Process for the preparation of 2-ethyl-1,3-hexane diol
    4.
    发明授权
    Process for the preparation of 2-ethyl-1,3-hexane diol 失效
    2-乙基-1,3-己二醇的制备方法

    公开(公告)号:US5663452A

    公开(公告)日:1997-09-02

    申请号:US596177

    申请日:1996-05-03

    摘要: The invention relates to a new, technically simple but efficient process, with a good yield, for the preparation of 2-ethyl-1,3-hexane diol from n-butyraldehyde by aldol condensation in the presence of an alkali metal hydroxide or alkali earth metal hydroxide catalyst. To promote the reaction and to improve its controllability, a neutral phase-transfer catalyst is additionally used in the process according to the invention. 2-Ethyl-1,3-hexane diol is used in insecticides and, for example, in the preparation of polyesters.

    摘要翻译: PCT No.PCT / FI94 / 00387 Sec。 371日期:1996年5月3日 102(e)日期1996年5月3日PCT提交1994年9月2日PCT公布。 出版物WO95 / 07254 日期1995年3月16日本发明涉及一种新的技术上简单但有效的方法,具有良好的收率,用于在碱存在下通过醛醇缩合从正丁醛中制备2-乙基-1,3-己二醇 金属氢氧化物或碱土金属氢氧化物催化剂。 为了促进反应并提高其可控性,在本发明的方法中另外使用中性相转移催化剂。 2-乙基-1,3-己二醇用于杀虫剂,例如用于制备聚酯。

    Process for the preparation of polyvalent alcohols
    5.
    发明授权
    Process for the preparation of polyvalent alcohols 失效
    制备多元醇的方法

    公开(公告)号:US06255541B1

    公开(公告)日:2001-07-03

    申请号:US09319572

    申请日:1999-06-09

    IPC分类号: C07C2704

    摘要: The invention relates to a process for the preparation of polyvalent alcohols by hydrogenation of an aldehyde. According to the invention said aldehyde is obtained by aldolisation reaction of an aldehyde containing an &agr; hydrogen atom and having the formula R1CHO, or the mixture of said aldehyde with a second different aldehyde having the formula or R2CHO, wherein R1 is selected from alkyl having 1-12 carbon atoms, cycloalkyl, aryl and aralkyl having 1-14 carbon atoms, and R2 is selected from H, alkyl having 1-12 carbon atoms, cycloalkyl, aryl and aralkyl having 1-14 carbon atoms, said aldolisation being carried out in the presence of a weak base anion exchange resin, and the hydrogenation being carried out in the presence of a solvent and a hydrogenation catalyst.

    摘要翻译: 本发明涉及通过醛的氢化制备多元醇的方法。 根据本发明,所述醛是通过含有α氢原子并具有式R 1 CHO的醛的醛缩合反应或所述醛与具有下式的R 2 CHO的第二种不同的醛的混合物获得的,其中R 1选自具有1 -12个碳原子,环烷基,芳基和具有1-14个碳原子的芳烷基,R2选自H,具有1-12个碳原子的烷基,具有1-14个碳原子的环烷基,芳基和芳烷基,所述醛醇化在 存在弱碱性阴离子交换树脂,并且在溶剂和氢化催化剂存在下进行氢化。

    Process for the preparation of 3-substituted thiophenes
    6.
    发明授权
    Process for the preparation of 3-substituted thiophenes 失效
    3-取代噻吩的制备方法

    公开(公告)号:US5512685A

    公开(公告)日:1996-04-30

    申请号:US244379

    申请日:1994-12-20

    CPC分类号: C07D333/08

    摘要: The invention relates to a process for the preparation of 3-substituted thiophenes in which the substituent is a C.sub.4 -C.sub.18 -alkyl group. According to the invention, the preparation is carried out by allowing an alkali metal salt of a C.sub.4 -C.sub.18 -alkyl-succinic acid to react with a compound of sulfur and phosphorus, e.g. tetraphosphorus decasulfide, in an organic solvent at a temperature of 100.degree.-180.degree. C., the product obtained being 3-(C.sub.4 -C.sub.18 -alkyl)thiophene. The said reaction may be the last step in a process in which the initial material is maleic acid anhydride with which .alpha.-C.sub.4 -C.sub.18 -alkene is combined so that C.sub.4 -C.sub.18 -alkenylsuccinic acid anhydride is obtained, whereafter this is hydrogenated catalytically to produce C.sub.4 -C.sub.18 -alkylsuccinic acid anhydride. This is thereafter reacted with an alkali metal hydroxide so that an alkali salt of the C.sub.4 -C.sub.18 -alkylsuccinic acid is obtained, which salt is reacted with a compound of sulfur and phosphorus to produce 3-(C.sub.4 -C.sub.18 -alkyl)thiophene, which constitutes the final product.

    摘要翻译: PCT No.PCT / FI92 / 00333 Sec。 371日期1994年12月20日第 102(e)日期1994年12月20日PCT提交1992年12月8日PCT公布。 出版物WO93 / 12106 日期:1993年6月24日。本发明涉及一种制备3-取代噻吩的方法,其中取代基是C4-C18-烷基。 根据本发明,通过使C4-C18-烷基 - 琥珀酸的碱金属盐与硫和磷的化合物反应来进行制备。 十四硫化四磷,在有机溶剂中,在100-180℃的温度下,得到的产物是3-(C 4 -C 18 - 烷基)噻吩。 所述反应可以是其中初始材料是马来酸酐与其中α-C 4 -C 18 - 烯烃组合使得得到C 4 -C 18 - 烯基琥珀酸酐的方法中的最后一个步骤,然后将其氢化催化以产生 C4-C18-烷基琥珀酸酐。 然后与碱金属氢氧化物反应,得到C4-C18-烷基琥珀酸的碱金属盐,该盐与硫和磷的化合物反应生成3-(C 4 -C 18烷基)噻吩,其中 构成最终产品。