JP2710837B2 - Method for producing optically active β-hydroxythioester - Google Patents

Method for producing optically active β-hydroxythioester

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Publication number
JP2710837B2
JP2710837B2 JP1203142A JP20314289A JP2710837B2 JP 2710837 B2 JP2710837 B2 JP 2710837B2 JP 1203142 A JP1203142 A JP 1203142A JP 20314289 A JP20314289 A JP 20314289A JP 2710837 B2 JP2710837 B2 JP 2710837B2
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JP
Japan
Prior art keywords
mmol
group
optically active
hydroxythioester
methyl
Prior art date
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Expired - Fee Related
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JP1203142A
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Japanese (ja)
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JPH0366664A (en
Inventor
光昭 向山
修 小林
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Kuraray Co Ltd
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Kuraray Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/50Improvements relating to the production of bulk chemicals
    • Y02P20/52Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は光学活性なβ−ヒドロキシチオエステルの製
造法に関する。
Description: TECHNICAL FIELD The present invention relates to a method for producing an optically active β-hydroxythioester.

本発明によって製造されるβ−ヒドロキシチオエステ
ルは各種天然物、医薬などの生理活性化合物の合成中間
体として有用である。
The β-hydroxythioester produced by the present invention is useful as an intermediate for synthesizing biologically active compounds such as various natural products and medicines.

[従来の技術] β−ヒドロキシチオエステルはβ−ヒドロキシエステ
ル等価体として用いられ、なかでもα−メチル−β−ヒ
ドロキシチオエステルのα−メチル−β−ヒドロキシカ
ルボニル部分はマクロライド抗生物質の合成中間体とし
て用いられている[ジャーナル・オブ・ジ・アメリカン
・ケミカル・ソサイエティ(Journal of the American
Chemical Society)、第108(26)巻、第8279頁(1986
年)参照]。
[Background Art] β-Hydroxythioester is used as a β-hydroxyester equivalent, in which the α-methyl-β-hydroxycarbonyl moiety of α-methyl-β-hydroxythioester is used as a synthetic intermediate for macrolide antibiotics. [Journal of the American Chemical Society (Journal of the American Chemical Society)
Chemical Society), 108 (26), 8279 (1986)
Year)].

β−ヒドロキシチオエステルの製造方法としては、ス
ルホニウムイリドを還元する方法[ブレタン・オブ・ザ
・ケミカル・ソサイエティ・オブ・ジャパン(Bulletan
of the Chemical Society of Japan)、第50(6)
巻、第1645頁(1977年)参照]、炭素−炭素二重結合を
有する光学活性なホウ素化合物とアルデヒドをアルドー
ル反応させる方法[ジャーナル・オブ・ジ・アメリカン
・ケミカル・ソサイエティ、第108(26)巻、第8279頁
(1986年)参照]などが報告されている。
As a method for producing β-hydroxythioester, a method for reducing a sulfonium ylide [Bulletan of the Chemical Society of Japan (Bulletan
of the Chemical Society of Japan), No. 50 (6)
Vol. 1645 (1977)], an aldol reaction of an optically active boron compound having a carbon-carbon double bond with an aldehyde [Journal of the American Chemical Society, 108 (26). Volume, p. 8279 (1986)].

[発明が解決しようとする課題] β−ヒドロキシチオエステルは各種天然物、医薬など
の生理活性物質の合成中間体として有用であり、高い光
学純度でかつ収率よく合成する方法の開発は強く望まれ
ている。
[Problems to be Solved by the Invention] β-Hydroxythioesters are useful as synthetic intermediates of physiologically active substances such as various natural products and medicines, and the development of a method for synthesizing them with high optical purity and high yield is strongly desired. ing.

しかしながら、従来知られているβ−ヒドロキシチオ
エステルの製造方法には光学収率が必ずしも高くないこ
と、光学活性な原料の合成が煩雑であることなどの問題
点がある。
However, conventionally known methods for producing β-hydroxythioester have problems that the optical yield is not always high and that the synthesis of optically active raw materials is complicated.

しかして、本発明の目的は、光学活性なβ−ヒドロキ
シチオエステルを高い光学純度でかつ高収率で製造する
方法を提供することにある。
Accordingly, an object of the present invention is to provide a method for producing an optically active β-hydroxythioester with high optical purity and high yield.

[課題を解決するための手段] 本発明によれば、上記の目的は、一般式(I) R1CHO (I) (式中、R1はアルキル基、シクロアルキル基、アラルキ
ル基又はアリール基を表す。) で示されるアルデヒドと一般式(II) (式中、R2及びR4はそれぞれアルキル基を表し、R3は水
素原子又はアルキル基を表す。) で示されるシリルエノールエーテルとを光学活性なジア
ミンおよびスズ試薬の存在下に反応させることを特徴と
する一般式(III) (式中、R1、R2及びR3は上記定義の通りであり、Cは
不斉炭素原子を表す。) で示される光学活性β−ヒドロキシチオエステルを製造
する方法を提供することによって達成される。
[Means for Solving the Problems] According to the present invention, the above object is achieved by preparing a compound represented by the general formula (I) R 1 CHO (I) wherein R 1 is an alkyl group, a cycloalkyl group, an aralkyl group or an aryl group. And an aldehyde represented by the general formula (II) (Wherein, R 2 and R 4 each represent an alkyl group, and R 3 represents a hydrogen atom or an alkyl group.) In the presence of an optically active diamine and a tin reagent. General formula (III) characterized by (Wherein R 1 , R 2 and R 3 are as defined above, and * C represents an asymmetric carbon atom.) This is achieved by providing a method for producing an optically active β-hydroxythioester represented by the following formula: Is done.

上記一般式においてR1、R2、R3およびR4がそれぞれ表
すアルキル基としては、炭素数1〜7の低級アルキル基
が好ましく、例えばメチル基、エチル基、プロピル基、
イソプロピル基、ブチル基、t−ブチル基、ペンチル
基、ヘキシル基、ヘプチル基などが挙げられる。またR1
が表すシクロアルキル基としてはシクロペンチル基、シ
クロヘキシル基などが例示され、アラルキル基としては
ベンジル基、フェネチル基などが例示され、またアリー
ル基としては置換基を有していてもよいフェニル基、ナ
フチル基などが例示されている。ここでフェニル基、ナ
フチル基が有していてもよい置換基としてはメチル基、
エチル基などの低級アルキル基、塩素原子、臭素原子な
どのハロゲン原子またはメトキシ基、エトキシ基などの
低級アルコキシ基などが挙げられる。
As the alkyl group represented by R 1 , R 2 , R 3 and R 4 in the above general formula, a lower alkyl group having 1 to 7 carbon atoms is preferable, for example, a methyl group, an ethyl group, a propyl group,
Examples thereof include an isopropyl group, a butyl group, a t-butyl group, a pentyl group, a hexyl group, and a heptyl group. Also R 1
Examples of the cycloalkyl group represented by include a cyclopentyl group and a cyclohexyl group, examples of the aralkyl group include a benzyl group and a phenethyl group, and examples of the aryl group include a phenyl group and a naphthyl group which may have a substituent. Are exemplified. Here, a phenyl group and a substituent which the naphthyl group may have may be a methyl group,
Examples thereof include a lower alkyl group such as an ethyl group, a halogen atom such as a chlorine atom and a bromine atom, and a lower alkoxy group such as a methoxy group and an ethoxy group.

本発明において用いられる光学活性なジアミンとして
は1−メチル−2−(1−ピペリジニルメチル)ピロリ
ジン、1−メチル−2−(1−ナフチルアミノメチル)
ピロリジン、2−(2−メトキシメチルピロリジン−1
−イルメチル)−1−メチルピロリジンなどの2−アミ
ノアルキルピロリジン誘導体が好ましい。また、スズ試
薬としてはスズ(II)トリフラートとフッ化トリブチル
スズの組合せを用いるのが好ましい。
As the optically active diamine used in the present invention, 1-methyl-2- (1-piperidinylmethyl) pyrrolidine, 1-methyl-2- (1-naphthylaminomethyl)
Pyrrolidine, 2- (2-methoxymethylpyrrolidine-1
2-Aminoalkylpyrrolidine derivatives such as -ylmethyl) -1-methylpyrrolidine are preferred. Further, it is preferable to use a combination of tin (II) triflate and tributyltin fluoride as a tin reagent.

本発明の好適な実施態様をスズ試薬としてスズ(II)
トリフラートとフッ化トリブチルスズとの組合せを用い
る場合を例にとって次に説明する。
A preferred embodiment of the present invention uses tin (II) as a tin reagent.
The following describes an example in which a combination of triflate and tributyltin fluoride is used.

スズ(II)トリフラートと該スズ(II)トリフラート
に対して1.0〜1.2モル当量のフッ化トリブチルスズ及び
該スズ(II)トリフラートに対して1.0〜1.5モル当量の
光学活性ジアミンをジクロロメタン、クロロホルムなど
の不活性溶媒に溶解し、得られた溶液に該スズ(II)ト
リフラートに対して0.9〜1.1モル当量の一般式(II)で
示されるシリルエノールエーテルを−100〜−30℃の範
囲の温度、好ましくは−78℃で添加し、次いで同温度で
該スズ(II)トリフラートに対して0.9〜1.1モル当量の
一般式(I)で示されるアルデヒドを加えたのち、1〜
15時間撹拌することにより、一般式(III)で示される
光学活性β−ヒドロキシチオエステルを製造することが
できる。
Tin (II) triflate and 1.0 to 1.2 molar equivalents of tributyltin fluoride and 1.0 to 1.5 molar equivalents of optically active diamine with respect to the tin (II) triflate with respect to the tin (II) triflate can be added to dichloromethane, chloroform or the like. It is dissolved in an active solvent, and 0.9 to 1.1 molar equivalents of the silyl enol ether represented by the general formula (II) with respect to the tin (II) triflate is added to the resulting solution at a temperature in the range of -100 to -30 ° C, preferably Is added at −78 ° C., and at the same temperature, 0.9 to 1.1 molar equivalents of the aldehyde represented by the general formula (I) with respect to the tin (II) triflate are added.
By stirring for 15 hours, an optically active β-hydroxythioester represented by the general formula (III) can be produced.

反応液からの一般式(III)で示される光学活性β−
ヒドロキシチオエステルの分離・精製は常法に従って行
うことができる。例えば、反応液を重曹水にあけ、ジク
ロロメタン、ジエチルエーテルなどで抽出したのち、シ
リカゲルカラムクロマトグラフィ、薄層クロマトグラフ
ィなどの分離・精製手段に付することにより、一般式
(III)で示される光学活性β−ヒドロキシチオエステ
ルを得ることができる。
Optically active β- represented by the general formula (III) from the reaction solution
Separation and purification of the hydroxythioester can be performed according to a conventional method. For example, the reaction solution is poured into an aqueous solution of sodium bicarbonate, extracted with dichloromethane, diethyl ether, or the like, and then subjected to separation and purification means such as silica gel column chromatography and thin layer chromatography to obtain an optically active β represented by the general formula (III). -Hydroxythioesters can be obtained.

一般式(I)で示されるアルデヒド及び一般式(II)
で示されるシリルエノールエーテルは公知化合物であ
る。
Aldehydes of general formula (I) and general formula (II)
The silyl enol ether represented by is a known compound.

[実施例] 以下に、実施例により本発明を具体的に説明するが、
本発明はこれにより限定されるものではない。
EXAMPLES Hereinafter, the present invention will be described specifically with reference to Examples.
The present invention is not limited by this.

実施例1 スズ(II)トリフラート0.4mmol及び(S)−1−メ
チル−2−(1−ピペリジニルメチル)ピロリジン0.48
mmolをジクロロメタン1mlに溶解し、この溶液に室温に
てフッ化トリブチルスズ0.44mmolを加え、30分間撹拌し
た。反応液を−78℃に冷却したのち、その反応液に1−
エチルチオ−1−トリメチルシロキシエテン0.4mmolを
ジクロロメタン0.5mlに溶解した溶液を滴下し、30分間
撹拌した。得られた反応液にベンズアルデヒド0.36mmol
とジクロロメタン1mlからなる溶液を加え、12時間撹拌
したのち、得られた反応液に重曹水を加え、ジクロロメ
タンで抽出した。抽出液を乾燥後、減圧下に濃縮し、得
られた残渣をシリカゲル薄層クロマトグラフィで精製す
ることにより、下記の物性を有する(S)−S−エチル
3−ヒドロキシ−3−フェニルプロパンチオアート5
9.0mgを得た(収率78%)。1 H−NMRスペクトル(CCl4)δ:1.15(t,3H,J=7.0Hz),
2.70(q,2H,J=7.0Hz),2.70(d,2H,J=6.0Hz),3.10
(brs,1H),4.85(t,1H,J=6.0Hz),7.00(m,5Hz) 光学純度 82% 実施例2および3 実施例1において、(S)−1−メチル−2−(1−
ピペリジニルメチル)ピロリジン0.48mmolの代わりに
(S)−1−メチル−2−(1−ナフチルアミノメチ
ル)ピロリジン0.48mmol又は(S,S)−2−(2−メト
キシメチルピロリジン−1−イルメチル)−1−メチル
ピロリジン0.48mmolを用いた以外は実施例1と同様に反
応及び分離・精製を行うことにより,(S)−エチル
3−ヒドロキシ−3−フェニルプロパンチオアートを得
た。それぞれの反応成績を第1表に示す。
Example 1 0.4 mmol of tin (II) triflate and 0.48 of (S) -1-methyl-2- (1-piperidinylmethyl) pyrrolidine
mmol was dissolved in 1 ml of dichloromethane, and 0.44 mmol of tributyltin fluoride was added to this solution at room temperature, followed by stirring for 30 minutes. After cooling the reaction solution to −78 ° C.,
A solution of 0.4 mmol of ethylthio-1-trimethylsiloxyethene in 0.5 ml of dichloromethane was added dropwise, and the mixture was stirred for 30 minutes. 0.36 mmol of benzaldehyde was added to the obtained reaction solution.
And 1 ml of dichloromethane, and after stirring for 12 hours, aqueous sodium hydrogen carbonate was added to the obtained reaction solution, followed by extraction with dichloromethane. The extract is dried, concentrated under reduced pressure, and the obtained residue is purified by silica gel thin layer chromatography to give (S) -S-ethyl 3-hydroxy-3-phenylpropanethioate 5 having the following physical properties.
9.0 mg was obtained (78% yield). 1 H-NMR spectrum (CCl 4 ) δ: 1.15 (t, 3H, J = 7.0 Hz),
2.70 (q, 2H, J = 7.0Hz), 2.70 (d, 2H, J = 6.0Hz), 3.10
(Brs, 1H), 4.85 (t, 1H, J = 6.0 Hz), 7.00 (m, 5 Hz) Optical purity 82% Examples 2 and 3 In Example 1, (S) -1-methyl-2- (1-
(S) -1-methyl-2- (1-naphthylaminomethyl) pyrrolidine 0.48 mmol or (S, S) -2- (2-methoxymethylpyrrolidin-1-ylmethyl) instead of piperidinylmethyl) pyrrolidine 0.48 mmol ) By performing the reaction, separation and purification in the same manner as in Example 1 except that 0.48 mmol of 1-methylpyrrolidine was used, (S) -ethyl
3-Hydroxy-3-phenylpropanethioate was obtained. Table 1 shows the results of each reaction.

実施例4 実施例1において、1−エチルチオ−1−トリメチル
シロキシエテン0.4mmolの代わりに1−t−ブチルチオ
−1−トリメチルシロキシエテン0.4mmolを用いた以外
は実施例1と同様に反応及び分離・精製を行うことによ
り、下記の物性を有する(S)−S−t−ブチル 3−
ヒドロキシ−3−フェニルプロパンチオアート62.5mgを
得た(収率73%)。1 H−NMRスペクトル(CCl4)δ:1.45(s,9H),2.65(d,2
H,J=6.0Hz),3.05(brs,1H),4.85(t,1H,J=6.0Hz),
7.00(m,5H) 光学純度 86% 実施例5〜7 実施例1において、ベンズアルデヒド0.36mmolの代わ
りにβ−フェニルプロピオンアルデヒド0.36mmol、イソ
ブチルアルデヒド0.36mmol又は、トリメチルアセトアル
デヒド0.36mmolを用いた以外は実施例1と同様に反応及
び分類・精製を行うことにより、それぞれ対応する
(S)−S−エチル 3−ヒドロキシ−5−フェニルペ
ンタンチオアート、(S)−S−エチル 3−ヒドロキ
シ−4−メチルペンタンチオアート、(S)−S−エチ
ル 3−ヒドロキシ−4,4−ジメチルペンタンチオアー
トを得た。それぞれの反応成績を第2表に示す。
Example 4 A reaction and separation were performed in the same manner as in Example 1 except that 0.4 mmol of 1-t-butylthio-1-trimethylsiloxyethene was used instead of 0.4 mmol of 1-ethylthio-1-trimethylsiloxyethene. By performing purification, (S) -St-butyl 3-
62.5 mg of hydroxy-3-phenylpropanethioate was obtained (yield 73%). 1 H-NMR spectrum (CCl 4 ) δ: 1.45 (s, 9H), 2.65 (d, 2
H, J = 6.0Hz), 3.05 (brs, 1H), 4.85 (t, 1H, J = 6.0Hz),
7.00 (m, 5H) Optical purity 86% Examples 5-7 In Example 1, the reaction, classification and purification were performed in the same manner as in Example 1 except that 0.36 mmol of β-phenylpropionaldehyde, 0.36 mmol of isobutyraldehyde, or 0.36 mmol of trimethylacetaldehyde was used instead of 0.36 mmol of benzaldehyde. The corresponding (S) -S-ethyl 3-hydroxy-5-phenylpentanethioate, (S) -S-ethyl 3-hydroxy-4-methylpentanethioate, (S) -S-ethyl 3-hydroxy-, respectively. 4,4-Dimethylpentanethioate was obtained. Table 2 shows the results of each reaction.

実施例8 スズ(II)トリフラート0.4mmol及び(S)−1−メ
チル−2−(1−ナフチルアミノメチル)ピロリジン0.
48mmolをジクロロメタン1mlに溶解し、この溶液に室温
にてフッ化トリブチルスズ0.44mmolを加え、30分間撹拌
した。反応液を−78℃に冷却したのち、その反応液に
(Z)−1−エチルチオ−1−トリメチルシロキシ−1
−プロペン0.4mmolをジクロロメタン0.5mlに溶解した溶
液を滴下し、30分間撹拌した。得られた反応液にベンズ
アルデヒド0.36mmolとジクロロメタン1mlからなる溶液
を加え、3時間撹拌した後、得られた反応溶液に重曹水
を加え、ジクロロメタンで抽出した。抽出液を乾燥後、
減圧下に濃縮し、得られた残渣をシリカゲル薄層クロマ
トグラフィで精製することにより、下記の特性を有する
(2S,3S)−S−エチル 2−メチル−3−ヒドロキシ
−3−フェニルプロパンチオアート69.4mgを得た(収率
86%、syn100%)。なお、光学純度は(S)−メトキシ
トリフルオロメチルフェニル酢酸のエステルとしてジア
ステレオマーの比率より求めた。1 H−NMRスペクトル(CCl4)δ:1.10(d,3H,J=7.0Hz),
1.15(t,3H,J=7.0Hz),2.65(brs,1H),2.75(m,1H),
2.80(q,2H,J=7.0Hz),5.00(d,1H,J=4.0Hz),7.20
(m,5H) 光学純度 >98% 実施例9および10 実施例8において、(S)−1−メチル−2−(1−
ナフチルアミノメチル)ピロリジン0.48mmolの代わりに
(S)−1−メチル−2−(1−ピペリジニルメチル)
ピロリジン0.48mmol又は(S,S)−2−(2−メトキシ
メチルピロリジン−1−イルメチル)−1−メチルピロ
リジン0.48mmolを用い、ベンズアルデヒド添加後20時間
撹拌した以外は実施例8と同様に反応及び分離・精製を
行うことにより(2S,3S)−S−エチル 2−メチル−
3−ヒドロキシ−3−フェニルプロパンチオアートを得
た。それぞれの反応成績を第3表に示す。
Example 8 0.4 mmol of tin (II) triflate and (S) -1-methyl-2- (1-naphthylaminomethyl) pyrrolidine.
48 mmol was dissolved in 1 ml of dichloromethane, and 0.44 mmol of tributyltin fluoride was added to this solution at room temperature, followed by stirring for 30 minutes. After cooling the reaction mixture to -78 ° C, the reaction mixture was added with (Z) -1-ethylthio-1-trimethylsiloxy-1
A solution of 0.4 mmol of propene in 0.5 ml of dichloromethane was added dropwise and stirred for 30 minutes. A solution consisting of benzaldehyde 0.36 mmol and dichloromethane 1 ml was added to the obtained reaction solution, and the mixture was stirred for 3 hours. Then, aqueous sodium bicarbonate was added to the obtained reaction solution, followed by extraction with dichloromethane. After drying the extract,
The residue was purified by silica gel thin layer chromatography under reduced pressure to give (2S, 3S) -S-ethyl 2-methyl-3-hydroxy-3-phenylpropanethioate 69.4 having the following properties. mg (yield
86%, syn100%). The optical purity was determined from the ratio of diastereomers as (S) -methoxytrifluoromethylphenylacetic acid ester. 1 H-NMR spectrum (CCl 4 ) δ: 1.10 (d, 3H, J = 7.0 Hz),
1.15 (t, 3H, J = 7.0Hz), 2.65 (brs, 1H), 2.75 (m, 1H),
2.80 (q, 2H, J = 7.0Hz), 5.00 (d, 1H, J = 4.0Hz), 7.20
(M, 5H) Optical purity> 98% Examples 9 and 10 In Example 8, (S) -1-methyl-2- (1-
(S) -1-methyl-2- (1-piperidinylmethyl) instead of 0.48 mmol of naphthylaminomethyl) pyrrolidine
The reaction and reaction were carried out in the same manner as in Example 8 except that 0.48 mmol of pyrrolidine or 0.48 mmol of (S, S) -2- (2-methoxymethylpyrrolidin-1-ylmethyl) -1-methylpyrrolidine was used and stirred for 20 hours after adding benzaldehyde. By performing separation and purification, (2S, 3S) -S-ethyl 2-methyl-
3-Hydroxy-3-phenylpropanethioate was obtained. Table 3 shows the results of each reaction.

実施例11〜16 実施例8において、ベンズアルデヒド0.36mmolの代わ
りにp−クロロベンズアルデヒド0.36mmol、p−メチル
ベンズアルデヒド0.36mmol、p−メトキシベンズアルデ
ヒド0.36mmol、イソブチルアルデヒド0.36mmol、シクロ
ヘキサンカルブアルデヒド0.36mmol又はオクタナール0.
36mmolを用いた以外は実施例8と同様に反応及び分離・
精製を行うことにより、それぞれ対応する(2S,3S)−
S−エチル 2−メチル−3−ヒドロキシ−3−(4−
クロロフェニル)プロパンチオアート、(2S,3S)−S
−エチル 2−メチル−3−ヒドロキシ−3−(4−メ
チルフェニル)プロパンチオアート、(2S,3S)−S−
エチル2−メチル−3−ヒドロキシ−3−(4−メトキ
シフェニル)プロパンチオアート、(2S,3R)−S−エ
チル 2−メチル−3−ヒドロキシ−4−メチルペンタ
ンチオアート、(2S,3R)−S−エチル 2−メチル−
3−ヒドロキシ−3−シクロヘキシルプロパンチオアー
ト又は(2S,3R)−S−エチル 2−メチル−3−ヒド
ロキシデカンチオアートを得た。それぞれの反応成績を
第4表に示す。
Examples 11 to 16 In Example 8, 0.36 mmol of p-chlorobenzaldehyde, 0.36 mmol of p-methylbenzaldehyde, 0.36 mmol of p-methoxybenzaldehyde, 0.36 mmol of isobutyraldehyde, 0.36 mmol of cyclohexanecarbaldehyde or 0.36 mmol of octanal are used instead of 0.36 mmol of benzaldehyde.
Reaction and separation were performed in the same manner as in Example 8 except that 36 mmol was used.
By performing purification, the corresponding (2S, 3S)-
S-ethyl 2-methyl-3-hydroxy-3- (4-
(Chlorophenyl) propanethioate, (2S, 3S) -S
-Ethyl 2-methyl-3-hydroxy-3- (4-methylphenyl) propanethioate, (2S, 3S) -S-
Ethyl 2-methyl-3-hydroxy-3- (4-methoxyphenyl) propanethioate, (2S, 3R) -S-ethyl 2-methyl-3-hydroxy-4-methylpentanethioate, (2S, 3R) -S-ethyl 2-methyl-
3-Hydroxy-3-cyclohexylpropanethioate or (2S, 3R) -S-ethyl 2-methyl-3-hydroxydecanethioate was obtained. Table 4 shows the results of each reaction.

実施例17 実施例8において、(Z)−1−エチルチオ−1−ト
リメチルシロキシ−1−プロペン0.4mmolの代わりに
(E)−1−エチルチオ−1−トリメチルシロキシ−1
−プロペン0.4mmolを用いた以外は実施例8と同様に反
応及び分離・精製を行うことにより、S−エチル 2−
メチル−3−ヒドロキシ−3−フェニルプロパンチオア
ート52.4mgを得た(収率65%、syn/anti=70/30)。
Example 17 In Example 8, (E) -1-ethylthio-1-trimethylsiloxy-1 was used instead of 0.4 mmol of (Z) -1-ethylthio-1-trimethylsiloxy-1-propene.
-Reaction, separation and purification were carried out in the same manner as in Example 8 except that 0.4 mmol of propene was used, whereby S-ethyl 2-
52.4 mg of methyl-3-hydroxy-3-phenylpropanethioate was obtained (yield: 65%, syn / anti = 70/30).

syn体の光学純度 55% [発明の効果] 本発明によれば、前記一般式(III)で表される光学
活性β−ヒドロキシチオエステルを高い光学収率かつ高
収率で製造することが可能である。
According to the present invention, the optically active β-hydroxythioester represented by the general formula (III) can be produced with high optical yield and high yield. is there.

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】一般式 R1CHO (式中、R1はアルキル基、シクロアルキル基、アラルキ
ル基又はアリール基を表す。) で示されるアルデヒドと一般式 (式中、R2及びR4はそれぞれアルキル基を表し、R3は水
素原子又はアルキル基を表す。) で示されるシリルエノールエーテルとを光学活性なジア
ミンおよびスズ試薬の存在下に反応させることを特徴と
する一般式 (式中、R1、R2及びR3は上記定義の通りであり、Cは
不斉炭素原子を表す。) で示される光学活性β−ヒドロキシチオエステルの製造
方法。
An aldehyde represented by the general formula R 1 CHO (where R 1 represents an alkyl group, a cycloalkyl group, an aralkyl group or an aryl group) and a general formula: (Wherein, R 2 and R 4 each represent an alkyl group, and R 3 represents a hydrogen atom or an alkyl group.) In the presence of an optically active diamine and a tin reagent. General formula characterized by (In the formula, R 1 , R 2 and R 3 are as defined above, and * C represents an asymmetric carbon atom.) A method for producing an optically active β-hydroxythioester represented by the formula:
JP1203142A 1989-08-04 1989-08-04 Method for producing optically active β-hydroxythioester Expired - Fee Related JP2710837B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
JP1203142A JP2710837B2 (en) 1989-08-04 1989-08-04 Method for producing optically active β-hydroxythioester

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Publication Number Publication Date
JPH0366664A JPH0366664A (en) 1991-03-22
JP2710837B2 true JP2710837B2 (en) 1998-02-10

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Country Link
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