Process for making alkyl cyclopentenones
    1.
    发明授权
    Process for making alkyl cyclopentenones 失效
    制备烷基环戊烯酮的方法

    公开(公告)号:US4329508A

    公开(公告)日:1982-05-11

    申请号:US192083

    申请日:1980-09-29

    摘要: A process for making mixed 2- and 3-C.sub.1 -C.sub.10 alkyl-2-cyclopenten-1-ones from a corresponding alkylcyclopentadiene by epoxidation to the oxiranes, hydrolysis to the diols, dehydration of the diols and rearrangement of the resulting mixed alkylcyclopentenones. The resulting product can be used to make methylcyclopentenolone, a synthetic maple flavor.

    摘要翻译: 通过环氧乙烷环氧化制备相应的烷基环戊二烯混合的2-和3- C1-C10烷基-2-环戊烯-1-酮的方法,水解成二醇,脱水二醇并重排所得的混合烷基环戊烯酮。 所得产物可用于制备甲基环戊烯醇,一种合成枫香味。

    Synthesis of (+)-cis-homocaronic acid
    2.
    发明授权
    Synthesis of (+)-cis-homocaronic acid 失效
    (+) - 顺式 - 高碳酸的合成

    公开(公告)号:US4296251A

    公开(公告)日:1981-10-20

    申请号:US150197

    申请日:1980-05-15

    IPC分类号: C07C51/34

    CPC分类号: C07C51/34

    摘要: A process for producing (+)-cis-homocaronic acid from 2-caren-4-ol, 2-caren-4-one, 3-caren-2-ol, or mixtures thereof is disclosed. The reactants are ozonized, the ozonides produced are treated with an oxidizing agent, and the (+)-cis-homocaronic acid is recovered. The oxidizing agent can be hydrogen peroxide in either a basic or an acid medium.

    摘要翻译: 公开了从2-对羟基-4-醇,2-对甲基-4-酮,3-正丁醇或其混合物生产(+) - 顺式 - 高碳酸的方法。 反应物被臭氧化,所生产的臭氧化物用氧化剂处理,并回收(+) - 顺式 - 高碳酸。 氧化剂可以是碱性或酸性介质中的过氧化氢。

    Process for producing lactones from unsaturated carbonyl compounds
    3.
    发明授权
    Process for producing lactones from unsaturated carbonyl compounds 失效
    从不饱和羰基化合物生产内酯的方法

    公开(公告)号:US4309352A

    公开(公告)日:1982-01-05

    申请号:US209645

    申请日:1980-11-24

    申请人: T. L. Ho

    发明人: T. L. Ho

    CPC分类号: C07D315/00 C07C29/40

    摘要: A method for producing an alkyl substituted lactone including the steps of alkylating an unsaturated ketone with a C.sub.1 -C.sub.12 alkyl organometallic reagent such as a Grignard reagent or an alkali metal alkyl, to form an unsaturated alcohol, and oxidatively cleaving the unsaturated alcohol to form the lactone, and recovering the lactone.

    摘要翻译: 一种制备烷基取代的内酯的方法,包括以下步骤:用C1-C12烷基有机金属试剂如格氏试剂或碱金属烷基烷基化不饱和酮,形成不饱和醇,并将不饱和醇氧化裂解形成 内酯,并回收内酯。

    Preparation of (-)-dihydrochrysanthemolactone
    4.
    发明授权
    Preparation of (-)-dihydrochrysanthemolactone 失效
    ( - ) - 二氢菊花内酯的制备

    公开(公告)号:US4296038A

    公开(公告)日:1981-10-20

    申请号:US143299

    申请日:1980-04-24

    申请人: T. L. Ho Zia U. Din

    发明人: T. L. Ho Zia U. Din

    IPC分类号: C07D311/94

    CPC分类号: C07D311/94

    摘要: A four-step process for producing (-)-dihydrochrysanthemolactone from 2-caren-4-one is disclosed. The four steps in order are methylating 2-caren-4-one, oxidizing, methylating the tautomeric mixture resulting from the oxidation, and finally lactonizing the single hydroxy acid resulting from the second methylation. Additionally, three novel intermediate compounds that are produced by the steps in the process are disclosed.

    摘要翻译: 公开了从2-对羟基-4-酮生产( - ) - 二氢菊花内酯的四步法。 顺序的四个步骤是甲基化2-对甲基-4-酮,氧化,甲基化由氧化产生的互变异构体混合物,最后将由第二次甲基化产生的单一羟基酸内酯化。 另外,公开了通过本方法中的步骤制备的三种新型中间体化合物。

    Synthesis of menthofuran
    5.
    发明授权
    Synthesis of menthofuran 失效
    呋喃丹的合成

    公开(公告)号:US4240969A

    公开(公告)日:1980-12-23

    申请号:US72182

    申请日:1979-09-04

    摘要: A new process for synthesizing menthofuran is disclosed. Said process comprises epoxidizing isopulegol to form the new compound isopulegol epoxide. The epoxide is then oxidized to form isopulegone epoxide which can be cyclodehydrated to form menthofuran.

    摘要翻译: 公开了一种合成薄荷呋喃的新工艺。 所述方法包括环氧化异ule醇以形成新的化合物异双环醇。 然后氧化环氧化物以形成异环形成环氧化物,其可以被环化脱水形成呋喃丹。

    Producing substituted 2-cyclopentenones
    6.
    发明授权
    Producing substituted 2-cyclopentenones 失效
    生产取代的2-环戊烯酮

    公开(公告)号:US4304942A

    公开(公告)日:1981-12-08

    申请号:US152137

    申请日:1980-05-21

    申请人: T. L. Ho

    发明人: T. L. Ho

    摘要: A process is provided for producing substituted 2-cyclopentenones represented by the general formula: ##STR1## where R.sup.1, R.sup.2, R.sup.3, R.sup.4, and R.sup.5 are hydrogen or lower aliphatic hydrocarbyl groups. The process comprises treating a nitroalkane with a substituted acrylic acid ester in the presence of a base, followed by saponification, to yield a substituted 4-nitropentanoic acid which acid is then treated with strong acid under dehydrative conditions to yield the subject 2-cyclopentenone.

    摘要翻译: 提供了制备由以下通式表示的取代的2-环戊烯酮的方法:其中R 1,R 2,R 3,R 4和R 5是氢或低级脂族烃基。 该方法包括在碱的存在下用取代的丙烯酸酯处理硝基烷烃,然后皂化,得到取代的4-硝基戊酸,然后用强酸在脱水条件下处理该酸,得到对象2-环戊烯酮。