二氢香豆素化合物的摩尔比为至少1:5的香豆素或其烷基化衍生物。

    Preparation of (2-cyanoethyl) ketones
    6.
    发明授权
    Preparation of (2-cyanoethyl) ketones 失效
    （2-氰基乙基）酮的制备

    公开(公告)号：US3686262A

    公开(公告)日：1972-08-22

    申请号：US3686262D

    申请日：1970-09-15

    Applicant: STAMICARBON

    Inventor： GROEN SIEMEN H ,  DEUMENS JOHANNES J M

    IPC: C07C255/17 ,  C07C20060101 ,  C07C67/00 ,  C07C253/00 ,  C07C255/61 ,  C07C121/02 ,  C07C121/34

    CPC classification number: C07C255/00

    Abstract: A PROCESS FOR THE PREPARATION OF (2-CYANOETHYL) KETONES BY THE HYDROLYSIS OF THE CORRESPONDING (2-CYANOETHYL)-N-SUBSITUTED KETOIMINE WITH THE SUBSEQUENT RECOVERY OF A PRIMARY AMINE, THE PRIMARY AMINE BOILING AT A LOWER TEMPERATURE THAN WATER AND/OR FORMING WITH WATER AN AZEOTROPE BOILING AT A LOWER TEMPERATURE THAN WATER AND CARRYING ON ITS NITROGEN ATOM THE SAME GROUP AS THAT OF THE NITROGEN ATOM OF THE CORRESPONDING KETOIMINE IS DISCLOSED. WHEN THE RESULTING KETONE IS 5-CYANOPENTANONE-2 THIS MAY BE USED AS A STARTING PRODUCT FOR THE PREPARATION OF A-PIPECOLINE.

    Esterification of polyvalent alkanols with nitric acid in liquid sulphur dioxide
    7.
    发明授权
    Esterification of polyvalent alkanols with nitric acid in liquid sulphur dioxide 失效
    用硝酸在液态二氧化硫中酯化多元链烷醇

    公开(公告)号：US3316289A

    公开(公告)日：1967-04-25

    申请号：US58174066

    申请日：1966-09-26

    Applicant: STAMICARBON

    Inventor： DOESBURG JOHAN T SEMEYNS DE VR ,  DEUMENS JOHANNES J M

    IPC: C07C201/02

    CPC classification number: C07C201/02 ,  C07C203/04

    Abstract: 1,138,360. Nitric esters of polyalkanols. STAMICARBON N.V. 26 Sept., 1966 [1 Oct., 1965], No. 42957/66. Heading C2C. Polyhydric alkanols are esterified with nitric acid by reacting with a nitrating acid in a liquid sulphur dioxide medium. Glycerol di- and trinitrates, ethylene glycol dinitrate and diethylene glycol dinitrate are specified and the nitrating acid is a mixture of nitric and sulphuric acid or anhydride with a preferred nitric acid content of 38-43 mol. per cent. The autogenous oxidation of liquid sulphur dioxide removes the heat generated during esterification.

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