JPH09227558A - Stable crystal of thiazole compound and its production - Google Patents

Stable crystal of thiazole compound and its production

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Publication number
JPH09227558A
JPH09227558A JP4105896A JP4105896A JPH09227558A JP H09227558 A JPH09227558 A JP H09227558A JP 4105896 A JP4105896 A JP 4105896A JP 4105896 A JP4105896 A JP 4105896A JP H09227558 A JPH09227558 A JP H09227558A
Authority
JP
Japan
Prior art keywords
thiazole
amino
pyridylsulfonyl
crystals
crystal
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.)
Pending
Application number
JP4105896A
Other languages
Japanese (ja)
Inventor
Kyoko Yamamoto
恭子 山元
Satoshi Kitamura
智 北村
Kiryo Tsuji
喜良 辻
Takashi Ogino
隆 荻野
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.)
Fujisawa Pharmaceutical Co Ltd
Original Assignee
Fujisawa Pharmaceutical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujisawa Pharmaceutical Co Ltd filed Critical Fujisawa Pharmaceutical Co Ltd
Priority to JP4105896A priority Critical patent/JPH09227558A/en
Publication of JPH09227558A publication Critical patent/JPH09227558A/en
Pending legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To obtain stable crystal of 2-amino-5-(2-pyridylsulfonyl)thiazole not to be changed by procedures such as blending, grinding, compression, heating, etc., in a pharmaceutical preparation process and not to be changed under a preservation condition at high temperature/high humidity. SOLUTION: This stable crystal of 2-amino-5-(2-pyridylsulfonyl)thiazole shows absorptions in the vicinity of wavelengths at 3,400, 3,309 and 1,651cm<-1> by an infrared absorption spectrum (paste method). Raw powder or crystal of the compound is ground and allowed to stand under a high-temperature condition to give the objective stable crystal of 2-amino-5-(2-pyridylsulfonyl)thiazole.

Description

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

【0001】[0001]

【発明の属する技術分野】この発明は血小板減少抑制作
用、殊に制癌剤などの投与による血小板の減少を抑制す
る作用を有する2−アミノ−5−(2−ピリジルスルホ
ニル)チアゾールの安定な結晶およびその製造方法に関
するものであり、医療の分野で利用される。
TECHNICAL FIELD The present invention relates to a stable crystal of 2-amino-5- (2-pyridylsulfonyl) thiazole which has an inhibitory effect on thrombocytopenia, especially an inhibitory effect on thrombocytopenia caused by administration of an anticancer agent and the like. It relates to a manufacturing method and is used in the medical field.

【0002】[0002]

【従来の技術】次の構造式:2. Description of the Related Art The following structural formula:

【化1】 で示される2−アミノ−5−(2−ピリジルスルホニ
ル)チアゾール(以下、「チアゾール化合物」というこ
とがある)は、特開平3−68567号公報に開示され
ており、それ自体公知の化合物である。この化合物は血
小板減少抑制作用、殊に制癌剤などの投与による副作用
として生じる血小板の減少を抑制するきわめて優れた作
用を有している。
Embedded image 2-amino-5- (2-pyridylsulfonyl) thiazole represented by (hereinafter sometimes referred to as "thiazole compound") is disclosed in JP-A-3-68567 and is a compound known per se. . This compound has a thrombocytopenia-suppressing action, particularly an extremely excellent action of inhibiting the reduction of platelets which is a side effect of the administration of anticancer agents.

【0003】[0003]

【発明が解決しようとする課題】上記公開公報に記載さ
れている製造方法、すなわち、2−アミノ−5−(2−
ピリジルチオ)チアゾールを3−クロロ過安息香酸と反
応させる方法によって製造されるチアゾール化合物の原
末は、錠剤などに製剤化する際、混合、粉砕、圧縮、加
熱などの操作により品質が変化したり、また、製剤の保
存中に高温・高湿度の条件下においても品質が変化する
など品質管理の面で大きな問題点があった。
DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The production method described in the above publication, namely 2-amino-5- (2-
Pyridylthio) thiazole, a bulk powder of a thiazole compound produced by a method of reacting with 3-chloroperbenzoic acid, when formulated into a tablet or the like, its quality is changed by operations such as mixing, crushing, compression and heating, In addition, there is a big problem in quality control in that the quality changes during storage of the preparation even under high temperature and high humidity conditions.

【0004】[0004]

【課題を解決するための手段】この発明の発明者らは、
チアゾール化合物に準安定形であるA形結晶と安定形で
あるB形結晶の2つの結晶多形が存在することを見出
し、A形結晶は安定形であるB形結晶に転移することを
解明した。そして、B形結晶を製剤化に用いることによ
り、上記問題点を克服できることを見い出した。
SUMMARY OF THE INVENTION The inventors of the present invention have
It was found that the thiazole compound had two polymorphs, a metastable A-type crystal and a stable B-type crystal, and it was clarified that the A-type crystal was transformed into a stable B-type crystal. . Then, they have found that the above-mentioned problems can be overcome by using the B-form crystals for formulation.

【0005】さらに、安定なB形結晶を容易にかつ高純
度・高収率で得る方法を検討した結果、 (1) チアゾール化合物の原末または結晶を粉砕した
後、温度50℃以上の条件下に放置する (2) チアゾール化合物の原末または結晶を粉砕または
加圧した後、温度50℃以上かつ相対湿度70%以上の
条件下に放置する (3) チアゾール化合物の粗結晶を含水アルコールに溶
解した後、種結晶として当該チアゾール化合物の安定結
晶を加えて冷却する ことにより、チアゾール化合物の安定な結晶形(B形結
晶)を高純度に収率良く製造できることを見い出して、
この発明を完成した。
Further, as a result of investigating a method for easily obtaining a stable B-form crystal with high purity and high yield, (1) after crushing the bulk powder or crystal of the thiazole compound, a condition of a temperature of 50 ° C. or higher (2) After crushing or pressurizing the bulk powder or crystals of the thiazole compound, and leaving it under conditions of a temperature of 50 ° C or more and a relative humidity of 70% or more (3) Crude crystals of the thiazole compound are dissolved in hydrous alcohol After that, by adding a stable crystal of the thiazole compound as a seed crystal and cooling it, it was found that a stable crystal form of the thiazole compound (B-type crystal) can be produced with high purity in good yield.
The present invention has been completed.

【0006】この発明の2−アミノ−5−(2−ピリジ
ルスルホニル)チアゾールの安定な結晶(B形結晶)
は、赤外吸収スペクトル(ペースト法)において、次に
示す波数付近に吸収を示すことを特徴とする。 3400, 3309, 1651 cm-1
Stable crystals of 2-amino-5- (2-pyridylsulfonyl) thiazole of the present invention (B type crystals)
In the infrared absorption spectrum (paste method) exhibits absorption near the wave numbers shown below. 3400, 3309, 1651 cm -1

【0007】この発明の2−アミノ−5−(2−ピリジ
ルスルホニル)チアゾールの安定な結晶は、2−アミノ
−5−(2−ピリジルスルホニル)チアゾールの原末ま
たは結晶を粉砕した後、温度50℃以上の条件下に放置
することにより得られうるものである。
The stable crystals of 2-amino-5- (2-pyridylsulfonyl) thiazole of the present invention are obtained by crushing the bulk powder or crystals of 2-amino-5- (2-pyridylsulfonyl) thiazole and then culturing at a temperature of 50. It can be obtained by leaving it under conditions of ℃ or higher.

【0008】また、この発明の2−アミノ−5−(2−
ピリジルスルホニル)チアゾールの安定な結晶は、2−
アミノ−5−(2−ピリジルスルホニル)チアゾールの
原末または結晶を粉砕または加圧した後、温度50℃以
上かつ相対湿度70%以上の条件下に放置して得られう
るものである。
Further, 2-amino-5- (2- of the present invention
A stable crystal of pyridylsulfonyl) thiazole is 2-
It can be obtained by crushing or pressurizing the bulk powder or crystals of amino-5- (2-pyridylsulfonyl) thiazole and then leaving it under conditions of a temperature of 50 ° C. or higher and a relative humidity of 70% or higher.

【0009】さらに、この発明の2−アミノ−5−(2
−ピリジルスルホニル)チアゾールの安定な結晶は、2
−アミノ−5−(2−ピリジルスルホニル)チアゾール
の粗結晶を含水アルコールに溶解した後、種結晶として
2−アミノ−5−(2−ピリジルスルホニル)チアゾー
ルの安定結晶を加え、次いで冷却することによって得ら
れうるものである。
Further, the 2-amino-5- (2
Stable crystals of -pyridylsulfonyl) thiazole are 2
By dissolving crude crystals of -amino-5- (2-pyridylsulfonyl) thiazole in hydrous alcohol, adding stable crystals of 2-amino-5- (2-pyridylsulfonyl) thiazole as seed crystals, and then cooling. It can be obtained.

【0010】この発明は、2−アミノ−5−(2−ピリ
ジルスルホニル)チアゾールの原末または結晶を粉砕し
た後、温度50℃以上の条件下に放置することを特徴と
する2−アミノ−5−(2−ピリジルスルホニル)チア
ゾールの安定な結晶の製造方法を提供する。
In the present invention, 2-amino-5- (2-pyridylsulfonyl) thiazole is prepared by pulverizing the bulk powder or crystals and then leaving it under the condition of a temperature of 50 ° C. or higher. Provided is a method for producing stable crystals of-(2-pyridylsulfonyl) thiazole.

【0011】また、この発明は、2−アミノ−5−(2
−ピリジルスルホニル)チアゾールの原末または結晶を
粉砕または加圧した後、温度50℃以上かつ相対湿度7
0%以上の条件下に放置することを特徴とする2−アミ
ノ−5−(2−ピリジルスルホニル)チアゾールの安定
な結晶の製造方法を提供する。
The present invention also provides 2-amino-5- (2
-Pyridylsulfonyl) thiazole bulk powder or crystals are crushed or pressed, and then the temperature is 50 ° C or higher and the relative humidity is 7
Provided is a method for producing a stable crystal of 2-amino-5- (2-pyridylsulfonyl) thiazole, which is characterized by leaving it under the condition of 0% or more.

【0012】さらに、この発明は2−アミノ−5−(2
−ピリジルスルホニル)チアゾールの粗結晶を含水アル
コールに溶解した後、種結晶として2−アミノ−5−
(2−ピリジルスルホニル)チアゾールの安定結晶を加
え、次いで冷却することを特徴とする2−アミノ−5−
(2−ピリジルスルホニル)チアゾールの安定な結晶の
製造方法を提供する。
Further, the present invention provides 2-amino-5- (2
After dissolving crude crystals of -pyridylsulfonyl) thiazole in hydrous alcohol, 2-amino-5-
2-amino-5-characterized in that stable crystals of (2-pyridylsulfonyl) thiazole are added and then cooled.
Provided is a method for producing stable crystals of (2-pyridylsulfonyl) thiazole.

【0013】[0013]

【発明の実施の形態】次に、上記2−アミノ−5−(2
−ピリジルスルホニル)チアゾールの安定な結晶(B形
結晶)の製造方法を詳しく説明する。 (1) この発明によるチアゾール化合物の安定結晶(B
形結晶)を得るための製造方法の一つは、まずチアゾー
ル化合物の原末または結晶を粉砕することにより行なわ
れる。使用するチアゾール化合物の原末または結晶とし
ては、先に述べた公開公報に記載の方法で得られる原末
でも、A形結晶でも良い。A形結晶はこの原末中に高い
割合で存在しており、さらに精製して用いることができ
る。粉砕にはボールミルなどを用いるのが好ましい。粉
砕に要する時間は30分以上が好ましい。次に粉砕した
原末または結晶を高温条件下、すなわち温度50℃以上
の条件下、好ましくは70℃以上の条件下に、好ましく
は9日以上放置して結晶化することにより、高収率で得
ることができる。
BEST MODE FOR CARRYING OUT THE INVENTION Next, the above 2-amino-5- (2
The method for producing a stable crystal of (pyridylsulfonyl) thiazole (form B crystal) will be described in detail. (1) Stable crystals of the thiazole compound (B
One of the production methods for obtaining shaped crystals) is carried out by first crushing the bulk powder or crystals of the thiazole compound. The bulk powder or crystal of the thiazole compound to be used may be the bulk powder obtained by the method described in the above-mentioned publication or the A-type crystal. The Form A crystal is present in a high proportion in this bulk powder, and can be further purified before use. It is preferable to use a ball mill or the like for the pulverization. The time required for crushing is preferably 30 minutes or more. Then, the crushed bulk powder or crystals are crystallized by leaving them under high temperature conditions, that is, at a temperature of 50 ° C. or higher, preferably 70 ° C. or higher, preferably for 9 days or longer to obtain a high yield. Obtainable.

【0014】(2) チアゾール化合物の安定な結晶は、
上記(1)の方法でも充分得られるが、(1)で粉砕した原末
または結晶を高温かつ高湿度の条件下、すなわち温度5
0℃以上かつ相対湿度70%以上の条件下、好ましく
は、温度70℃以上かつ相対湿度75%以上の条件下
に、好ましくは9日以上放置して結晶化することによ
り、より高収率で得ることができる。また、チアゾール
化合物の原末または結晶を粉砕せずに、単に加圧した
後、前記の温度かつ相対湿度の条件下に放置することに
よっても安定な結晶が得られる。加圧には油圧プレスな
どを用いることが好ましく、加圧条件としては0.6t
/cm2 以上の圧力で10秒間以上加圧することが好ま
しい。
(2) A stable crystal of a thiazole compound is
Although the method of (1) above can be sufficiently obtained, the bulk powder or crystals crushed in (1) are heated under high temperature and high humidity conditions, that is, at a temperature of 5
Higher yields can be obtained by crystallization under conditions of 0 ° C. or higher and relative humidity of 70% or higher, preferably 70 ° C. or higher and relative humidity of 75% or higher, preferably for 9 days or longer. Obtainable. Stable crystals can also be obtained by simply pressing the thiazole compound without crushing the powder or crystals of the thiazole compound and then leaving it under the conditions of the above temperature and relative humidity. It is preferable to use a hydraulic press or the like for pressurization, and the pressurization condition is 0.6 t.
It is preferable to pressurize at a pressure of / cm 2 or more for 10 seconds or more.

【0015】(3) この発明による安定結晶(B形結
晶)を得るための別の製造方法は、まずチアゾール化合
物の粗結晶を含水アルコールに溶解することにより行わ
れる。用いる含水アルコールとしてはメタノール、エタ
ノール、プロパノール、イソプロパノール、ブタノール
等の含水溶液が挙げられ、含水アルコールの濃度はチア
ゾール化合物が完全に溶解する濃度であればよく、一般
には例えば、エタノールの場合、30〜70%の濃度範
囲であればよい。含水アルコールの種類や濃度によりチ
アゾール化合物が完全に溶解しない場合には加温すれば
よい。ここで用いるチアゾール化合物の粗結晶は、先に
述べた(1)で例示した原末やA形結晶が挙げられる。次
に、チアゾール化合物の溶解液が加温した場合には熱い
うちに、種結晶としてチアゾール化合物のB形結晶を加
える。ここで種結晶として用いるB形結晶は、先に述べ
た(1)または(2)の製造方法により得られたB形結晶を使
用することができる。そして、自然に室温まで冷却した
後、冷蔵庫(4℃)に放置することにより結晶化してB
形結晶を得ることができる。
(3) Another production method for obtaining a stable crystal (type B crystal) according to the present invention is carried out by first dissolving a crude crystal of a thiazole compound in a hydrous alcohol. Examples of the hydrous alcohol used include aqueous solutions of methanol, ethanol, propanol, isopropanol, butanol and the like, and the concentration of the hydrous alcohol may be a concentration at which the thiazole compound is completely dissolved. It may be in the concentration range of 70%. If the thiazole compound is not completely dissolved depending on the type and concentration of the hydrous alcohol, it may be heated. Examples of the crude crystal of the thiazole compound used here include the bulk powder and the A-type crystal exemplified in (1) described above. Next, when the solution of the thiazole compound is heated, the B-form crystal of the thiazole compound is added as a seed crystal while it is hot. As the B-type crystal used as the seed crystal, the B-type crystal obtained by the above-described manufacturing method (1) or (2) can be used. Then, after naturally cooling to room temperature, it is crystallized by leaving it in a refrigerator (4 ° C.) to crystallize.
Shaped crystals can be obtained.

【0016】このようにして得られたB形結晶は次のよ
うな性質を有する。
The B-type crystal thus obtained has the following properties.

【表1】 [Table 1]

【0017】このようにして得られた2−アミノ−5−
(2−ピリジルスルホニル)チアゾールのB形結晶は安
定なため、製剤工程において混合、粉砕、圧縮、加熱な
どの操作によって変化せず、また、高温・高湿度の保存
条件においても変化しないので製剤の品質を管理する上
できわめて優れている。
2-amino-5-obtained in this way
Since the B-form crystal of (2-pyridylsulfonyl) thiazole is stable, it does not change due to operations such as mixing, crushing, compression and heating in the formulation process, and does not change even under storage conditions of high temperature and high humidity. Very good at controlling quality.

【0018】実施例1 2−アミノ−5−(2−ピリジルスルホニル)チアゾー
ルのA形結晶を、ボールミル(Spex社製)により3
0分間粉砕したのち、70℃で9日間放置して2−アミ
ノ−5−(2−ピリジルスルホニル)チアゾールの安定
結晶(B形結晶)を得た(純度83%)。 IR(ペースト法): 3400, 3309, 1651 cm-1
Example 1 A-form crystals of 2-amino-5- (2-pyridylsulfonyl) thiazole were made into 3 by a ball mill (manufactured by Spex).
After crushing for 0 minutes, the mixture was allowed to stand at 70 ° C. for 9 days to obtain a stable crystal of 2-amino-5- (2-pyridylsulfonyl) thiazole (form B crystal) (purity: 83%). IR (paste method): 3400, 3309, 1651 cm -1

【0019】実施例2 実施例1の粉砕操作により得られた結晶をガラス瓶に入
れ、栓をせずに塩化ナトリウム飽和水溶液を入れたデシ
ケーター(相対湿度:75%)中に入れて70℃で9日
間放置して、2−アミノ−5−(2−ピリジルスルホニ
ル)チアゾールのB形結晶を得た(純度95%)。 IR(ペースト法): 3400, 3309, 1651 cm-1
Example 2 The crystals obtained by the crushing operation of Example 1 were placed in a glass bottle and placed in a desiccator (relative humidity: 75%) containing a saturated aqueous solution of sodium chloride without a stopper and the mixture was placed at 70 ° C. for 9 hours. After standing for one day, B-form crystals of 2-amino-5- (2-pyridylsulfonyl) thiazole were obtained (purity 95%). IR (paste method): 3400, 3309, 1651 cm -1

【0020】実施例3 2−アミノ−5−(2−ピリジルスルホニル)チアゾー
ルのA形結晶を、赤外吸収スペクトルのKBr打錠用の
油圧プレス装置(Riken製)を用いて、0.6t/
cm2 の圧力で10秒間加圧した。次いで、実施例2と
同様にして、相対湿度75%のデシケーター中に入れて
70℃で9日間放置して、2−アミノ−5−(2−ピリ
ジルスルホニル)チアゾールのB形結晶を得た(純度2
2%)。
Example 3 A-type crystal of 2-amino-5- (2-pyridylsulfonyl) thiazole was used in an infrared absorption spectrum at a pressure of 0.6 t / m using a hydraulic press machine for tableting KBr (manufactured by Riken).
A pressure of cm 2 was applied for 10 seconds. Then, in the same manner as in Example 2, the mixture was placed in a desiccator having a relative humidity of 75% and left at 70 ° C. for 9 days to obtain a B-form crystal of 2-amino-5- (2-pyridylsulfonyl) thiazole ( Purity 2
2%).

【0021】実施例4 (1) 2−アミノ−5−(2−ピリジルチオ)チアゾー
ル(4.2g)のクロロホルム(300ml)溶液に、
3−クロロ過安息香酸(10g)のクロロホルム(70
ml)溶液を、撹拌下5℃で滴下した。混合物を室温で
16時間撹拌した。反応混合物を炭酸水素ナトリウム水
溶液で洗浄し、硫酸マグネシウムで乾燥した。溶媒を減
圧留去して、2−アミノ−5−(2−ピリジルスルホニ
ル)チアゾール(1.5g)を得た。 (2) (1)で得た2−アミノ−5−(2−ピリジルスルホ
ニル)チアゾールの粗結晶300mgを50%含水エタ
ノール4.5mlに加え、80℃に加熱して溶解した。
これに炭素粉末を加えて濾過した。濾液が熱いうちに、
実施例2で得られた2−アミノ−5−(2−ピリジルス
ルホニル)チアゾールのB形結晶15mgを加えた。自
然に室温まで冷却し、2時間放置し、次いで冷蔵庫(4
℃)に一夜放置した。沈殿物を濾取し、水洗した後、室
温で一夜風乾して淡黄白色の2−アミノ−5−(2−ピ
リジルスルホニル)チアゾールのB形結晶255mgを
得た。 融点:212〜214℃ IR(ペースト法): 3400, 3309, 1651 cm-1
Example 4 (1) A solution of 2-amino-5- (2-pyridylthio) thiazole (4.2 g) in chloroform (300 ml) was added,
3-Chloroperbenzoic acid (10 g) in chloroform (70
ml) solution was added dropwise at 5 ° C. with stirring. The mixture was stirred at room temperature for 16 hours. The reaction mixture was washed with aqueous sodium hydrogen carbonate solution and dried over magnesium sulfate. The solvent was distilled off under reduced pressure to obtain 2-amino-5- (2-pyridylsulfonyl) thiazole (1.5 g). (2) 300 mg of the crude 2-amino-5- (2-pyridylsulfonyl) thiazole crystal obtained in (1) was added to 4.5 ml of 50% water-containing ethanol, and the mixture was heated to 80 ° C. to be dissolved.
Carbon powder was added to this and filtered. While the filtrate is hot,
15 mg of Form B crystals of 2-amino-5- (2-pyridylsulfonyl) thiazole obtained in Example 2 were added. Allow to cool to room temperature, let stand for 2 hours, then fridge (4
(° C) overnight. The precipitate was collected by filtration, washed with water, and then air-dried at room temperature overnight to obtain 255 mg of pale yellowish white 2-amino-5- (2-pyridylsulfonyl) thiazole type B crystal. Melting point: 212-214 ° C IR (paste method): 3400, 3309, 1651 cm -1

Claims (7)

【特許請求の範囲】[Claims] 【請求項1】 赤外吸収スペクトル(ペースト法)にお
いて、次に示す波数付近に吸収を示すことを特徴とする
2−アミノ−5−(2−ピリジルスルホニル)チアゾー
ルの安定な結晶: 3400, 3309, 1651 cm-1
1. A stable crystal of 2-amino-5- (2-pyridylsulfonyl) thiazole which exhibits absorption in the vicinity of the following wave numbers in an infrared absorption spectrum (paste method): 3400, 3309. , 1651 cm -1
【請求項2】 2−アミノ−5−(2−ピリジルスルホ
ニル)チアゾールの原末または結晶を粉砕した後、温度
50℃以上の条件下に放置して得られうる請求項1に記
載の2−アミノ−5−(2−ピリジルスルホニル)チア
ゾールの安定な結晶。
2. The method according to claim 1, which can be obtained by crushing the bulk powder or crystals of 2-amino-5- (2-pyridylsulfonyl) thiazole and then leaving the powder at a temperature of 50 ° C. or higher. Stable crystals of amino-5- (2-pyridylsulfonyl) thiazole.
【請求項3】 2−アミノ−5−(2−ピリジルスルホ
ニル)チアゾールの原末または結晶を粉砕または加圧し
た後、温度50℃以上かつ相対湿度70%以上の条件下
に放置して得られうる請求項1に記載の2−アミノ−5
−(2−ピリジルスルホニル)チアゾールの安定な結
晶。
3. A raw material or a crystal of 2-amino-5- (2-pyridylsulfonyl) thiazole, which is obtained by crushing or pressing and then leaving it under conditions of a temperature of 50 ° C. or more and a relative humidity of 70% or more. 2-Amino-5 according to claim 1.
Stable crystals of-(2-pyridylsulfonyl) thiazole.
【請求項4】 2−アミノ−5−(2−ピリジルスルホ
ニル)チアゾールの粗結晶を含水アルコールに溶解した
後、種結晶として請求項1に記載の2−アミノ−5−
(2−ピリジルスルホニル)チアゾールの結晶を加え、
次いで冷却することによって得られうる請求項1に記載
の2−アミノ−5−(2−ピリジルスルホニル)チアゾ
ールの安定な結晶。
4. A crude product of 2-amino-5- (2-pyridylsulfonyl) thiazole is dissolved in a hydroalcohol and then used as a seed crystal of 2-amino-5-containing compound.
Add crystals of (2-pyridylsulfonyl) thiazole,
A stable crystal of 2-amino-5- (2-pyridylsulfonyl) thiazole according to claim 1, which can be obtained by subsequent cooling.
【請求項5】 2−アミノ−5−(2−ピリジルスルホ
ニル)チアゾールの原末または結晶を粉砕した後、温度
50℃以上の条件下に放置することを特徴とする請求項
1に記載の2−アミノ−5−(2−ピリジルスルホニ
ル)チアゾールの安定な結晶の製造方法。
5. The method according to claim 1, wherein the powder or crystals of 2-amino-5- (2-pyridylsulfonyl) thiazole are crushed and then allowed to stand at a temperature of 50 ° C. or higher. A process for producing stable crystals of -amino-5- (2-pyridylsulfonyl) thiazole.
【請求項6】 2−アミノ−5−(2−ピリジルスルホ
ニル)チアゾールの原末または結晶を粉砕または加圧し
た後、温度50℃以上かつ相対湿度70%以上の条件下
に放置することを特徴とする請求項1に記載の2−アミ
ノ−5−(2−ピリジルスルホニル)チアゾールの安定
な結晶の製造方法。
6. A method of crushing or compressing a bulk powder or a crystal of 2-amino-5- (2-pyridylsulfonyl) thiazole, and then leaving it under conditions of a temperature of 50 ° C. or more and a relative humidity of 70% or more. The method for producing a stable crystal of 2-amino-5- (2-pyridylsulfonyl) thiazole according to claim 1.
【請求項7】 2−アミノ−5−(2−ピリジルスルホ
ニル)チアゾールの粗結晶を含水アルコールに溶解した
後、種結晶として請求項1に記載の2−アミノ−5−
(2−ピリジルスルホニル)チアゾールの結晶を加え、
次いで冷却することを特徴とする請求項1に記載の2−
アミノ−5−(2−ピリジルスルホニル)チアゾールの
安定な結晶の製造方法。
7. A solution of 2-amino-5- (2-pyridylsulfonyl) thiazole crude crystals in a hydroalcoholic solution, and then as seed crystals, the 2-amino-5-containing compound of claim 1.
Add crystals of (2-pyridylsulfonyl) thiazole,
Then, cooling is performed.
A process for producing stable crystals of amino-5- (2-pyridylsulfonyl) thiazole.
JP4105896A 1996-02-28 1996-02-28 Stable crystal of thiazole compound and its production Pending JPH09227558A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4105896A JPH09227558A (en) 1996-02-28 1996-02-28 Stable crystal of thiazole compound and its production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4105896A JPH09227558A (en) 1996-02-28 1996-02-28 Stable crystal of thiazole compound and its production

Publications (1)

Publication Number Publication Date
JPH09227558A true JPH09227558A (en) 1997-09-02

Family

ID=12597825

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4105896A Pending JPH09227558A (en) 1996-02-28 1996-02-28 Stable crystal of thiazole compound and its production

Country Status (1)

Country Link
JP (1) JPH09227558A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002504507A (en) * 1998-02-25 2002-02-12 ジョン クロード サヴォワール Stable molded particles of crystalline organic compounds

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002504507A (en) * 1998-02-25 2002-02-12 ジョン クロード サヴォワール Stable molded particles of crystalline organic compounds
JP4885357B2 (en) * 1998-02-25 2012-02-29 スケンディ ファイナンス リミテッド Stable shaped particles of crystalline organic compounds

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