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公开(公告)号:US4317925A
公开(公告)日:1982-03-02
申请号:US060559
申请日:1979-07-25
IPC分类号: C07C53/128 , C07C45/51 , C07C45/62 , C07C47/02 , C07C51/00 , C07C51/235 , C07C67/00
CPC分类号: C07C45/62 , C07C45/513 , C07C47/02 , C07C51/235
摘要: A process for the preparation of di-n-propylacetic acid which comprises the steps ofA. converting n-valeraldehyde-diallyl acetal into allyl-1-pentenyl ether by cleaving one mol of allyl alcohol per one mol of n-valeraldehye-diallyl acetal;B. rearranging the allyl-1-pentenyl ether thermally into 2-propyl-pent-4-en-1-al,C. partially hydrogenating the 2-propyl-pent-en-1-al catalytically to form 2-propyl valeraldehyde, andD. oxidizing the 2-propyl valeraldehyde to form dipropyl-acetic acid.
摘要翻译: 一种制备二正丙基乙酸的方法,其包括以下步骤:通过每1摩尔正缬氨酸二烯丙基缩醛裂解一摩尔烯丙醇,将正戊醛 - 二烯丙基缩醛转化为烯丙基-1-戊烯基醚 ; B.将烯丙基-1-戊烯基醚热重排为2-丙基 - 戊-4-烯-1-醇,C.催化部分氢化2-丙基戊-1-烯,形成2-丙基戊醛, 和D.氧化2-丙基戊醛形成二丙基 - 乙酸。
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公开(公告)号:US4515986A
公开(公告)日:1985-05-07
申请号:US294114
申请日:1981-08-19
申请人: Wolfgang Bernhagen , Volker Falk , Helmut Springer , Jurgen Weber , Ernst Wiebus , Claus Kniep
发明人: Wolfgang Bernhagen , Volker Falk , Helmut Springer , Jurgen Weber , Ernst Wiebus , Claus Kniep
IPC分类号: C07C223/02 , C07C85/00 , C07C85/18
CPC分类号: C07C221/00
摘要: An improved process for preparing 3-dimethylamino-2,2-dimethylpropanal from isobutyraldehyde, dimethylamine and a source of formaldehyde is disclosed wherein the process is carried out at a pH value of 9 to 11.
摘要翻译: 公开了一种由异丁醛,二甲胺和甲醛源制备3-二甲基氨基-2,2-二甲基丙醛的改进方法,其中该方法在pH值为9至11的条件下进行。
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公开(公告)号:US4275242A
公开(公告)日:1981-06-23
申请号:US106314
申请日:1979-12-21
IPC分类号: B01J31/00 , C07B61/00 , C07C45/00 , C07C45/75 , C07C47/20 , C07C47/21 , C07C67/00 , C07C47/228
摘要: A process for preparing 2-methylenealdehydes by reacting aldehydes with formaldehyde in the presence of enamines is disclosed.
摘要翻译: 公开了一种在烯胺存在下使醛与甲醛反应制备2-甲基醛的方法。
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公开(公告)号:US4270008A
公开(公告)日:1981-05-26
申请号:US83893
申请日:1979-10-11
IPC分类号: A61K8/33 , A61Q13/00 , C07C41/28 , C07C43/15 , C07C45/00 , C07C45/51 , C07C47/21 , C07C67/00 , C11B9/00
CPC分类号: C11B9/0015 , C07C41/28 , C07C45/513 , C07C45/515 , C07C47/21 , Y02P20/582
摘要: 2-Propyl-pent-4-en-1-al of the formula ##STR1## and a process for its preparation.
摘要翻译: 2-丙基 - 戊-4-烯-1-al及其制备方法。
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公开(公告)号:US4404410A
公开(公告)日:1983-09-13
申请号:US272229
申请日:1981-06-10
申请人: Boy Cornils , Jurgen Weber , Wolfgang Bernhagen , Helmut Springer
发明人: Boy Cornils , Jurgen Weber , Wolfgang Bernhagen , Helmut Springer
CPC分类号: C07C29/03 , A24F2700/03
摘要: An improved process for the preparation of 2,3-dimethyl-2,3-butanediol is disclosed wherein hydrogen peroxide and 2,3-dimethylbutene are reacted with formic acid at 50.degree. to 70.degree. C. while stirring, the 2,3-dimethylbutene and hydrogen peroxide being introduced into the formic acid simultaneously but separately. The diol can be obtained by hydrolysis of the pinacol monoformate formed.
摘要翻译: 公开了一种制备2,3-二甲基-2,3-丁二醇的改进方法,其中过氧化氢和2,3-二甲基丁烯在50℃至70℃下与甲酸反应同时搅拌, 二甲基丁烯和过氧化氢同时引入甲酸,但分开。 二醇可以通过水解形成的频哪醇单甲酸酯来获得。
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公开(公告)号:US4317945A
公开(公告)日:1982-03-02
申请号:US178396
申请日:1980-08-15
IPC分类号: B01J23/00 , C07B61/00 , C07C27/00 , C07C29/38 , C07C31/20 , C07C45/50 , C07C45/62 , C07C45/75 , C07C47/02 , C07C67/00 , C07C29/14
摘要: A process for the preparation of 2-methyl-2-sec.butyl-1,3-propanediol comprising hydroformylating 2-methyl-1-butene with carbon monoxide and hydrogen in the presence of a first catalyst to form the substance 3-methyl-pentanal, condensing said substance with formaldehyde, or a compound which forms formaldehyde under the conditions of condensation in a basic medium to form alpha-sec.butyl-acrolein, partially hydrogenating said acrolein in the presence of a second catalyst to form the material 2,3-dimethyl pentanal, and converting said material into said diol by treatment with formaldehyde, or a compound which forms formaldehyde under the conditions of conversion, in the presence of a strong base as a third catalyst.The compound of the present invention is useful as an intermediate in the production of pharmaceuticals and drugs; in particular, the production of carbamates which are useful as tranquilizers and blood pressure lowering agents.
摘要翻译: 一种制备2-甲基-2-仲丁基-1,3-丙二醇的方法,包括在第一催化剂存在下,将2-甲基-1-丁烯与一氧化碳和氢气进行甲酰化,形成3-甲基-2- 戊醛,用甲醛缩合所述物质,或在碱性介质中在冷凝条件下形成甲醛以形成α-仲丁基丙烯醛的化合物,在第二催化剂存在下部分氢化所述丙烯醛以形成材料2, 并通过用甲醛处理或在转化条件下形成甲醛的化合物在作为第三催化剂的强碱存在下将所述物质转化成所述二醇。 本发明化合物可用作药物和药物生产中的中间体; 特别是生产可用作镇定剂和降血压剂的氨基甲酸酯。
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公开(公告)号:US4307252A
公开(公告)日:1981-12-22
申请号:US173792
申请日:1980-07-30
IPC分类号: A61K8/33 , A61Q13/00 , C07C41/28 , C07C43/15 , C07C45/00 , C07C45/51 , C07C47/21 , C07C67/00 , C11B9/00
CPC分类号: C11B9/0015 , C07C41/28 , C07C45/513 , C07C45/515 , C07C47/21 , Y02P20/582
摘要: 2-Propyl-pent-4-en-1-al of the formula ##STR1## and a process for its preparation.
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公开(公告)号:US4288643A
公开(公告)日:1981-09-08
申请号:US146830
申请日:1980-05-05
IPC分类号: C07C1/00 , C07C1/24 , C07C5/25 , C07C11/107 , C07C27/00 , C07C29/14 , C07C29/141 , C07C29/17 , C07C31/125 , C07C45/00 , C07C45/68 , C07C45/75 , C07C67/00 , C07C1/253
CPC分类号: C07C5/2531 , C07C1/24 , C07C11/107 , C07C29/175 , C07C45/75 , C07C2521/04 , C07C2527/054
摘要: A process for the preparation of 2,3-dimethylbutene-2 is disclosed, which comprises the steps of converting isovaleraldehyde to isopropylacrolein, hydrogenating .alpha.-isopropylacrolein to form 2,3-dimethylbutanol, dehydrating 2,3-dimethylbutanol to form an olefin mixture comprising 2,3-dimethylbutene-1 and 2,3-dimethylbutene-2, and isomerizing the 2,3-dimethylbutene-1 contained in the mixture into 2,3-dimethylbutene-2. The present process is technically simple and inexpensive to utilize, and results in high yields of the desired product.
摘要翻译: 公开了制备2,3-二甲基丁烯-2的方法,其包括将异戊醛转化为异丙基丙烯醛,氢化α-异丙基丙烯醛形成2,3-二甲基丁醇,脱水2,3-二甲基丁醇以形成烯烃混合物的步骤,该烯烃混合物包含 2,3-二甲基丁烯-1和2,3-二甲基丁烯-2,并将混合物中所含的2,3-二甲基丁烯-1异构化为2,3-二甲基丁烯-2。 本发明的方法在技术上是简单且便宜的,并且导致所需产物的高产率。
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公开(公告)号:US4283564A
公开(公告)日:1981-08-11
申请号:US106211
申请日:1979-12-21
申请人: Wolfgang Bernhagen , Hanswilhelm Bach , Eike Brundin , Wilhelm Gick , Helmut Springer , Adolf Hack
发明人: Wolfgang Bernhagen , Hanswilhelm Bach , Eike Brundin , Wilhelm Gick , Helmut Springer , Adolf Hack
CPC分类号: C07C45/75
摘要: A process for preparing methacrolein by catalytic reaction of propionaldehyde with formaldehyde is disclosed wherein the catalyst comprises a mixture of secondary amine and organic carboxylic acid with up to 8 carbon atoms.
摘要翻译: 公开了通过丙醛与甲醛的催化反应制备甲基丙烯醛的方法,其中催化剂包含仲胺和具有至多8个碳原子的有机羧酸的混合物。
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