JPH0899953A - New haloketal compound - Google Patents

New haloketal compound

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Publication number
JPH0899953A
JPH0899953A JP12315195A JP12315195A JPH0899953A JP H0899953 A JPH0899953 A JP H0899953A JP 12315195 A JP12315195 A JP 12315195A JP 12315195 A JP12315195 A JP 12315195A JP H0899953 A JPH0899953 A JP H0899953A
Authority
JP
Japan
Prior art keywords
compound
formula
acid
methyl
haloketal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP12315195A
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Japanese (ja)
Other versions
JP2549997B2 (en
Inventor
Hiromitsu Takeda
裕光 武田
Naoya Morifuji
直哉 森藤
Toshihiro Takahashi
俊弘 高橋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Chemiphar Co Ltd
Original Assignee
Nippon Chemiphar Co Ltd
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Priority to JP7123151A priority Critical patent/JP2549997B2/en
Publication of JPH0899953A publication Critical patent/JPH0899953A/en
Application granted granted Critical
Publication of JP2549997B2 publication Critical patent/JP2549997B2/en
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Expired - Lifetime legal-status Critical Current

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

PURPOSE: To obtain the subject new compound useful as a raw material compound for dibenzothiepin derivatives useful as highly safe anti-inflammatory agents having excellent anti-inflammatory and analgesic activities. CONSTITUTION: This haloketal compound is expressed by formula I (R<1> and R<2> are each a 1-6C alkyl, pref. each methyl or ethyl; X is a halogen), e.g. methyl 5-(2-bromo-1,1-dimethoxypropyl)-2-phenylthiophenyl acetate. The compound of formula I is obtained e.g. by reacting a haloketone compound of formula II with a primary alcohol of formula, R<2> OH and an orthoformic acid ester of formula, H-(OR<2> )3 in the presence of an acid catalyst such as metal sulfonic acid or sulfuric acid under heating or heat reflux at 0 deg.C to the reflux temperature for 1/2-48h. The compound of formula II is obtained by rearrangement of the compound of formula I in the presence of a zinc halide to dorm a dicarboxylic acid ester which is then hydrolyzed into a dicarboxylic acid which is, in turn, cyclized in the presence of a condensation agent.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、医薬として有用なジベ
ンゾチエピン誘導体を製造するための原料などとして有
用な新規ハロケタール化合物に関する。
FIELD OF THE INVENTION The present invention relates to a novel haloketal compound useful as a raw material for producing a dibenzothiepine derivative useful as a medicine.

【0002】[0002]

【発明の背景】次式(〓):BACKGROUND OF THE INVENTION The following equation (〓):

【0003】[0003]

【化2】 で表わされる2−(10,11−ジヒドロ−10−オキ
ソジベンゾ[b,f]チエピン−2−イル)プロピオン
酸(本明細書では単にジベンゾチエピン誘導体という)
は、優れた抗炎症作用と鎮痛作用とを有し、安全性の高
い抗炎症剤として有用な化合物であることが知られてい
る[特開昭55−53282号公報]。ジベンゾチエピ
ン誘導体の製造法としては、上記特開昭55−5328
2号公報に、(α−シアノエチル)−6−フェニルチオ
フェニル酢酸を閉環させてジベンゾチエピンプロピオン
アミド誘導体としたのち、これを加水分解する方法が開
示されている。ジベンゾチエピン誘導体の他の製造法と
しては、ニトリル基の付いたフェニル酢酸エステルを加
水分解してジカルボン酸誘導体とした後、これを縮合剤
の存在下にて閉環させる製造法が知られている(特開昭
57−106678号公報)。なお、上記のジカルボン
酸誘導体は、ヒドロキシアセタール化合物を経由する方
法によっても得られることが既に知られている(特開昭
58−113168号公報)。
[Chemical 2] 2- (10,11-dihydro-10-oxodibenzo [b, f] thiepin-2-yl) propionic acid represented by (in the present specification, simply referred to as dibenzothiepine derivative)
Are known to have excellent anti-inflammatory and analgesic effects and are useful as highly safe anti-inflammatory agents [JP-A-55-53282]. The method for producing the dibenzothiepine derivative is described in JP-A-55-5328 described above.
Japanese Patent Publication No. 2 discloses a method in which (α-cyanoethyl) -6-phenylthiophenylacetic acid is ring-closed to give a dibenzothiepine propionamide derivative, and then this is hydrolyzed. As another manufacturing method of a dibenzothiepine derivative, a manufacturing method is known in which a phenylacetic acid ester having a nitrile group is hydrolyzed to form a dicarboxylic acid derivative, and then the ring is closed in the presence of a condensing agent. (JP-A-57-106678). It is already known that the above-mentioned dicarboxylic acid derivative can also be obtained by a method via a hydroxyacetal compound (JP-A-58-113168).

【0004】[0004]

【発明が解決しようとする課題】本発明は、ジベンゾチ
エピン誘導体などの製造に有用な新規な原料化合物を提
供することを目的とする。
SUMMARY OF THE INVENTION It is an object of the present invention to provide a novel raw material compound useful for producing a dibenzothiepine derivative or the like.

【0005】[0005]

【課題を解決するための手段】式(I):Means for Solving the Problems Formula (I):

【0006】[0006]

【化3】 (式中、R1 とR2 は互いに同一でも、異っていてもよ
い炭素数1〜6のアルキル基(メチル基もしくはエチル
基であることが好ましい)を表わし、Xはハロゲン原子
を示す)で表わされるハロケタール化合物。
[Chemical 3] (In the formula, R 1 and R 2 represent the same or different alkyl groups having 1 to 6 carbon atoms (preferably a methyl group or an ethyl group), and X represents a halogen atom) A haloketal compound represented by.

【0007】本発明の上記式(I)のハロケタール化合
物は、たとえば、まず、
The haloketal compound of the above formula (I) of the present invention is, for example,

【0008】[0008]

【化4】 (式中、R1 は前述と同じであり、Xはハロゲン原子を
示す)の式で表される公知のハロケトン化合物に、 R2 OH (式中、R2 は前述と同じである)の式で表される一級
アルコールと、 H−C(OR23 (式中、R2 は前述と同じである)の式で示されるオル
トギ酸エステルとを反応させる方法により得ることがで
きる。
[Chemical 4] (Wherein R 1 is the same as above, X represents a halogen atom), and a known halogenoke compound represented by the formula R 2 OH (wherein R 2 is the same as above) It can be obtained by a method of reacting a primary alcohol represented by with an orthoformate ester represented by the formula: H—C (OR 2 ) 3 (wherein R 2 is the same as described above).

【0009】上記のハロケトン化合物からハロケタール
化合物への反応(ケタール化反応)は、メタルスルホン
酸、p−トルエンスルホン酸、硫酸などの酸触媒の存在
下、上記ハロケトン化合物に、上記アルコールと上記オ
ルトギ酸エステルとを加え、0℃〜還流温度で1/2〜
48時間加熱または加熱還流することにより行なわれ
る。また、反応に関与しない有機溶媒(例えばベンゼ
ン、トルエン、ジクロルエタン、トリクロルエタン)を
用いても良い。本発明のハロケタール化合物は、たとえ
ば、下記の工程からなる製造法を利用することによっ
て、高い収率で容易にジベンゾチエピン誘導体に変換す
ることができる。
The reaction from the above haloketone compound to a haloketal compound (ketalization reaction) is carried out by adding the above alcohol and the above orthoformic acid to the above haloketone compound in the presence of an acid catalyst such as metal sulfonic acid, p-toluene sulfonic acid and sulfuric acid. Add ester and add 1/2 to 0 ° C to reflux temperature.
It is carried out by heating or heating under reflux for 48 hours. Further, an organic solvent which does not participate in the reaction (for example, benzene, toluene, dichloroethane, trichloroethane) may be used. The haloketal compound of the present invention can be easily converted into a dibenzothiepine derivative at a high yield by utilizing a production method including the following steps.

【0010】[製造法I]前記式(I)のハロケタール
化合物をハロゲン化亜鉛の存在下に転位させて、式
(〓):
[Production Method I] The haloketal compound of the above formula (I) is rearranged in the presence of zinc halide to give a compound of the formula (〓):

【0011】[0011]

【化5】 (式中、R1 、R2 は前記と同じ)で表わされるジカル
ボン酸エステルを得た後、これを加水分解して、式
(〓) :
[Chemical 5] (Wherein R 1 and R 2 are the same as above), a dicarboxylic acid ester is obtained, which is then hydrolyzed to give a compound of formula (〓):

【0012】[0012]

【化6】 で表わされるジカルボン酸を得て、次いでこれを縮合剤
の存在下にて閉環させることにより2−(10,11−
ジヒドロ−10−オキソジベンゾ[b,f]チエピン−
2−イル)プロピオン酸を得る方法。
[Chemical 6] 2- (10,11-) is obtained by obtaining a dicarboxylic acid represented by
Dihydro-10-oxodibenzo [b, f] thiepine-
2-yl) A method for obtaining propionic acid.

【0013】[製造法〓]上記のジカルボン酸エステル
(〓)を先に、縮合剤の存在下にて閉環させることによ
り、式(〓a):
[Production method 〓] The above dicarboxylic acid ester (〓) is first subjected to ring closure in the presence of a condensing agent to give a compound of formula (〓a):

【0014】[0014]

【化7】 で表わされる化合物を得て、次にこれを加水分解する方
法により2−(10,11−ジヒドロ−10−オキソジ
ベンゾ[b,f]チエピン−2−イル)プロピオン酸を
得る方法。なお、各式において、R1 およびR2 は、通
常は炭素数1〜6のアルキル基であるが、特にメチル基
もしくはエチル基であることが好ましい。
[Chemical 7] A method for obtaining 2- (10,11-dihydro-10-oxodibenzo [b, f] thiepin-2-yl) propionic acid by a method of obtaining a compound represented by and then hydrolyzing the compound. In addition, in each formula, R 1 and R 2 are usually an alkyl group having 1 to 6 carbon atoms, and particularly preferably a methyl group or an ethyl group.

【0015】上記の製造法I(製造法〓も同じ)の第一
工程の反応であるハロケタール化合物(I)をハロゲン
化亜鉛の存在下にて転位させてジカルボン酸エステル
(〓)とする反応(転位反応)は、トルエン、メタノー
ル、オルトギ酸メチル、ジクロルエタン、トリクロルエ
タンなどの、反応に関与しない有機溶媒の中で、ハロケ
タール(I)を、ハロゲン化亜鉛の存在下で、室温〜還
流温度にて30分〜24時間反応させることにより行な
われる。用いるハロゲン化亜鉛としては、臭化亜鉛が望
ましく、これを直接反応溶媒中に導入してもよいが、反
応系内で生成させてもよい。なお、前記のハロケトン化
合物からジカルボン酸エステル(〓)へのケタール工程
及び転位工程は、同一反応器内で中間生成物(ハロケタ
ール化合物(I))を単離することなく、同一の希釈剤
もしくは溶媒の存在下にて行なうことができる。
A reaction in which the haloketal compound (I), which is the reaction in the first step of the above-mentioned production method I (the same as the production method 〓), is rearranged in the presence of zinc halide to form a dicarboxylic acid ester (〓) ( Rearrangement reaction) is carried out at room temperature to reflux temperature in the presence of zinc halide in the presence of zinc halide in an organic solvent that does not participate in the reaction, such as toluene, methanol, methyl orthoformate, dichloroethane, and trichloroethane. It is carried out by reacting for 30 minutes to 24 hours. The zinc halide used is preferably zinc bromide, which may be directly introduced into the reaction solvent, or may be produced in the reaction system. In the ketal step and rearrangement step from the haloketone compound to the dicarboxylic acid ester (〓), the same diluent or solvent is used without isolating the intermediate product (haloketal compound (I)) in the same reactor. Can be performed in the presence of.

【0016】ジカルボン酸エステル(〓)からジカルボ
ン酸(〓)への加水分解反応は常法により行なうことが
できる。すなわち、たとえばジカルボン酸エステル
(〓)をアルカリ水溶液中にて加熱する方法などが利用
される。
The hydrolysis reaction of dicarboxylic acid ester (〓) to dicarboxylic acid (〓) can be carried out by a conventional method. That is, for example, a method of heating a dicarboxylic acid ester (〓) in an alkaline aqueous solution or the like is used.

【0017】ジカルボン酸(〓)を縮合剤の存在下にて
閉環させてジベンゾチエピン誘導体(〓)とする反応に
ついては、前記の特開昭57−106678号公報に詳
しい記載がある。すなわち、縮合剤として硫酸、ポリリ
ン酸、ポリリン酸エステルなどのような公知の縮合剤
を、ジカルボン酸(〓)に対して1〜30重量倍存在さ
せて、ジカルボン酸(〓)を室温から150℃の範囲の
温度にて10分間〜5時間程度加熱する方法が一般的に
利用される。反応終了後は、反応液を水あるいは氷水に
加えるか、あるいは逆に水あるいは氷水を反応液に加え
るような方法により生成物を析出させ、これを有機溶媒
を用いて抽出したのち、溶媒を留去する方法などが利用
される。このようにして取り出された生成物を、必要に
より再結晶などの精製操作により精製することもでき
る。
The reaction of ring-closing dicarboxylic acid (〓) in the presence of a condensing agent to give a dibenzothiepine derivative (〓) is described in detail in the above-mentioned JP-A-57-106678. That is, as a condensing agent, a known condensing agent such as sulfuric acid, polyphosphoric acid, or polyphosphoric acid ester is present in an amount of 1 to 30 times by weight with respect to the dicarboxylic acid (〓), and the dicarboxylic acid (〓) is heated from room temperature to 150 ° C. A method of heating at a temperature in the range of 10 minutes to 5 hours is generally used. After completion of the reaction, the reaction solution is added to water or ice water, or conversely water or ice water is added to the reaction solution to precipitate the product, which is extracted with an organic solvent, and then the solvent is distilled off. The method of leaving is used. The product thus taken out can be purified by a purification operation such as recrystallization if necessary.

【0018】ジカルボン酸エステル(〓)を閉環させ、
ジベンゾチエピン誘導体(〓a)とする反応は、ジカル
ボン酸(〓)を閉環させる反応と同様にして行うことが
できる。ジベンゾチエピン誘導体(〓a)の加水分解反
応は常法により行うことができる。たとえば、弱アルカ
リ性水溶液液中、あるいは酸性水溶液中で加熱する方法
が利用できる。即ち、以上のような製造法を利用するこ
とにより、本発明のハロケタール化合物から、容易に、
かつ高い収率で2−(10,11−ジヒドロ−10−オ
キソジベンゾ[b,f]チエピン−2−イル)プロピオ
ン酸を得ることができる。次に実施例と応用例とをあ
げ、本発明をさらに詳しく説明するが、もとより本発明
はこれにより何ら制限されるものではない。
The dicarboxylic acid ester (〓) is closed,
The reaction with the dibenzothiepine derivative (〓a) can be carried out in the same manner as the reaction of ring-closing the dicarboxylic acid (〓). The hydrolysis reaction of the dibenzothiepine derivative (〓a) can be carried out by a conventional method. For example, a method of heating in a weak alkaline aqueous solution or an acidic aqueous solution can be used. That is, by utilizing the above production method, from the haloketal compound of the present invention, easily,
And, 2- (10,11-dihydro-10-oxodibenzo [b, f] thiepin-2-yl) propionic acid can be obtained in high yield. Next, the present invention will be described in more detail with reference to examples and application examples, but the present invention is by no means limited thereto.

【0019】[実施例1] メチル 5−(2−ブロモ−1,1−ジメトキシプロピ
ル)−2−フェニルチオフェニルアセテートの製造
メチル 5−(2−ブロモプロピオニル)−2−フェニ
ルチオフェニルアセテート15.72g、オルトギ酸メ
チル12.7g、メタンスルホン酸0.38gおよびメ
タノール(40mL)の混合物を24時間還流したの
ち、減圧下にて濃縮した。残留物にエーテル(100m
L)を加え、飽和炭酸水素ナトリウム水溶液(20m
L)、水(20mL)、および飽和食塩水(20mL)
で洗浄したのち、無水硫酸ナトリウムで乾燥した。次い
で、溶媒を留去することにより無色の油状物を得た。こ
の油状物を精製してメチル 5−(2−ブロモ−1,1
−ジメトキシプロピル)−2−フェニルチオフェニルア
セテート(純度90%)を無色油状物として16.85
g得た。
Example 1 Preparation of methyl 5- (2-bromo-1,1-dimethoxypropyl) -2 -phenylthiophenylacetate
A mixture of methyl 5- (2-bromopropionyl) -2-phenylthiophenylacetate 15.72 g, methyl orthoformate 12.7 g, methanesulfonic acid 0.38 g and methanol (40 mL) was refluxed for 24 hours and then under reduced pressure. Concentrated. Ether (100m) in the residue
L) was added, and saturated aqueous sodium hydrogen carbonate solution (20 m
L), water (20 mL), and saturated saline (20 mL)
It was washed with and dried over anhydrous sodium sulfate. Then, the solvent was distilled off to obtain a colorless oily substance. The oil was purified to give methyl 5- (2-bromo-1,1
-Dimethoxypropyl) -2-phenylthiophenylacetate (purity 90%) as colorless oil 16.85
g was obtained.

【0020】NMR(CDCl3 )δ: 1.52(3H,d,J=8Hz) 3.21(3H,s) 3.35(3H,s) 3.61(3H,s) 3.87(2H,s) 4.45(1H,q,J=8Hz) 7.1〜7.5(8H,m)NMR (CDCl 3 ) δ: 1.52 (3H, d, J = 8 Hz) 3.21 (3H, s) 3.35 (3H, s) 3.61 (3H, s) 3.87 ( 2H, s) 4.45 (1H, q, J = 8Hz) 7.1-7.5 (8H, m)

【0021】[応用例1] (1)メチル 5−(1−メトキシカルボニルエチル)
−2−フェニルチオフェニルアセテートの製造 実施例1で得たメチル 5−(2−ブロモ−1,1−ジ
メトキシプロピル)−2−フェニルチオフェニルアセテ
ート[ハロケタール化合物]に、トルエン(38mL)
と臭化亜鉛0.86gとを加え、1時間加熱還流した。
冷却後、エーテル(100mL)を加え、水(30m
L)及び飽和食塩水(30mL)で洗浄した後、無水硫
酸ナトリウムで乾燥した。次いで、溶媒を留去した後、
減圧蒸留することにより、標題の化合物(ジカルボン酸
エステル)を黄色油状物として10.61g得た(収率
77%、沸点:212〜215℃/2mmHg)。
[Application Example 1] (1) Methyl 5- (1-methoxycarbonylethyl)
Production of 2 -phenylthiophenylacetate Methyl 5- (2-bromo-1,1-dimethoxypropyl) -2-phenylthiophenylacetate [haloketal compound] obtained in Example 1 was added to toluene (38 mL).
And zinc bromide 0.86 g were added, and the mixture was heated under reflux for 1 hour.
After cooling, ether (100 mL) was added, and water (30 m
L) and saturated brine (30 mL), and then dried over anhydrous sodium sulfate. Then, after distilling off the solvent,
By distillation under reduced pressure, 10.61 g of the title compound (dicarboxylic acid ester) was obtained as a yellow oily substance (yield 77%, boiling point: 212 to 215 ° C./2 mmHg).

【0022】NMR(CDCl3 )δ: 1.49(3H,d,J=7Hz) 3.61(3H,s) 3.67(3H,s) 3.82(2H,s) 3.5〜3.9(1H,m) 7.0〜7.4(8H,m)NMR (CDCl 3 ) δ: 1.49 (3H, d, J = 7 Hz) 3.61 (3H, s) 3.67 (3H, s) 3.82 (2H, s) 3.5- 3.9 (1H, m) 7.0-7.4 (8H, m)

【0023】(2)5−(1−カルボキシエチル)−2
−フェニルチオフェニル酢酸の製造 上記(1)で得たメチル 5−(1−メトキシカルボニ
ルエチル)−2−フェニルチオフェニルアセテート[ジ
カルボン酸エステル]17.2gに2N水酸化ナトリウ
ム水溶液(125mL)を加え、撹拌下にて4時間加熱
還流した。これを冷却した後、反応混合物を10%硫酸
でpH1に調整し、次いで塩化メチレン(150mL×
2)で抽出した。有機層を飽和食塩水(80mL)で洗
浄したのち、無水硫酸ナトリウムで乾燥した。次に、乾
燥物を減圧下にて濃縮乾固することにより淡褐色の粗結
晶を得た。この粗結晶を1,2−ジクロロエタン(30
mL)から再結晶して5−(1−カルボキシエチル)−
2−フェニルチオフェニル酢酸14.0gを微黄色結晶
として得た(収率89%)。融点:145〜146℃。
(2) 5- (1-carboxyethyl) -2
- phenyl thiophenyl methyl 5- (1-methoxycarbonylethyl) produced was obtained in the above (1) in acetic acid-2-phenylthio phenylacetate [dicarboxylic acid ester] 2N sodium hydroxide aqueous solution 17.2 g (125 mL) was added The mixture was heated under reflux for 4 hours with stirring. After cooling it, the reaction mixture was adjusted to pH 1 with 10% sulfuric acid, then methylene chloride (150 mL x
Extracted in 2). The organic layer was washed with saturated saline (80 mL) and then dried over anhydrous sodium sulfate. Next, the dried product was concentrated to dryness under reduced pressure to obtain crude crystals of light brown color. The crude crystals were mixed with 1,2-dichloroethane (30
recrystallized from 5- (1-carboxyethyl)-
2-Phenylthiophenylacetic acid (14.0 g) was obtained as pale yellow crystals (yield 89%). Melting point: 145-146 ° C.

【0024】(3)2−(10,11−ジヒドロ−10
−オキソジベンゾ[b,f]チエピン−2−イル)プロ
ピオン酸の製造 上記(2)で得られた5−(1−カルボキシエチル)−
2−フェニルチオフェニル酢酸(15.8g、0.05
モル)をポリリン酸(63g)の塩化メチレン(63m
L)溶液に加え、内温40℃で3.5時間撹拌した。反
応液に氷水を加えたのち、酢酸エチルで抽出した。抽出
物を飽和食塩水で洗浄後、無水硫酸ナトリウムで乾燥し
た。次いで乾燥物から溶媒を40℃以下で減圧留去した
のち、残留物を塩化メチレン・ヘキサンで2回再結晶し
て2−(10,11−ジヒドロ−10−オキソジベンゾ
[b,f]チエピン−2−イル)プロピオン酸の微黄色
結晶10.9gを得た(収率73%)。
(3) 2- (10,11-dihydro-10)
-Oxodibenzo [b, f] thiepin-2-yl) pro
Production of pionic acid 5- (1-carboxyethyl) -obtained in (2) above
2-Phenylthiophenylacetic acid (15.8 g, 0.05
Mol) of polyphosphoric acid (63 g) in methylene chloride (63 m)
L) The solution was added, and the mixture was stirred at an internal temperature of 40 ° C. for 3.5 hours. Ice water was added to the reaction solution, which was then extracted with ethyl acetate. The extract was washed with saturated brine and dried over anhydrous sodium sulfate. Then, the solvent was distilled off from the dried product at 40 ° C. or lower under reduced pressure, and the residue was recrystallized twice with methylene chloride / hexane to give 2- (10,11-dihydro-10-oxodibenzo [b, f] thiepine- 10.9 g of slightly yellow crystals of 2-yl) propionic acid were obtained (yield 73%).

【0025】[応用例2] (1)メチル 2−(10,11−ジヒドロ−10−オ
キソジベンゾ[b,f]チエピン−2−イル)プロピオ
ネートの製造 応用例1の(1)で得たメチル 5−(1−メトキシカ
ルボニルエチル)−2−フェニルチオフェニルアセテー
ト[ジカルボン酸エステル]0.5gとポリリン酸5.
3gとの混合物を60〜80℃に加温して約6時間撹拌
を行なった。そののち冷却し、次いで氷水を加えて過剰
のポリリン酸を分解した後、酢酸エチルを加えて、抽出
操作を行なった。有機層を取り出し、飽和食塩水、飽和
炭酸水素ナトリウム水溶液、飽和食塩水を用い順次洗浄
を行なったのち、無水硫酸ナトリウムで乾燥した。次い
で、乾燥物から溶媒を減圧留去したのち、残査をベンゼ
ン・ヘキサン混合溶媒を利用して再結晶し、メチル 2
−(10,11−ジヒドロ−10−オキソジベンゾ
[b,f]チエピン−2−イル)プロピオネート0.4
g(収率:89%、融点:81.0〜82.0℃)を得
た。
APPLICATION EXAMPLE 2 (1) Methyl 2- (10,11-dihydro-10-oxodibenzo [b, f] thiepin-2-yl) propio
4. 0.5 g of methyl 5- (1-methoxycarbonylethyl) -2-phenylthiophenylacetate [dicarboxylic acid ester] obtained in (1) of Application Example 1 and 5.
The mixture with 3 g was heated to 60 to 80 ° C. and stirred for about 6 hours. After cooling, ice water was added to decompose excess polyphosphoric acid, and ethyl acetate was added for extraction. The organic layer was taken out, washed successively with saturated saline, saturated aqueous sodium hydrogen carbonate solution and saturated saline, and then dried over anhydrous sodium sulfate. Then, the solvent was distilled off from the dried material under reduced pressure, and the residue was recrystallized using a mixed solvent of benzene and hexane to obtain methyl 2
-(10,11-Dihydro-10-oxodibenzo [b, f] thiepin-2-yl) propionate 0.4
g (yield: 89%, melting point: 81.0 to 82.0 ° C.) was obtained.

【0026】 IRνmax(neat) cm-1:1730、1670 NMR(CDCl3 )δ: 1.44(3H, d,J=8Hz,−CH3 ) 3.60(3H,s,−CO2 CH3 ) 3.66(1H,q,J=8Hz,−CH) 6.96〜7.60(5H,m,芳香族) 7.96〜8.20(1H,m,芳香族)IR ν max (neat) cm −1 : 1730, 1670 NMR (CDCl 3 ) δ: 1.44 (3H, d, J = 8 Hz, —CH 3 ) 3.60 (3H, s, —CO 2 CH 3). ) 3.66 (1H, q, J = 8Hz, -CH) 6.96 to 7.60 (5H, m, aromatic) 7.96 to 8.20 (1H, m, aromatic)

【0027】(2)2−(10,11−ジヒドロ−10
−オキソジベンゾ[b,f]チエピン−2−イル)プロ
ピオン酸の製造 上記の(1)で得たメチル 2−(10,11−ジヒド
ロ−10−オキソジベンゾ[b,f]チエピン−2−イ
ル)プロピオネート0.36g、メタノール4mL、炭
酸水素ナトリウム0.32gの水溶液3.7mL溶液を
撹拌下に約6時間加熱還流した。還流終了後に冷却した
後、これを8%炭酸水素ナトリウム水溶液20mLと塩
化メチレン10mLとともに振とうし、次いで水層を分
取した。この水層を濃塩酸で酸性となし、酢酸エチルを
用いて抽出した。酢酸エチル層を飽和食塩水で振とう洗
浄した後、無水硫酸ナトリウムで乾燥した。乾燥物から
酢酸エチルを減圧留去し、残渣約0.34gを得た。こ
れを塩化メチレン・ヘキサンで再結晶して2−(10,
11−ジヒドロ−10−オキソジベンゾ[b,f]チエ
ピン−2−イル)プロピオン酸0.31g(収率:90
%)を得た。
(2) 2- (10,11-dihydro-10)
-Oxodibenzo [b, f] thiepin-2-yl) pro
Production of pionic acid Methyl 2- (10,11-dihydro-10-oxodibenzo [b, f] thiepin-2-yl) propionate obtained in (1) above 0.36 g, methanol 4 mL, sodium hydrogencarbonate 0. A 32 mL aqueous solution of 3.7 mL was heated to reflux with stirring for about 6 hours. After the reflux was completed, the mixture was cooled, shaken with 20 mL of 8% aqueous sodium hydrogen carbonate solution and 10 mL of methylene chloride, and then the aqueous layer was separated. The aqueous layer was acidified with concentrated hydrochloric acid and extracted with ethyl acetate. The ethyl acetate layer was washed with saturated saline by shaking and then dried over anhydrous sodium sulfate. Ethyl acetate was distilled off from the dried product under reduced pressure to obtain a residue of about 0.34 g. This was recrystallized from methylene chloride / hexane to give 2- (10,
0.31 g of 11-dihydro-10-oxodibenzo [b, f] thiepin-2-yl) propionic acid (yield: 90
%) Was obtained.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 式(I): 【化1】 (式中、R1 とR2 は互いに同一でも、異っていてもよ
い炭素数1〜6のアルキル基を表わし、Xはハロゲン原
子を示す)で表わされるハロケタール化合物。
1. Formula (I): (In the formula, R 1 and R 2 represent the same or different alkyl groups having 1 to 6 carbon atoms, and X represents a halogen atom).
【請求項2】 式(I)におけるR1 およびR2 がそれ
ぞれ独立にメチル基もしくはエチル基である請求項1に
記載のハロケタール化合物。
2. The haloketal compound according to claim 1, wherein R 1 and R 2 in formula (I) are each independently a methyl group or an ethyl group.
JP7123151A 1995-04-24 1995-04-24 New haloketal compound Expired - Lifetime JP2549997B2 (en)

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Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP61134682A Division JP2612161B2 (en) 1986-06-10 1986-06-10 Method for producing dibenzothiepine derivatives

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999003827A1 (en) * 1997-07-18 1999-01-28 Nippon Suisan Kaisha, Ltd. NOVEL PROCESS FOR PRODUCING DIBENZO[b,f]THIEPINE DERIVATIVES
WO2013161842A1 (en) 2012-04-24 2013-10-31 日本ケミファ株式会社 Method for producing zaltoprofen and derivative thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999003827A1 (en) * 1997-07-18 1999-01-28 Nippon Suisan Kaisha, Ltd. NOVEL PROCESS FOR PRODUCING DIBENZO[b,f]THIEPINE DERIVATIVES
US6207837B1 (en) 1997-07-18 2001-03-27 Nippon Suisan Kaisha, Ltd. Process for producing dibenzo[b,f]thiepine derivatives
WO2013161842A1 (en) 2012-04-24 2013-10-31 日本ケミファ株式会社 Method for producing zaltoprofen and derivative thereof
KR20140132737A (en) 2012-04-24 2014-11-18 닛뽕 케미파 가부시키가이샤 Method for producing zaltoprofen and derivative thereof

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