Preparation of .alpha.,.beta.-unsaturated nitriles
    1.
    发明授权
    Preparation of .alpha.,.beta.-unsaturated nitriles 失效
    制备α,β-不饱和腈

    公开(公告)号:US4315869A

    公开(公告)日:1982-02-16

    申请号:US143446

    申请日:1980-04-24

    IPC分类号: C07C255/34 C07C120/10

    CPC分类号: C07C255/00

    摘要: .alpha.,.beta.-Unsaturated nitriles are prepared by reacting an aldehyde with formamide in the presence of an acid and the presence or absence of a non-aromatic solvent to give an N-alkenyl-formamide, which is then passed, in the gas phase, over a dehydration catalyst at an elevated temperature.The nitriles obtainable by the process of the invention are valuable starting materials for the preparation of dyes, crop protection agents, plasticizers and drugs.

    摘要翻译: α,β-不饱和腈通过使醛与甲酰胺在酸的存在下和存在或不存在非芳族溶剂下反应制备,得到N-烯基 - 甲酰胺,然后在气相中通过, 在高温下脱水催化剂。 通过本发明的方法可获得的腈是用于制备染料,作物保护剂,增塑剂和药物的有价值的起始材料。

    Preparation of 1-alkenyl isocyanates
    3.
    发明授权
    Preparation of 1-alkenyl isocyanates 失效
    1-链烯基异氰酸酯的制备

    公开(公告)号:US4459236A

    公开(公告)日:1984-07-10

    申请号:US329126

    申请日:1981-12-09

    CPC分类号: C07C263/04 Y02P20/582

    摘要: 1-Alkenyl isocyanates are prepared by reacting aldehydes with carbamates to give N-(1-alkenyl)-carbamates and splitting these compounds at elevated temperatures. The 1,2-unsaturated isocyanates obtained are valuable starting materials for the preparation of pest control agents, dyes, drugs, textile water repellents, detergents, plastics, bleaches and adhesives, since they possess an activated double bond or an activated .alpha.-carbon atom, in addition to a reactive isocyanate group.

    摘要翻译: 通过使醛与氨基甲酸酯反应制备1-烯基异氰酸酯,得到N-(1-链烯基) - 氨基甲酸酯,并在升高的温度下分裂这些化合物。 获得的1,2-不饱和异氰酸酯是制备害虫控制剂,染料,药物,纺织品防水剂,洗涤剂,塑料,漂白剂和粘合剂的有价值的起始原料,因为它们具有活化的双键或活化的α-碳原子 ,除了活性异氰酸酯基团外。

    Preparation of caprolactam
    6.
    发明授权
    Preparation of caprolactam 失效
    己内酰胺的制备

    公开(公告)号:US4730040A

    公开(公告)日:1988-03-08

    申请号:US7788

    申请日:1987-01-28

    IPC分类号: C07D223/04 C07D201/08

    CPC分类号: C07D201/08

    摘要: .epsilon.-caprolactam is prepared by a process in which(a) a 5-formylvalerate is reacted with water in the presence of an acidic agent at from 30.degree. to 200.degree. C.,(b) the 5-formylvaleric acid thus obtained is reacted with excess ammonia and hydrogen in the presence of a hydrogenation catalyst and of a solvent which is inert under the reaction conditions, at from 50.degree. to 150.degree. C. under superatmospheric pressure, and(c) after the ammonia has been separated off, the resulting solution of 6-aminocaproic acid is heated to 150.degree.-370.degree. C. and the caprolactam formed is isolated.

    摘要翻译: ε-己内酰胺通过以下方法制备:(a)在30℃至200℃下,在酸性试剂存在下,使5-甲酰基戊酸酯与水反应,(b)将所得的5-甲酰基戊酸反应 在氢化催化剂和在反应条件下为惰性的溶剂中,在超大气压下,在50-150℃下,过量的氨和氢,和(c)氨分离后, 将得到的6-氨基己酸溶液加热至150-370℃,形成己内酰胺。