JP4373080B2 - Purification of milbemycins - Google Patents
Purification of milbemycins Download PDFInfo
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- JP4373080B2 JP4373080B2 JP2002371866A JP2002371866A JP4373080B2 JP 4373080 B2 JP4373080 B2 JP 4373080B2 JP 2002371866 A JP2002371866 A JP 2002371866A JP 2002371866 A JP2002371866 A JP 2002371866A JP 4373080 B2 JP4373080 B2 JP 4373080B2
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- milbemycin
- milbemycins
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D493/00—Heterocyclic compounds containing oxygen atoms as the only ring hetero atoms in the condensed system
- C07D493/22—Heterocyclic compounds containing oxygen atoms as the only ring hetero atoms in the condensed system in which the condensed system contains four or more hetero rings
Description
【０００１】
【発明の属する技術分野】
本発明は、ミルベマイシン類の工業的スケールでの精製法に関する。
【０００２】
【従来の技術】
微生物代謝産物から得られる１６員環マクロライド化合物であるミルベマイシン類は、殺虫、殺ダニ活性又は駆虫活性を有することが知られており、例えば下記表１に示される化合物を挙げることが出来る。
【０００３】
【表１】
これらの化合物を製造する際、通常すべての微生物代謝産物と同様に、類縁体及び不純物が多く含まれる。従って、工業的にこれらの化合物を製造する場合、工業的製造法として使える方法で精製を行う必要がある。
【０００５】
一般的な上記化合物の精製法としては、発酵培養物から有機溶媒にて上記化合物を抽出した後、シリカゲル、アルミナ、デキストランゲル、イオン交換樹脂、合成吸着剤、分子ふるい、C8H17,C18H37,C6H5などの化学結合型シリカゲルなどの担体を用いたクロマトグラフィーに付し、得られた目的の化合物を含む画分を濃縮乾固する方法が知られている（例えば、特許文献１、特許文献２、特許文献３又は特許文献４参照。）。しかしながら、これらのクロマトグラフィーを用いる方法では、担体の負荷量が低いため、大量のクロマト担体及び有機溶媒等の溶出溶媒を用いねばならず、生産性も低く、得られた精製品は高価なものとなり、工業的には必ずしも満足できる精製法ではない。
【０００６】
【特許文献１】
特開昭５０−２９７４２号公報
【特許文献２】
特開昭５５−１３１３９８号公報
【特許文献３】
特開昭５６−３２４８１号公報
【特許文献４】
特開平１−１９３２７０号公報
【０００７】
【発明が解決しようとする課題】
本発明の目的は、工業的に煩雑な精製法、例えばクロマトグラフィーを用いずに、簡便に不要物を除去することができるミルベマイシン類の精製法を提供することにある。
【０００８】
【課題を解決するための手段】
本発明者らは、前記した課題の解決のため鋭意努力を重ねた結果、ミルベマイシン類を塩基で洗浄することにより、簡便に不要物を除去できることを見出し、本発明を完成した。
本発明は、
（１）ミルベマイシン類を塩基で洗浄することによるミルベマイシン類の精製法、
（２）ミルベマイシン類が、ミルベマイシンＡ3、ミルベマイシンＡ4、ミルベマイシンＤ、ミルベマイシンα11又はミルべマイシンα14から選択される化合物の一つ又は二つ以上の混合物である（１）記載の精製法、
（３）ミルベマイシン類が、ミルベマイシンＡ3、ミルベマイシンＡ4又はこれらの混合物である（１）又は（２）記載の精製法、
（４）溶剤中で行うことを特徴とする（１）乃至（３）から選ばれるいずれか一つに記載の精製法。
（５）ミルベマイシン類の酢酸エチル溶液を塩基で洗浄することを特徴とする、（１）乃至（４）から選ばれるいずれか一つに記載の精製法。
（６）塩基が、アミン類の溶液である、（１）乃至（５）から選ばれるいずれか一つに記載の精製法。
（７）塩基が、アンモニア水溶液である、（１）乃至（６）から選ばれるいずれか一つに記載の精製法である。
【０００９】
本発明における「ミルベマイシン類」としては、例えばミルベマイシンＡ3、ミルベマイシンＡ4、ミルベマイシンＤ、ミルベマイシンα11又はミルベマイシンα14から選択される化合物の１つ又は２つ以上の混合物を挙げることができ、好適には、ミルベマイシンＡ3、ミルベマイシンＡ4又はミルベマイシンＤから選択される化合物の１つ又は２つ以上の混合物を挙げることができ、さらに好適には、ミルベマイシンＡ3、ミルベマイシンＡ4又はこれらの混合物を挙げることが出来る。
【００１０】
本発明における「溶剤」としては、例えば、水；メタノール、エタノールもしくはｔ−ブタノールのようなアルコール類；アセトンもしくはメチルイソブチルケトンのようなケトン類；アセトニトリルのようなニトリル類；酢酸エチルのようなエステル類；塩化メチレン、クロロホルムもしくはジクロルエタンのようなハロゲン化炭化水素類；ジエチルエーテル、テトラヒドロフランもしくはジオキサンのようなエーテル類；ベンゼンもしくはトルエンのような芳香族炭化水素類；ジメチルホルムアミドもしくはジメチルアセトアミドのようなアミド類；ジメチルスルホキシドのようなスルホキシド類又はヘキサンもしくはオクタン等の脂肪族炭化水素類、及びこれらの混合溶媒があげられる。
【００１１】
本発明における「塩基」とは、ミルベマイシン類を分解させるものでなければ特に限定はないが、例えば、水酸化ナトリウム、水酸化カリウムもしくは水酸化リチウム等のようなアルカリ金属水酸化物；水酸化カルシウムもしくは水酸化マグネシウム等のようなアルカリ土類金属水酸化物；炭酸ナトリウム、炭酸カリウム、炭酸水素ナトリウムもしくは炭酸セシウム等のようなアルカリ金属炭酸塩又は炭酸カルシウム等のようなアルカリ土類金属炭酸塩のような無機の塩基類、あるいは、アンモニア、メチルアミン、ジメチルアミン、トリメチルアミン、エチルアミン、ジエチルアミン、トリエチルアミン、トリｎ−ブチルアミン、ジイソプロピルエチルアミン、１，４−ジアザビシクロ［２．２．２］オクタン（ＤＡＢＣＯ）、１，８−ジアザビシクロ［５．４．０］ウンデセ−７−エン（ＤＢＵ）、ピリジン、コリジン又は４−（Ｎ，Ｎ−ジメチルアミノ）ピリジンなどのアミン類等が挙げられ、好適には、アミン類が挙げられ、さらに好適には、アンモニアが挙げられる。
【００１２】
【発明の実施の形態】
本発明は、ミルベマイシン類を塩基で洗浄することによるミルベマイシン類の精製法である。
ここで、「ミルベマイシン類を塩基で洗浄する」とは、
（Ａ）ミルベマイシン類を溶剤に溶かし、その溶剤に溶けない塩基を加え攪拌等をおこなうこと、
（Ｂ）ミルベマイシン類を溶剤に溶かし、その溶剤と混ざらない溶剤に塩基を溶かし攪拌等をおこなうこと、
（Ｃ）塩基をミルベマイシン類の溶けない溶剤に溶かし、ミルベマイシン類を加え攪拌等をおこなうこと、
（Ｄ）ミルベマイシン類を、洗浄を行う温度で液体である塩基に加え攪拌等をおこなうこと等を示す。
これらのうち、好適には、
（１）上記（Ａ）乃至（Ｃ）があげられ、さらに好適には、
（２）上記（Ａ）又は（Ｂ）が挙げられ、さらにより好適には、
（３）上記（Ａ）又は（Ｂ）において、ミルベマイシン類を溶かす溶剤が酢酸エチルである場合が挙げられ、特に好適には、
（４）上記（Ａ）又は（Ｂ）において、ミルベマイシン類を溶かす溶剤が酢酸エチルで、塩基がアミン類である場合が挙げられ、最も好適には、
（５）上記（Ｂ）において、ミルベマイシン類を溶かす溶剤が酢酸エチルで、塩基がアンモニアでその溶剤が水である場合が挙げられる。
【００１３】
ミルベマイシン類は、前記したようにいずれも殺虫、殺ダニ活性又は駆虫活性を有することが知られている公知の化合物であり、ミルベマイシンＡ3及びミルベマイシンＡ4は特開昭５５−１３１３９８号公報に、ミルベマイシンＤは特開昭５６−３２４８１号公報に、ミルベマイシンα11及びミルベマイシンα14は特開平１−１９３２７０号公報にそれぞれ記載されている方法により、製造することが出来る。
【００１４】
ミルベマイシン類を塩基で洗浄する際の時間は、特に限定はないが、通常１５分乃至２日間であり、好適には３０分乃至３時間である。その際の温度は、通常０乃至８０℃であり、好適には２０乃至４０℃である。
【００１５】
使用される塩基の使用量は、ミルベマイシン類の純度により大巾に変わりうるが、通常、ミルベマイシン類に対して重量比で２０％乃至１０倍量であり、好適には５０％乃至５倍量である。
【００１６】
洗浄工程終了後は、上記
（Ａ）の場合は、常法に従い塩基をろ過後、ろ液を、必要に応じて、例えば硫酸水溶液等の酸性の溶液で洗浄後、減圧下又は常圧で濃縮することにより、純度の改善されたミルベマイシン類を得ることができ、
（Ｂ）の場合は、ミルベマイシン類の溶けている溶液を抽出し、必要に応じて、例えば硫酸水溶液等の酸性の溶液で洗浄後、減圧下又は常圧で濃縮することにより、純度の改善されたミルベマイシン類を得ることができ、
（Ｃ）及び（Ｄ）の場合は、ミルベマイシン類をろ過し、適当な溶剤で洗浄することにより、純度の改善されたミルベマイシン類を得ることができる。
【００１７】
さらに必要に応じて、より高い純度の化合物を必要とする場合には、再結晶化法や液−液分配法、誘導化法などの方法を組み合わせることもできる。
【００１８】
【実施例】
本発明をさらに具体的に説明するために、以下に実施例等を示すが、本発明はこれに限定されるものではない。
（実施例１）
ミルベマイシンA3とミルベマイシンA4の発酵培養液由来のケーキから酢酸エチル溶液を調製した。一部を減圧下で濃縮した結果、その濃縮残渣の純度は28%（ミルベマイシンA3:4.2％；ミルベマイシンA4:23.8％）であった。当該酢酸エチル溶液（130ml）を、5%アンモニア水63ml、5%硫酸水溶液39mlで順次洗浄した。この酢酸エチル溶液を濃縮して得られた残渣にメタノール300mlと水300mlを順次添加し、その後、アイソパーE（エクソンモービル社製炭化水素系溶媒：オクタン60-70%、ノナン30-40%混合物）で抽出した。得られたアイソパーE溶液を減圧下で濃縮することにより再結晶化、ついで濾取を行うことにより、ミルベマイシンA3とミルベマイシンA4の結晶3.06g (収率75%)を得た。その純度は95%（ミルベマイシンA3:15.2％；ミルベマイシンA4:79.8％）であった。
【００１９】
ミルベマイシンA3とミルベマイシンA4の含有量、純度は下記の条件で高速液体クロマトグラフィーを用いて決定した。参考例１においても同様に決定した。
高速液体クロマトグラフィー条件
カラム：Wakosil-II 5C18 HG φ4.6×250mm
溶媒：アセトニトリル/水＝80/20
流速：1.0ml/min
検出：UV240nm
（参考例１）
ミルベマイシンA3とミルベマイシンA4の発酵培養液由来のケーキより調製したメタノール溶液１Lを濃縮し、得られた残渣をシリカゲル（ワコーゲルC-100、４００g使用）カラムクロマトグラフィーに付した。酢酸エチル-ヘキサン混合溶媒で展開し、得られたミルベマイシンA3とミルベマイシンA4含有画分を濃縮した。得られた残渣を再結晶に付した後、濾取することによりミルベメクチンの結晶２.６９g（収率78％）を得た。その純度は95%（ミルベマイシンA3:14.3％；ミルベマイシンA4:80.7％）であった。
【００２０】
【発明の効果】
本発明により、クロマトグラフィーを用いない簡便、安価、かつ精製効果の高いミルベマイシン類の精製法が提供される。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a process for the purification of milbemycins on an industrial scale.
[0002]
[Prior art]
Milbemycins, which are 16-membered macrolide compounds obtained from microbial metabolites, are known to have insecticidal, acaricidal or anthelmintic activity, and examples thereof include the compounds shown in Table 1 below.
[0003]
[Table 1]
In producing these compounds, as with all microbial metabolites, they are usually rich in analogs and impurities. Therefore, when these compounds are produced industrially, it is necessary to carry out purification by a method that can be used as an industrial production method.
[0005]
As a general purification method of the above compound, the above compound is extracted from the fermentation culture with an organic solvent, and then silica gel, alumina, dextran gel, ion exchange resin, synthetic adsorbent, molecular sieve, C 8 H 17 , C A method is known in which a fraction containing the target compound obtained is subjected to chromatography using a carrier such as chemically bonded silica gel such as 18 H 37 and C 6 H 5 and concentrated to dryness (for example, (See Patent Document 1, Patent Document 2, Patent Document 3, or Patent Document 4.) However, in these chromatographic methods, since the loading amount of the carrier is low, a large amount of chromatographic carrier and an elution solvent such as an organic solvent must be used, the productivity is low, and the obtained refined product is expensive. Therefore, it is not always a satisfactory purification method industrially.
[0006]
[Patent Document 1]
Japanese Patent Laid-Open No. 50-29742 [Patent Document 2]
JP 55-131398 A [Patent Document 3]
JP-A-56-32481 [Patent Document 4]
Japanese Patent Laid-Open No. 1-193270
[Problems to be solved by the invention]
An object of the present invention is to provide an industrially complicated purification method, for example, a purification method of milbemycins that can easily remove unnecessary substances without using chromatography.
[0008]
[Means for Solving the Problems]
As a result of intensive efforts to solve the above-mentioned problems, the present inventors have found that unnecessary substances can be easily removed by washing milbemycins with a base, thereby completing the present invention.
The present invention
(1) A method for purifying milbemycins by washing them with a base,
(2) The purification method according to (1), wherein the milbemycins are one or a mixture of two or more compounds selected from milbemycin A 3 , milbemycin A 4 , milbemycin D, milbemycin α 11 or milbemycin α 14. ,
(3) The purification method according to (1) or (2), wherein the milbemycins are milbemycin A 3 , milbemycin A 4 or a mixture thereof.
(4) The purification method according to any one of (1) to (3), which is performed in a solvent.
(5) The purification method according to any one of (1) to (4), wherein an ethyl acetate solution of milbemycins is washed with a base.
(6) The purification method according to any one of (1) to (5), wherein the base is a solution of amines.
(7) The purification method according to any one of (1) to (6), wherein the base is an aqueous ammonia solution.
[0009]
Examples of the “milbemycins” in the present invention include one or a mixture of two or more compounds selected from milbemycin A 3 , milbemycin A 4 , milbemycin D, milbemycin α 11 or milbemycin α 14. May include one or a mixture of two or more compounds selected from milbemycin A 3 , milbemycin A 4 or milbemycin D, more preferably milbemycin A 3 , milbemycin A 4 or a mixture thereof. I can list them.
[0010]
Examples of the “solvent” in the present invention include water; alcohols such as methanol, ethanol or t-butanol; ketones such as acetone or methyl isobutyl ketone; nitriles such as acetonitrile; esters such as ethyl acetate. Halogenated hydrocarbons such as methylene chloride, chloroform or dichloroethane; ethers such as diethyl ether, tetrahydrofuran or dioxane; aromatic hydrocarbons such as benzene or toluene; amides such as dimethylformamide or dimethylacetamide And sulfoxides such as dimethyl sulfoxide or aliphatic hydrocarbons such as hexane or octane, and mixed solvents thereof.
[0011]
The “base” in the present invention is not particularly limited as long as it does not decompose milbemycins. For example, alkali metal hydroxide such as sodium hydroxide, potassium hydroxide or lithium hydroxide; calcium hydroxide Or alkaline earth metal hydroxides such as magnesium hydroxide; alkali metal carbonates such as sodium carbonate, potassium carbonate, sodium bicarbonate or cesium carbonate, or alkaline earth metal carbonates such as calcium carbonate. Inorganic bases such as ammonia, methylamine, dimethylamine, trimethylamine, ethylamine, diethylamine, triethylamine, tri-n-butylamine, diisopropylethylamine, 1,4-diazabicyclo [2.2.2] octane (DABCO), 1,8-di Examples thereof include amines such as zabicyclo [5.4.0] undec-7-ene (DBU), pyridine, collidine, 4- (N, N-dimethylamino) pyridine, and preferably amines. More preferably, ammonia is used.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The present invention is a method for purifying milbemycins by washing them with a base.
Here, "washing milbemycins with a base" means
(A) Dissolving milbemycins in a solvent, adding a base that does not dissolve in the solvent, stirring, etc.
(B) Dissolving milbemycins in a solvent, dissolving the base in a solvent that is not mixed with the solvent, stirring, etc.
(C) dissolving a base in a solvent that does not dissolve milbemycins, adding milbemycins and stirring,
(D) It shows that milbemycins are added to a base that is liquid at the temperature at which washing is performed and stirred.
Of these, preferably
(1) The above (A) to (C) are mentioned, and more preferably,
(2) The above (A) or (B) may be mentioned, and even more preferably,
(3) In the above (A) or (B), the solvent for dissolving milbemycins may be ethyl acetate, particularly preferably
(4) In the above (A) or (B), the solvent for dissolving milbemycins is ethyl acetate, and the base is an amine. Most preferably,
(5) In (B) above, the solvent for dissolving milbemycins is ethyl acetate, the base is ammonia, and the solvent is water.
[0013]
Milbemycins are known compounds that are known to have insecticidal, acaricidal or anthelmintic activity as described above. Milbemycin A 3 and milbemycin A 4 are disclosed in JP-A-55-131398. milbemycin D is in JP 56-32481, milbemycin alpha 11 and milbemycin alpha 14 by methods described respectively in JP-a-1-193270, can be produced.
[0014]
The time for washing milbemycins with a base is not particularly limited, but is usually 15 minutes to 2 days, preferably 30 minutes to 3 hours. The temperature at that time is usually 0 to 80 ° C., preferably 20 to 40 ° C.
[0015]
The amount of base used may vary widely depending on the purity of milbemycins, but is usually 20% to 10 times by weight, preferably 50% to 5 times the weight of milbemycins. is there.
[0016]
After completion of the washing step, in the case of (A) above, after filtering the base according to a conventional method, the filtrate is washed with an acidic solution such as an aqueous sulfuric acid solution, if necessary, and then concentrated under reduced pressure or atmospheric pressure. By doing so, milbemycins with improved purity can be obtained,
In the case of (B), the purity is improved by extracting a solution in which milbemycins are dissolved and, if necessary, washing with an acidic solution such as an aqueous sulfuric acid solution and then concentrating under reduced pressure or normal pressure. Milbemycins can be obtained,
In the case of (C) and (D), milbemycins with improved purity can be obtained by filtering milbemycins and washing with an appropriate solvent.
[0017]
Furthermore, when a compound with higher purity is required, methods such as a recrystallization method, a liquid-liquid distribution method, and a derivatization method can be combined as necessary.
[0018]
【Example】
In order to describe the present invention more specifically, examples and the like are shown below, but the present invention is not limited thereto.
Example 1
The ethyl acetate solution was prepared from milbemycin A 3 and cake from the fermentation broth of milbemycin A 4. As a result of concentrating a part under reduced pressure, the purity of the concentrated residue was 28% (milbemycin A 3 : 4.2%; milbemycin A 4 : 23.8%). The ethyl acetate solution (130 ml) was washed successively with 63 ml of 5% aqueous ammonia and 39 ml of 5% aqueous sulfuric acid. 300 ml of methanol and 300 ml of water were sequentially added to the residue obtained by concentrating this ethyl acetate solution, and then Isopar E (hydrocarbon solvent manufactured by ExxonMobil: octane 60-70%, nonane 30-40% mixture) Extracted with. The obtained Isopar E solution was recrystallized by concentrating under reduced pressure, and then filtered to obtain 3.06 g (yield 75%) of crystals of milbemycin A 3 and milbemycin A 4 . Its purity was 95% (milbemycin A 3 : 15.2%; milbemycin A 4 : 79.8%).
[0019]
The contents and purity of milbemycin A 3 and milbemycin A 4 were determined using high performance liquid chromatography under the following conditions. The same determination was made in Reference Example 1.
Column for high performance liquid chromatography: Wakosil-II 5C18 HG φ4.6 × 250mm
Solvent: acetonitrile / water = 80/20
Flow rate: 1.0ml / min
Detection: UV240nm
(Reference Example 1)
1 L of a methanol solution prepared from a cake derived from a fermentation broth of milbemycin A 3 and milbemycin A 4 was concentrated, and the resulting residue was subjected to column chromatography on silica gel (Wakogel C-100, 400 g used). The mixture was developed with a mixed solvent of ethyl acetate-hexane, and the obtained milbemycin A 3 and fraction containing milbemycin A 4 were concentrated. The obtained residue was recrystallized and then collected by filtration to obtain 2.69 g (yield 78%) of milbemectin crystals. Its purity was 95% (milbemycin A 3 : 14.3%; milbemycin A 4 : 80.7%).
[0020]
【The invention's effect】
The present invention provides a simple, inexpensive, and highly effective purification method for milbemycins that does not use chromatography.
Claims (6)
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002371866A JP4373080B2 (en) | 2002-12-24 | 2002-12-24 | Purification of milbemycins |
| CN200380107520.2A CN1732174B (en) | 2002-12-24 | 2003-12-22 | Method for purification of milbemycins |
| AU2003296180A AU2003296180A1 (en) | 2002-12-24 | 2003-12-22 | Method for purification of milbemycins |
| PCT/JP2003/016438 WO2004058771A1 (en) | 2002-12-24 | 2003-12-22 | Method for purification of milbemycins |
| KR1020057011825A KR101090047B1 (en) | 2002-12-24 | 2003-12-22 | Method for purification of milbemycins |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002371866A JP4373080B2 (en) | 2002-12-24 | 2002-12-24 | Purification of milbemycins |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2004203757A JP2004203757A (en) | 2004-07-22 |
| JP2004203757A5 JP2004203757A5 (en) | 2006-02-16 |
| JP4373080B2 true JP4373080B2 (en) | 2009-11-25 |
Family
ID=32677215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002371866A Expired - Lifetime JP4373080B2 (en) | 2002-12-24 | 2002-12-24 | Purification of milbemycins |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP4373080B2 (en) |
| KR (1) | KR101090047B1 (en) |
| CN (1) | CN1732174B (en) |
| AU (1) | AU2003296180A1 (en) |
| WO (1) | WO2004058771A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2886640A1 (en) | 2013-12-18 | 2015-06-24 | Riga Technical University | Process for isolation of milbemycins A3 and A4 |
| CN110437248B (en) * | 2017-04-19 | 2020-09-01 | 丽珠集团福州福兴医药有限公司 | Production method of milbemycins capable of shortening production cycle |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4582852A (en) * | 1983-11-02 | 1986-04-15 | Ciba-Geigy Corporation | 14- and 15-hydroxy milbemycin derivatives for controlling plant and animal parasites |
| GB2168345B (en) * | 1984-12-14 | 1988-05-25 | Ciba Geigy Ag | Pesticidal 13b-substituted milbemycin derivatives |
| FI860233A (en) * | 1985-01-22 | 1986-07-23 | Ciba Geigy Ag | 13 -ALKYL-MILBEMYCINDERIVAT FOER BEKAEMPNING AV PARASITER HOS DJUR OCH VAEXTER. |
| JPH0678342B2 (en) * | 1986-01-07 | 1994-10-05 | 三共株式会社 | New macrolide compound |
| AR243528A1 (en) * | 1986-12-11 | 1993-08-31 | Sankyo Co | A procedure for preparing macrolide compounds, and a procedure producing a pesticide compound with them. |
| US4855317A (en) * | 1987-03-06 | 1989-08-08 | Ciba-Geigy Corporation | Insecticides and parasiticides |
| JP2849389B2 (en) * | 1988-07-05 | 1999-01-20 | 三共株式会社 | New macrolide compound |
| NZ233680A (en) * | 1989-05-17 | 1995-02-24 | Beecham Group Plc | Avermectins and milbemycins and compositions thereof |
| NZ242592A (en) * | 1991-05-13 | 1993-12-23 | Merck & Co Inc | PROCESS FOR CONVERTING 13#a# HYDROXY AVERMECTIN AGLYCONES TO THE 13#B# |
| US5262400A (en) * | 1991-06-20 | 1993-11-16 | Merck & Co., Inc. | 4α-substituted avermectin derivatives |
| JPH0717979A (en) * | 1993-06-30 | 1995-01-20 | Takeda Chem Ind Ltd | Physiologically active substance ad-24-1b |
| BR9407141A (en) * | 1993-07-23 | 1996-09-17 | Pfizer | Method for the precipitation of natural avermectins |
| JPH08134071A (en) * | 1994-11-04 | 1996-05-28 | Sankyo Co Ltd | New 13-site-substituted milbemycin derivative |
| JP3499097B2 (en) * | 1995-09-22 | 2004-02-23 | 三共アグロ株式会社 | Insecticidal milbemycin derivatives having a substituent containing an oxime group at position 13 |
| NZ299460A (en) * | 1995-09-29 | 1997-12-19 | Sankyo Co | 13-substituted milbemycin 5-oxime derivatives; veterinary pesticides |
-
2002
- 2002-12-24 JP JP2002371866A patent/JP4373080B2/en not_active Expired - Lifetime
-
2003
- 2003-12-22 KR KR1020057011825A patent/KR101090047B1/en active IP Right Grant
- 2003-12-22 CN CN200380107520.2A patent/CN1732174B/en not_active Expired - Lifetime
- 2003-12-22 WO PCT/JP2003/016438 patent/WO2004058771A1/en active Application Filing
- 2003-12-22 AU AU2003296180A patent/AU2003296180A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| AU2003296180A1 (en) | 2004-07-22 |
| CN1732174A (en) | 2006-02-08 |
| CN1732174B (en) | 2015-05-20 |
| KR20050085876A (en) | 2005-08-29 |
| JP2004203757A (en) | 2004-07-22 |
| WO2004058771A1 (en) | 2004-07-15 |
| KR101090047B1 (en) | 2011-12-07 |
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