Preparation of 2-alkyl- and 2-aryl-thiomethylphenols
    51.
    发明授权
    Preparation of 2-alkyl- and 2-aryl-thiomethylphenols 失效
    2-烷基 - 和2-芳基 - 硫代甲基苯酚的制备

    公开(公告)号:US4304940A

    公开(公告)日:1981-12-08

    申请号:US181593

    申请日:1980-08-27

    CPC分类号: C07C323/00

    摘要: In the preparation of a 1-alkyl- and 2-aryl-thio-methylphenol of the formula ##STR1## in which R.sup.1 is, or the radicals R.sup.1 are, in the 3-, 5- and/or 6-positions relative to the hydroxyl group and each independently is a hydrogen or halogen atom, or an alkyl, cycloalkyl, aryl, aralkyl or alkoxy group,n is 1, 2, or 3, andR.sup.2 is an optionally substituted alkyl group having 1 to 12 carbon atoms, an optionally substituted cycloalkyl group having 3 to 6 carbon atoms, an optionally substituted phenyl radical or an optionally substituted aralkyl radical,by reacting a phenol of the formula ##STR2## with formaldehyde or an formaldehyde producing compound and with a mercaptan or a thiophenol of the formulaR.sup.2 --S--H.the improvement which comprises effecting the reaction at a temperature of about 90.degree. to 220.degree. C. in the presence of at least one compound of lithium, magnesium, calcium, strontium, barium, zinc, cadmium, lead, manganese, cobalt, nickel, cooper, iron, chromium and aluminum as a catalyst. The products are obtained in high yield and selectivity.

    摘要翻译: 在制备其中R 1为或基团R 1为在相对于C 1 -C 6烷基的3-,5-和/或6-位的式“IMAGE”的1-烷基 - 和2-芳基 - 硫代 - 甲基苯酚 羟基,并且各自独立地为氢或卤素原子,或烷基,环烷基,芳基,芳烷基或烷氧基,n为1,2或3,并且R 2为任选取代的具有1至12个碳原子的烷基, 任选取代的具有3至6个碳原子的环烷基,任选取代的苯基或任选取代的芳烷基,通过使式IMA的苯酚与甲醛或产生甲醛的化合物和式(I)的硫醇或苯硫酚反应, R2-SH。 包括在至少一种锂,镁,钙,锶,钡,锌,镉,铅,锰,钴,镍等的化合物的存在下在约90℃至220℃的温度下进行反应的改进。 铜,铬和铝作为催化剂。 以高产率和选择性获得产品。

    Process for the continuous preparation of di-tertiary butylcresols
    53.
    发明授权
    Process for the continuous preparation of di-tertiary butylcresols 失效
    连续制备二叔丁基甲酚的方法

    公开(公告)号:US4144400A

    公开(公告)日:1979-03-13

    申请号:US748073

    申请日:1976-12-06

    CPC分类号: C07C37/14

    摘要: A process for the continuous preparation of a ditertiary butylcresol wherein m- or p-cresol is reacted with isobutene at elevated temperature using H.sub.2 SO.sub.4 as catalyst wherein the process is carried out stepwise by introducing stepwise into a reaction mixture comprising substantially all of the cresol to be reacted with isobutene. The total amount of isobutene introduced is introduced such that less isobutene is charged in a last stage of the process than in the first stage thereof. Thereafter the catalyst is deactivated.

    摘要翻译: 连续制备二叔丁基甲酚的方法,其中使用H 2 SO 4作为催化剂,在高温下使异丙烯与异丁烯反应,其中该步骤通过逐步引入含有基本上所有甲酚的反应混合物来逐步进行 与异丁烯反应。 导入的异丁烯的总量被引入,使得在该方法的最后阶段比在第一阶段中加入较少的异丁烯。 此后催化剂失活。

    Process for preparing 4,6-diamino-resorcinol dihydrochloride
    54.
    发明授权
    Process for preparing 4,6-diamino-resorcinol dihydrochloride 失效
    制备4,6-二氨基间苯二酚二盐酸盐的方法

    公开(公告)号:US6093852A

    公开(公告)日:2000-07-25

    申请号:US180972

    申请日:1998-11-17

    CPC分类号: C07C213/02

    摘要: The invention concerns 4,6-diamino-resorcinol which is prepared in the form of its dihydrochloride by catalytic hydrogenation of 1,3-benzyloxy-4,6-dinitrobenzene on a noble metal contact in a two-phase mixture of dilute aqueous hydrochloric acid and an organic solvent which is not miscible with dilute aqueous hydrochloric acid. This process is carried out at a pressure of between 1 and 200 bar and a temperature of between 0 and 200.degree. C.

    摘要翻译: PCT No.PCT / EP97 / 02409 Sec。 371日期:1998年11月17日 102(e)1998年11月17日PCT PCT 1997年5月12日PCT公布。 出版物WO97 / 44311 日期1997年11月27日本发明涉及通过在二相混合物中贵金属接触上的1,3-苄氧基-4,6-二硝基苯的催化氢化制备其二盐酸盐形式的4,6-二氨基间苯二酚 的稀盐酸水溶液和与稀盐酸水溶液不混溶的有机溶剂。 该方法在1至200巴之间的压力和0至200℃的温度下进行。

    Process for preparing di-C.sub.1 - C.sub.4 -alkyl 5-nitro-isophthalates
    55.
    发明授权
    Process for preparing di-C.sub.1 - C.sub.4 -alkyl 5-nitro-isophthalates 失效
    制备5-硝基 - 间苯二甲酸二-C1-4-烷基酯的方法

    公开(公告)号:US6002041A

    公开(公告)日:1999-12-14

    申请号:US73485

    申请日:1998-05-06

    IPC分类号: C07C205/57 C07C205/00

    CPC分类号: C07C201/12

    摘要: Particularly pure di-C.sub.1 -C.sub.4 -alkyl 5-nitro-isophthalates are obtained in good yield and in a simple process by dissolving 5-nitro-isophthalic acid in a mixture of a C.sub.1 -C.sub.4 -alkyl alcohol and a solvent which is miscible or only partially miscible with water, heating in the presence of a strong acid, thus forming a second, aqueous phase, crystallizing out, after the esterification reaction has ended, the di-C.sub.1 -C.sub.4 -alkyl 5-nitro-isophthalate formed from the organic phase by cooling and removing the aqueous phase before or after the di-C.sub.1 -C.sub.4 -alkyl 5-nitro-isophthalate is separated off.

    摘要翻译: 通过将5-硝基间苯二甲酸溶解在C1-C4烷基醇和可混溶的溶剂的混合物中,以良好的产率和简单的方法得到特别纯的5-硝基 - 间苯二甲酸二 - 仅在水中部分混溶,在强酸存在下加热,从而形成第二个水相,在酯化反应结束后结晶出由有机物形成的5-硝基间苯二甲酸二C1-C4烷基酯 在分离出5-硝基间苯二甲酸二-C 1 -C 4烷基酯之前或之后,通过冷却和除去水相来进行相。

    Process for the preparation of hydroxypivalic acid
    57.
    发明授权
    Process for the preparation of hydroxypivalic acid 失效
    制备羟基新戊酸的方法

    公开(公告)号:US5801276A

    公开(公告)日:1998-09-01

    申请号:US910442

    申请日:1997-08-05

    CPC分类号: C07C51/285

    摘要: Hydroxypivalic acid can be prepared by oxidation of hydroxypivalaldehyde with hydrogen peroxide by metering the hydrogen peroxide, as the oxidizing agent, into an aqueous hydroxypivalaldehyde reservoir in the temperature range from 60.degree. to 80.degree. C. such that a hydrogen peroxide concentration of 4% by weight, based on the total weight of the reaction mixture, is not exceeded, and ending the addition of hydrogen peroxide as soon as the concentration of hydroxypivalaldehyde in the reaction mixture falls below 1% by weight.

    摘要翻译: 羟基新戊酸可以通过用过氧化氢氧化羟基新戊醛来制备,通过将过氧化氢作为氧化剂计量到在60℃至80℃的温度范围内的羟基新戊醛水溶液储存器中,使得过氧化氢浓度为4% 不超过反应混合物的总重量,并且一旦反应混合物中羟基新戊醛的浓度降至低于1重量%,则结束加入过氧化氢。

    Process for the preparation of 5-hydroxymethylthiazole
    58.
    发明授权
    Process for the preparation of 5-hydroxymethylthiazole 失效
    5-羟甲基噻唑的制备方法

    公开(公告)号:US5780638A

    公开(公告)日:1998-07-14

    申请号:US762625

    申请日:1996-12-09

    IPC分类号: C07D277/24

    CPC分类号: C07D277/24

    摘要: 5-Hydroxymethylthiazole is prepared in an improved manner by reducing 5-formylthiazole using a borane compound. Particularly advantageous in this case is the use of 5-formylthiazole which has been obtained by reaction of a 2-halomalonaldehyde compound with thioformamide in the presence of less than 5% by weight of water (based on the reaction mixture).

    摘要翻译: 使用硼烷化合物还原5-甲酰基噻唑,以改进的方式制备5-羟基甲基噻唑。 在这种情况下特别有利的是使用5-甲酰基噻唑,其通过2-卤代甲醛化合物与硫代甲酰胺在小于5重量%的水(基于反应混合物)的存在下反应获得。

    Process for the preparation of alkylhydrazine salts
    60.
    发明授权
    Process for the preparation of alkylhydrazine salts 失效
    烷基肼盐的制备方法

    公开(公告)号:US5585521A

    公开(公告)日:1996-12-17

    申请号:US532909

    申请日:1995-09-22

    CPC分类号: C07C241/02

    摘要: Alkylhydrazine salts are prepared on an industrial scale and with good results by reacting together hydrazine, an alkene and a strong protonic acid in the presence of water, hydrazine and the protonic acid being introduced, the alkene being added, the liquid and gaseous phases present in the reaction vessel being intensively mixed together at 75.degree. to 150.degree. C., then the reaction mixture being cooled to temperatures below 60.degree. C., the precipitated alkylhydrazine salt being separated off, hydrazine and strong protonic acid being again added to the mother liquor, then alkene being added again and the next reaction cycle being thus carried out.

    摘要翻译: 在工业规模上制备烷基肼盐,并且在水,肼和引入的质子酸,加入的烯烃,存在的液体和气相中,肼,烯烃和强质子酸之间使肼, 将反应容器在75〜150℃剧烈混合,然后将反应混合物冷却至低于60℃的温度,分离出沉淀的烷基肼盐,再将肼和强质子酸加入到母液中 然后再次加入烯烃,从而进行下一个反应循环。