CN1156444A - 制备o-(2-羟烷基)肟的方法 - Google Patents
制备o-(2-羟烷基)肟的方法 Download PDFInfo
- Publication number
- CN1156444A CN1156444A CN95194813A CN95194813A CN1156444A CN 1156444 A CN1156444 A CN 1156444A CN 95194813 A CN95194813 A CN 95194813A CN 95194813 A CN95194813 A CN 95194813A CN 1156444 A CN1156444 A CN 1156444A
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- Prior art keywords
- oxime
- hydroxyalkyl
- alkyl
- oximes
- carbon atom
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C251/00—Compounds containing nitrogen atoms doubly-bound to a carbon skeleton
- C07C251/32—Oximes
- C07C251/50—Oximes having oxygen atoms of oxyimino groups bound to carbon atoms of substituted hydrocarbon radicals
- C07C251/54—Oximes having oxygen atoms of oxyimino groups bound to carbon atoms of substituted hydrocarbon radicals of hydrocarbon radicals substituted by singly-bound oxygen atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C249/00—Preparation of compounds containing nitrogen atoms doubly-bound to a carbon skeleton
- C07C249/04—Preparation of compounds containing nitrogen atoms doubly-bound to a carbon skeleton of oximes
- C07C249/12—Preparation of compounds containing nitrogen atoms doubly-bound to a carbon skeleton of oximes by reactions not involving the formation of oxyimino groups
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Medicinal Preparation (AREA)
- Epoxy Compounds (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
- Steroid Compounds (AREA)
Abstract
通过用氢催化氢化通式II的O-(2,3-环氧烷基)肟制备O-(2-羟烷基)肟I(R1和R2为烷基或R1和R2与它们带的碳原子共同构成5-7元环烷基)产物I适合用作除草剂的中间体。
Description
O-(2-羟烷基)肟作为作物保护剂的中间体有重大的意义(例如参考较早的德国专利申请书DE-A4415887)。
在用羟胺的O-烷基化法制备式I化合物中,还总是生成一定数量的在与肟的氧相邻的碳原子上带有CH3基的式I化合物的异构体。
以前描述的环氧乙烷的氢化或者得到伯醇,或者得到仲醇和伯醇的混合物(例如参见US4064186和Houben-Weyl,“有机化学方法”,乔治蒂默出版社,斯图加特,第6/3卷,第4版,1965,第442-446页)。
本发明的一个目的是提供一种有更高区域选择性和基本上不生成O-(2-羟烷基)肟I的副产物的方法。
我们已发现,这一目的可用这一样一种制备式IO-(2-羟烷基)肟的方法来达到,该法包括,用氢使通式II的O-(2,3-环氧烷基)肟催化氢化下面,Houben-Weyl参考文献涉及:Houben-Weyl,“有机化学方法”,第4版,蒂默出版社,斯图加特。
在可用本发明的方法制备的化合物I中,优选其中R1和R2都为C1-C4烷基、特别是C1-C3烷基、或者与它们所带的碳原子一起形成环戊基环或环己基环的那些化合物。特别优选的是,R1和R2都为甲基或乙基,特别是都为甲基。
O-(2,3-环氧烷基)肟II通常是已知的或者可用已知的方法制备,特别是通过相应的表卤醇与游离肟在偶极非质子传递溶剂中的碱催化反应来制备(例如参考“有机化学杂志”,5(1969),第1353-1355页)。
适用的氢化催化剂是通常用于这一目的的催化剂,例如在Houben-Weyl,第4/1C卷中描述的。
优选的氢化催化剂是那些含有周期表IUPAC分类第8-10族金属的催化剂,优选元素钴、钌和铑,特别优选元素铂和镍,特别是钯。
催化剂可以本身的形式使用,或者优选负载在载体上。常用的载体材料如氧化硅、氧化铝、二氧化钛,硅酸盐和沸石,特别是活性炭是适用的。
为了制备负载催化剂,还可使用粘合剂或成型助剂。催化剂可以碎片、挤条、片剂或小球形式使用。
通常,对每摩尔要氢化的化合物II来说,使用0.1-2、优选0.1-1%(重量)催化剂,这一数量是指不合载体材料的活性物质。
氢化可连续进行,或优选间歇进行。
在液相间歇法中,氢化可在溶剂存在下进行。适合的溶剂是极性溶剂,如醚类和醇类,以及它们的混合物。优选的溶剂是至多有6个碳原子的醚或醇,如1,2-二甲氧基乙烷、乙醇、正丙醇、异丙醇和正丁醇。
压力可在很宽的范围内选择,从1至400巴,但反应优选在1-100巴范围内进行,更优选10-70巴,最优选30-50巴。
在氢化过程中,温度优选为0-100℃,更优选10-50℃,最优选25-30℃。
反应产物I用已知的方法分离,优选用蒸馏法分离。化合物I的产率通常为70-90%,选择性通常大于98%。
用本发明的方法制得的O-(2-羟烷基)肟I适用作除草剂的前体,特别是环己酮型除草剂(例如参考DE-A4415887)。
实施例
2-丙酮O-(2-羟丙基)肟的制备
用4克pd/C(10%(重量)Pd)处理130克(0.94摩尔)2-丙酮O-(2-环氧丙基)肟(参考EP-A23560;有机化学杂志,5(1969),第1353-1355页)和600毫升乙醇,混合物在25℃、50巴氢压下氢化。17小时后反应完全。过滤出催化剂。然后除去溶剂,残留液通过长50厘米、直径5厘米的填料塔蒸馏,填料塔装有直径3毫米的金属丝网环(初馏点:74℃/20毫巴)。
2-丙酮O(2-羟丙基)肟的产率为84%,纯度为99.8%。在这种情况下,不生成异构体2-丙酮O-(2-羟基-1-甲基-乙基)肟。
Claims (4)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4427290A DE4427290A1 (de) | 1994-08-02 | 1994-08-02 | Verfahren zur Herstellung von O-(2-Hydroxyalkyl)-oximen |
DEP4427290.1 | 1994-08-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1156444A true CN1156444A (zh) | 1997-08-06 |
CN1046705C CN1046705C (zh) | 1999-11-24 |
Family
ID=6524700
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN95194813A Expired - Lifetime CN1046705C (zh) | 1994-08-02 | 1995-07-25 | 制备o-(2-羟烷基)肟的方法 |
Country Status (17)
Country | Link |
---|---|
US (1) | US5739400A (zh) |
EP (1) | EP0775106B1 (zh) |
JP (1) | JPH10506380A (zh) |
KR (1) | KR100388881B1 (zh) |
CN (1) | CN1046705C (zh) |
AT (1) | ATE175956T1 (zh) |
AU (1) | AU3165495A (zh) |
BR (1) | BR9508494A (zh) |
CA (1) | CA2196451C (zh) |
DE (2) | DE4427290A1 (zh) |
ES (1) | ES2126920T3 (zh) |
HU (1) | HU215284B (zh) |
IL (1) | IL114798A (zh) |
MX (1) | MX9700808A (zh) |
MY (1) | MY114890A (zh) |
WO (1) | WO1996004237A1 (zh) |
ZA (1) | ZA956401B (zh) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3040097A (en) * | 1959-04-06 | 1962-06-19 | Purdue Research Foundation | Beta-hydroxy alkyl ethers of oximes and production thereof |
US4064186A (en) * | 1975-09-23 | 1977-12-20 | Union Carbide Corporation | Hydrogenation of styrene oxide to produce 2-phenylethanol |
DE2927117A1 (de) * | 1979-07-05 | 1981-01-08 | Basf Ag | Verfahren zur herstellung von o-substituierten ketoximen |
DE4415887A1 (de) * | 1994-05-05 | 1995-06-01 | Basf Ag | Verfahren zur Herstellung von O-Phenoxyalkyloximen und O-Phenoxyalkylhydroxylaminen |
-
1994
- 1994-08-02 DE DE4427290A patent/DE4427290A1/de not_active Withdrawn
-
1995
- 1995-07-25 DE DE59504921T patent/DE59504921D1/de not_active Expired - Lifetime
- 1995-07-25 AT AT95927718T patent/ATE175956T1/de active
- 1995-07-25 US US08/776,579 patent/US5739400A/en not_active Expired - Lifetime
- 1995-07-25 MX MX9700808A patent/MX9700808A/es unknown
- 1995-07-25 ES ES95927718T patent/ES2126920T3/es not_active Expired - Lifetime
- 1995-07-25 KR KR1019970700689A patent/KR100388881B1/ko not_active IP Right Cessation
- 1995-07-25 EP EP95927718A patent/EP0775106B1/de not_active Expired - Lifetime
- 1995-07-25 JP JP8506156A patent/JPH10506380A/ja active Pending
- 1995-07-25 CN CN95194813A patent/CN1046705C/zh not_active Expired - Lifetime
- 1995-07-25 WO PCT/EP1995/002932 patent/WO1996004237A1/de active IP Right Grant
- 1995-07-25 BR BR9508494A patent/BR9508494A/pt not_active IP Right Cessation
- 1995-07-25 HU HU9700310A patent/HU215284B/hu not_active IP Right Cessation
- 1995-07-25 AU AU31654/95A patent/AU3165495A/en not_active Abandoned
- 1995-07-25 CA CA002196451A patent/CA2196451C/en not_active Expired - Fee Related
- 1995-08-01 IL IL11479895A patent/IL114798A/xx not_active IP Right Cessation
- 1995-08-01 ZA ZA9506401A patent/ZA956401B/xx unknown
- 1995-08-02 MY MYPI95002244A patent/MY114890A/en unknown
Also Published As
Publication number | Publication date |
---|---|
US5739400A (en) | 1998-04-14 |
BR9508494A (pt) | 1999-06-01 |
JPH10506380A (ja) | 1998-06-23 |
MY114890A (en) | 2003-02-28 |
MX9700808A (es) | 1997-05-31 |
EP0775106A1 (de) | 1997-05-28 |
DE59504921D1 (de) | 1999-03-04 |
CN1046705C (zh) | 1999-11-24 |
DE4427290A1 (de) | 1996-02-08 |
WO1996004237A1 (de) | 1996-02-15 |
HUT77513A (hu) | 1998-05-28 |
IL114798A0 (en) | 1995-12-08 |
CA2196451A1 (en) | 1996-02-15 |
KR100388881B1 (ko) | 2004-07-16 |
EP0775106B1 (de) | 1999-01-20 |
ZA956401B (en) | 1997-02-03 |
HU215284B (hu) | 1998-11-30 |
ES2126920T3 (es) | 1999-04-01 |
CA2196451C (en) | 2005-09-06 |
AU3165495A (en) | 1996-03-04 |
IL114798A (en) | 1999-10-28 |
ATE175956T1 (de) | 1999-02-15 |
KR970704670A (ko) | 1997-09-06 |
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