Preparation of 2,6-dimethylmorpholine from
N-(2-hydroxypropyl)-2,6-dimethylmorpholine
    1.
    发明授权
    Preparation of 2,6-dimethylmorpholine from N-(2-hydroxypropyl)-2,6-dimethylmorpholine 失效
    由N-(2-羟丙基)-2,6-二甲基吗啉制备2,6-二甲基吗啉

    公开(公告)号:US5436335A

    公开(公告)日:1995-07-25

    申请号:US307245

    申请日:1994-09-16

    CPC分类号: C07D295/023

    摘要: A process for the preparation of 2,6-dimethylmorpholine from N-(2-hydroxypropyl)-2,6-dimethylmorpholine, in which N-(2-hydroxypropyl)-2,6-dimethylmorpholine, in whicha) N-(2-hydroxypropyl)-2,6-dimethylmorpholine is caused to react in the presence of a catalyst containing an element listed in Groups Ib, IIb, and/or VIIIb of the Periodic Table at temperatures ranging from 150.degree. to 600.degree. C. and is then caused to react with water at temperatures ranging from 30.degree. to 300.degree. C. orb) N-(2-hydroxypropyl)-2,6-dimethylmorpholine is caused to react in the presence of an acid catalyst at temperatures ranging from 100.degree. to 400.degree. C. followed by acid hydrolysis with water at temperatures ranging from 30.degree. to 300.degree. C.

    摘要翻译: 一种由N-(2-羟丙基)-2,6-二甲基吗啉制备2,6-二甲基吗啉的方法,其中N-(2-羟丙基)-2,6-二甲基吗啉,其中a)N-(2 - 羟丙基)-2,6-二甲基吗啉在含有元素周期表第Ib,IIb和/或VIIIb族元素的催化剂存在下反应,温度范围为150〜600℃, 然后在30℃至300℃的温度下与水反应,或b)使N-(2-羟丙基)-2,6-二甲基吗啉在酸催化剂存在下,在100℃ 至400℃,然后在30℃至300℃的温度下用水进行酸水解。

    Preparation of pyrazole and its derivatives
    3.
    发明授权
    Preparation of pyrazole and its derivatives 失效
    吡唑及其衍生物的制备

    公开(公告)号:US4996327A

    公开(公告)日:1991-02-26

    申请号:US534270

    申请日:1990-06-07

    IPC分类号: C07D231/06 C07D231/12

    CPC分类号: C07D231/12

    摘要: Pyrazole and its derivatives are prepared by dehydrogenating 2-pyrazoline or its derivatives by a process in which the reaction is carried out using sulfuric acid in the presence of iodine or of an iodine compound at from 50.degree. to 250.degree. C.

    摘要翻译: 吡唑及其衍生物通过使用硫酸在碘存在下使用硫酸或在50〜250℃的碘化合物进行反应的方法使2-吡唑啉或其衍生物脱氢来制备。

    Preparation of pyrazole and its derivatives
    4.
    发明授权
    Preparation of pyrazole and its derivatives 失效
    吡唑及其衍生物的制备

    公开(公告)号:US5569769A

    公开(公告)日:1996-10-29

    申请号:US596376

    申请日:1996-02-15

    摘要: A process for preparing pyrazole and its derivatives of the formula I ##STR1## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each hydrogen, halogen, nitro, carboxyl, sulfonyl or C-organic radicals, from alpha,beta-unsaturated carbonyl compounds of the formula II ##STR2## and hydrazine or hydrazine derivatives of the formula IIIH.sub.2 N--NHR.sup.4 IIIwherein, initially without additional diluent, an alpha,beta-unsaturated carbonyl compound of the formula II is reacted with hydrazine or a hydrazine derivative of the formula III, and the resulting reaction mixture is reacted in another step with a mixture of sulfuric acid and iodine or a compound which liberates iodine or hydrogen iodide.

    摘要翻译: PCT No.PCT / EP94 / 02708 Sec。 371日期:1996年2月15日 102(e)日期1996年2月15日PCT 1994年8月13日PCT PCT。 出版物WO95 / 06036 日期1995年3月2日制备式I的吡唑及其衍生物的方法,其中R 1,R 2,R 3和R 4各自为氢,卤素,硝基,羧基,磺酰基或C - 有机基团, 式II的不饱和羰基化合物和式III的肼或肼衍生物H2N-NHR4 III其中,最初没有另外的稀释剂,式II的α,β-不饱和羰基化合物与肼或 式III的肼衍生物,并且所得反应混合物在另一步骤中与硫酸和碘的混合物或释放碘或碘化氢的化合物反应。

    Preparation of N-substituted pyrazoles
    5.
    发明授权
    Preparation of N-substituted pyrazoles 失效
    N-取代吡唑的制备

    公开(公告)号:US5468871A

    公开(公告)日:1995-11-21

    申请号:US334613

    申请日:1994-11-07

    摘要: N-substituted-pyrazoles of the formula ##STR1## wherein R.sup.1 is C.sub.1 -C.sub.12 -alkyl or C.sub.7 -C.sub.20 -alkyl, and R.sup.2, R.sup.3 and R.sup.4 independently denote hydrogen, C.sub.1 -C.sub.12 -alkyl, phenyl, C.sub.7 -C.sub.20 -alkylphenyl and C.sub.7 -C.sub.20 -phenylalkyl, are prepared by reacting a pyrazole of the formula ##STR2## wherein R.sup.2, R.sup.3 and R.sup.4 have the meanings above, with an alcohol or ether of the formulaR.sup.1 --O--R.sup.5 III,wherein R.sup.5 is hydrogen or R.sup.1, at a temperature of from 200.degree. to 550.degree. C. and a pressure of from 0.001 to 50 bar in the presence of a heterogeneous catalyst, preferably one which contains acid centers such as the oxides of aluminum, silicon, titanium and/or zirconium, optionally doped with phosphoric acid.

    摘要翻译: 其中R 1是C 1 -C 12 - 烷基或C 7 -C 20 - 烷基,R 2,R 3和R 4独立地表示氢,C 1 -C 12 - 烷基,苯基,C 7 -C 20 - 烷基苯基 和C 7 -C 20 - 苯基烷基,其通式如下:其中R2,R3和R4具有上述含义的吡唑与式R1-O-R5III的醇或醚反应制备,其中R 5是氢或 R1在200〜550℃的温度和0.001〜50巴的压力下,在非均相催化剂存在下,优选含有酸中心的铝,硅,钛和/或氧化物的氧化物 锆,任选掺杂有磷酸。

    Preparation of 3-methylpyrazole
    6.
    发明授权
    Preparation of 3-methylpyrazole 失效
    3-甲基吡唑的制备

    公开(公告)号:US5128480A

    公开(公告)日:1992-07-07

    申请号:US745177

    申请日:1991-08-15

    摘要: 3-Methylpyrazole and its derivatives are prepared by reacting butenediols or ethynylalkylcarbinols or their acylates in 30-100% by weight sulfuric acid with unsubstituted or substituted hydrazine or its salts in the presence of catalytic amounts of iodine or an iodine compound.

    摘要翻译: 通过在催化量的碘或碘化合物的存在下,将丁烯二醇或乙炔基烷基甲醇或其酰化物在30-100重量%硫酸中与未取代或取代的肼或其盐反应来制备。