WO2016199688A1 - Method for producing carbamate compound - Google Patents

Method for producing carbamate compound Download PDF

Info

Publication number
WO2016199688A1
WO2016199688A1 PCT/JP2016/066545 JP2016066545W WO2016199688A1 WO 2016199688 A1 WO2016199688 A1 WO 2016199688A1 JP 2016066545 W JP2016066545 W JP 2016066545W WO 2016199688 A1 WO2016199688 A1 WO 2016199688A1
Authority
WO
WIPO (PCT)
Prior art keywords
formula
compound
compound represented
biphenyl
methyl
Prior art date
Application number
PCT/JP2016/066545
Other languages
French (fr)
Japanese (ja)
Inventor
林 健人
Original Assignee
住友化学株式会社
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 住友化学株式会社 filed Critical 住友化学株式会社
Priority to JP2017523613A priority Critical patent/JPWO2016199688A1/en
Priority to CN201680033390.XA priority patent/CN107635959A/en
Publication of WO2016199688A1 publication Critical patent/WO2016199688A1/en

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C269/00Preparation of derivatives of carbamic acid, i.e. compounds containing any of the groups, the nitrogen atom not being part of nitro or nitroso groups
    • C07C269/06Preparation of derivatives of carbamic acid, i.e. compounds containing any of the groups, the nitrogen atom not being part of nitro or nitroso groups by reactions not involving the formation of carbamate groups
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C271/00Derivatives of carbamic acids, i.e. compounds containing any of the groups, the nitrogen atom not being part of nitro or nitroso groups
    • C07C271/06Esters of carbamic acids
    • C07C271/08Esters of carbamic acids having oxygen atoms of carbamate groups bound to acyclic carbon atoms
    • C07C271/10Esters of carbamic acids having oxygen atoms of carbamate groups bound to acyclic carbon atoms with the nitrogen atoms of the carbamate groups bound to hydrogen atoms or to acyclic carbon atoms
    • C07C271/16Esters of carbamic acids having oxygen atoms of carbamate groups bound to acyclic carbon atoms with the nitrogen atoms of the carbamate groups bound to hydrogen atoms or to acyclic carbon atoms to carbon atoms of hydrocarbon radicals substituted by singly-bound oxygen atoms

Definitions

  • the reaction in Step 3 is a reaction of Compound D with an alkali metal borohydride.
  • the alkali metal borohydride include sodium borohydride, sodium cyanoborohydride, lithium borohydride and the like.
  • the amount of alkali metal borohydride to be used is 1 mol or more, usually 1 to 2.5 mol, relative to 1 mol of compound D.
  • Step 3 is usually performed in the presence of alcohol B in an organic solvent.
  • (2Z) -2-acetylamino-3- (biphenyl-4-yl) prop-2-enoic acid represented by the formula [VI-1] is, for example, Org. Synth ,. Coll. Vol. 2, 1 (1943 ) And can be synthesized according to the method described in (1). Whether (2Z) -2-acetylamino-3- (biphenyl-4-yl) prop-2-enoic acid represented by the formula [VI-1] is methyl esterified by the method described in Chemische Berichte 28, 3252, for example. Or an azlactone compound represented by the formula [V] described in Org. Synth., Coll. Vol.
  • the obtained mixture was added to a mixed solution of 85 mL of toluene, 8.41 g (80.7 mmol) of 35% hydrochloric acid and 37.6 mL of water, and separated at 35 ° C.
  • the obtained organic layer was washed by adding 20 mL of water.
  • the obtained organic layer was further washed with 21.2 g (14.2 mmol) of a 5.6% aqueous sodium hydrogen carbonate solution and separated, and the obtained organic layer was concentrated under reduced pressure to give tert-butyl [(2R) -1- (Biphenyl-4-yl) -3-hydroxypropan-2-yl] carbamate was obtained (total yield from Step 1 to Step 3 was 97.1%).
  • Example 9 In a 100 mL four-necked flask, 32.1 mmol (11.4 g) of methyl (2R) -3- (biphenyl-4-yl) -2-[(tert-butoxycarbonyl) amino] propanoate obtained in Example 8 was added. ), 39 mL of toluene and 7.2 mL of methanol were added, and 38.5 mmol (1.46 g) of sodium borohydride was added at 20 ° C. with stirring. After stirring at the same temperature for 3.5 hours, the reaction mixture was added to a mixed solution of 38 mL of toluene and 25.5 g (38.5 mmol) of 5.5% hydrochloric acid, and separated at 35 ° C.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Tert-Butyl[(2R)-1-(biphenyl-4-yl)-3-hydroxypropan-2-yl]carbamate can be produced by a step for obtaining a protic acid salt of a compound shown by formula [C]: by reacting a compound shown by formula [A]: with an alcohol shown by formula [B]: R3-OH [B] in the presence of a protic acid; a step for obtaining a compound shown by formula [D]: by reacting the protic acid salt of the compound shown by formula [C] obtained in the above step with tert-butyl dicarbonate in the presence of a base; and a step for reacting the compound shown by formula [D] obtained in the above step with a borohydride alkali metal salt in the presence of an alcohol.

Description

カーバメート化合物の製造方法Method for producing carbamate compounds
 本発明は、tert-ブチル[(2R)-1-(ビフェニル-4-イル)-3-ヒドロキシプロパン-2-イル]カーバメートの製造方法に関する。 The present invention relates to a method for producing tert-butyl [(2R) -1- (biphenyl-4-yl) -3-hydroxypropan-2-yl] carbamate.
 tert-ブチル[(2R)-1-(ビフェニル-4-イル)-3-ヒドロキシプロパン-2-イル]カーバメート、即ち、式:
Figure JPOXMLDOC01-appb-I000014
で示される医薬品の製造中間体として有用な化合物の製造方法が、例えばWO2013/026773号に開示されている。
tert-Butyl [(2R) -1- (biphenyl-4-yl) -3-hydroxypropan-2-yl] carbamate, ie, the formula:
Figure JPOXMLDOC01-appb-I000014
A method for producing a compound useful as an intermediate for producing a pharmaceutical represented by the formula is disclosed in, for example, WO2013 / 026773.
 本発明は、tert-ブチル[(2R)-1-(ビフェニル-4-イル)-3-ヒドロキシプロパン-2-イル]カーバメートの新たな製造方法を提供する。
本発明は以下の通りである。
[1] 下記の工程1、工程2および工程3を含む式[E]:
Figure JPOXMLDOC01-appb-I000015
The present invention provides a new process for preparing tert-butyl [(2R) -1- (biphenyl-4-yl) -3-hydroxypropan-2-yl] carbamate.
The present invention is as follows.
[1] Formula [E] including the following step 1, step 2 and step 3:
Figure JPOXMLDOC01-appb-I000015
で示される化合物(以下、化合物Eと記す。)の製造方法。
工程1 式[A]:
Figure JPOXMLDOC01-appb-I000016
A method for producing a compound represented by formula (hereinafter referred to as compound E).
Step 1 Formula [A]:
Figure JPOXMLDOC01-appb-I000016
(式中、R1は炭素数1~4のアルキル基または置換されていてもよいフェニル基を表し、R2は炭素数1~4のアルキル基表す。)
で示される化合物(以下、化合物Aと記す。)を、プロトン酸の存在下で式[B]:
3-OH  [B]
(式中、R3は炭素数1~4のアルキル基を表す。)
で示されるアルコール(以下、アルコールBと記す。)と反応させて式[C]:
Figure JPOXMLDOC01-appb-I000017
(In the formula, R 1 represents an alkyl group having 1 to 4 carbon atoms or an optionally substituted phenyl group, and R 2 represents an alkyl group having 1 to 4 carbon atoms.)
In the presence of a protonic acid (B):
R 3 —OH [B]
(Wherein R 3 represents an alkyl group having 1 to 4 carbon atoms)
And the alcohol represented by formula [C]:
Figure JPOXMLDOC01-appb-I000017
(式中、R3は前記と同じ意味を有する。)
で示される化合物(以下、化合物Cと記す。)のプロトン酸塩を得る工程;
工程2 工程1で得られた化合物Cのプロトン酸塩を塩基の存在下で二炭酸-tert-ブチル:
O[CO2C(CH332
と反応させて式[D]:
Figure JPOXMLDOC01-appb-I000018
(Wherein R 3 has the same meaning as described above.)
A step of obtaining a protonic acid salt of a compound represented by formula (hereinafter referred to as compound C);
Step 2 Protonate of compound C obtained in step 1 is tert-butyl dicarbonate in the presence of a base:
O [CO 2 C (CH 3 ) 3 ] 2
With the formula [D]:
Figure JPOXMLDOC01-appb-I000018
(式中、R3は前記と同じ意味を有する。)
で示される化合物(以下、化合物Dと記す。)を得る工程; 
工程3 工程2で得られた化合物DをアルコールBの存在下で、水素化ホウ素アルカリ金属塩と反応させて化合物Eを得る工程。
[2] R1がメチル基またはフェニル基である[1]に記載の方法。
[3] R1がメチル基でありプロトン酸が硫酸である[1]に記載の方法。
[4] 水素化ホウ素アルカリ金属塩が水素化ホウ素ナトリウムである[1]、[2]または[3]に記載の方法。
[5] 式:
Figure JPOXMLDOC01-appb-I000019
(Wherein R 3 has the same meaning as described above.)
A step of obtaining a compound represented by formula (hereinafter referred to as compound D);
Step 3 A step of obtaining Compound E by reacting Compound D obtained in Step 2 with an alkali metal borohydride in the presence of alcohol B.
[2] The method according to [1], wherein R 1 is a methyl group or a phenyl group.
[3] The method according to [1], wherein R 1 is a methyl group and the protonic acid is sulfuric acid.
[4] The method according to [1], [2] or [3], wherein the alkali metal borohydride is sodium borohydride.
[5] Formula:
Figure JPOXMLDOC01-appb-I000019
で示される化合物を、プロトン酸の存在下でメタノールと反応させて式:
Figure JPOXMLDOC01-appb-I000020
Is reacted with methanol in the presence of a protonic acid to give the formula:
Figure JPOXMLDOC01-appb-I000020
で示される化合物のプロトン酸塩を得る工程;
 前記工程で得られた式:
Figure JPOXMLDOC01-appb-I000021
Obtaining a protonic acid salt of the compound represented by:
Formula obtained in the above process:
Figure JPOXMLDOC01-appb-I000021
で示される化合物のプロトン酸塩を塩基の存在下で二炭酸-tert-ブチルと反応させて式:
Figure JPOXMLDOC01-appb-I000022
Is reacted with di-tert-butyl dicarbonate in the presence of a base to give a compound of formula
Figure JPOXMLDOC01-appb-I000022
で示される化合物を得る工程;および
 前記工程で得られた式:
Figure JPOXMLDOC01-appb-I000023
A step of obtaining a compound represented by: and the formula obtained in the step:
Figure JPOXMLDOC01-appb-I000023
で示される化合物をメタノールの存在下で、水素化ホウ素ナトリウムと反応させることによる、tert-ブチル[(2R)-1-(ビフェニル-4-イル)-3-ヒドロキシプロパン-2-イル]カーバメートの製造方法。
[6] プロトン酸が硫酸である[5]に記載の方法。
[7] メチル(2R)-2-アミノ-3-(ビフェニル-4-イル)プロパノエート1/2硫酸塩。
[8] メチル(2R)-2-アミノ-3-(ビフェニル-4-イル)プロパノエートメタンスルホン酸塩
[9] 下記の工程1、工程2および工程3を有する式[E1]:
Figure JPOXMLDOC01-appb-I000024
Of tert-butyl [(2R) -1- (biphenyl-4-yl) -3-hydroxypropan-2-yl] carbamate by reacting the compound of formula (1) with sodium borohydride in the presence of methanol. Production method.
[6] The method according to [5], wherein the protic acid is sulfuric acid.
[7] Methyl (2R) -2-amino-3- (biphenyl-4-yl) propanoate 1/2 sulfate.
[8] Methyl (2R) -2-amino-3- (biphenyl-4-yl) propanoate methanesulfonate [9] Formula [E1] having Step 1, Step 2 and Step 3 below:
Figure JPOXMLDOC01-appb-I000024
で示される化合物の製造方法。
工程1 式[A1]:
Figure JPOXMLDOC01-appb-I000025
The manufacturing method of the compound shown by these.
Step 1 Formula [A1]:
Figure JPOXMLDOC01-appb-I000025
(式中、R11はメチル基またはフェニル基を表す。)
で示される化合物を、硫酸の存在下でメタノールと反応させて式[C1]:
Figure JPOXMLDOC01-appb-I000026
(In the formula, R 11 represents a methyl group or a phenyl group.)
Is reacted with methanol in the presence of sulfuric acid to give a compound of formula [C1]:
Figure JPOXMLDOC01-appb-I000026
で示される化合物の硫酸塩を得る工程;
工程2 工程1で得られた式[C1]で示される化合物の硫酸塩を塩基の存在下で二炭酸-tert-ブチルと反応させて式[D1]:
Figure JPOXMLDOC01-appb-I000027
Obtaining a sulfate of the compound represented by:
Step 2 The sulfate of the compound represented by the formula [C1] obtained in the step 1 is reacted with tert-butyl dicarbonate in the presence of a base to obtain the formula [D1]:
Figure JPOXMLDOC01-appb-I000027
で示される化合物を得る工程;
工程3 工程2で得られた式[D1]で示される化合物をメタノールの存在下で、水素化ホウ素アルカリ金属塩と反応させて式[E1]で示される化合物を得る工程。
[10] プロトン酸が硫酸である[9]に記載の方法。
Obtaining a compound represented by:
Step 3 A step of reacting the compound represented by the formula [D1] obtained in Step 2 with an alkali metal borohydride in the presence of methanol to obtain a compound represented by the formula [E1].
[10] The method according to [9], wherein the protic acid is sulfuric acid.
 本発明は化合物Aを出発原料とし、工程1、工程2および工程3を含む方法により、化合物Eを効率よく製造する方法である。
本発明において、R1、R2およびR3で表される炭素数1~4のアルキル基としては例えばメチル基、エチル基、プロピル基、イソプロピル基、ブチル基、sec-ブチル基が挙げられ、R1で表される置換されていてもよいフェニル基としては例えばフェニル基、4-メトキシフェニル基、2-クロロフェニル基が挙げられる。
本発明においてR1で示される基はメチル基またはフェニル基が好ましい。
工程1の反応は、化合物Aをプロトン酸の存在下でアルコールBと反応させるものである。工程1におけるプロトン酸としては、塩化水素、臭化水素等のハロゲン化水素、硫酸、並びに燐酸等の無機酸や、メタンスルホン酸等の有機酸が挙げられる。工程1におけるプロトン酸は、直接反応系に加えてもよい。プロトン酸がハロゲン化水素である場合、反応系内で発生させてもよく、塩化チオニル、塩化スルフリル、臭化チオニル、オキシ塩化リン等のハロゲン化剤とアルコールBとを反応させることにより、ハロゲン化水素を反応系内で発生させることができる。
工程1におけるアルコールBの使用量は、通常化合物Aの1重量部に対して3~20重量部であり、好ましくは5~10重量部である。
工程1におけるプロトン酸の使用量は、化合物A1モルに対して1モル以上であればよく、通常は1~10モルであり、2~5モルが好ましい。
工程1の反応は通常0~150℃の温度範囲内にて行われ、50~120℃の範囲内が好ましく、80~110℃の範囲内が更に好ましい。尚、反応温度がアルコールBの沸点以上で実施する場合は、オートクレーブ等の加圧容器を使用する。
工程1の反応時間は通常1~50時間である。
工程1の反応終了後、反応混合物よりアルコールBを留去することにより、化合物Cのプロトン酸塩を得ることができる。化合物Cのプロトン酸塩は再沈殿、晶析等の精製操作に付すこともできるが、そのまま次工程の原料として使用することもできる。
工程2の反応は、化合物Cのプロトン酸塩を塩基の存在下で二炭酸-tert-ブチルと反応させるものである。
工程2における二炭酸-tert-ブチルの使用量は、化合物Cのプロトン酸塩1モルに対して1モル以上であるが、通常は1~2モルであり、1~1.5モルが好ましい。
工程2において使用される塩基としては、トリエチルアミン、ジイソプロピルエチルアミン、ピリジン等の有機塩基、水酸化ナトリウム等の無機塩基等が挙げられる。これらの無機塩基は水溶液の形態で使用してもよい。トリエチルアミンまたは水酸化ナトリウムが好ましく用いられる。
塩基は反応系のpHが7~12になるように加えるのが好ましい。
工程2において使用される塩基は化合物Cのプロトン酸塩1モルに対して1モル以上であり、通常は1~2モルである。
工程2は通常、有機溶媒中で実施される。使用される溶媒としては、ヘプタン等の脂肪族炭化水素溶媒、トルエン、キシレン、クロロベンゼン等の芳香族炭化水素溶媒、テトラヒドロフラン等のエーテル溶媒、酢酸エチル等のエステル溶媒が挙げられる。トルエンまたは酢酸エチルが好ましく用いられる。また、工程2は水を加えて行うこともできる。
工程2の反応は通常0~100℃の温度範囲内にて行われ、20~50℃の範囲内が好ましく、25~45℃の範囲内が更に好ましい。
工程2の反応時間は通常0.5~10時間である。
工程2の反応終了後、反応混合物に水を加えて分液した後、有機層を濃縮して、化合物Dを得ることができる。化合物Dは再沈殿、晶析等の精製操作に付すこともできるが、粗生成物をそのまま次工程に使用することもできる。
工程3の反応は、化合物Dを水素化ホウ素アルカリ金属塩と反応させるものである。
水素化ホウ素アルカリ金属塩としては、水素化ホウ素ナトリウム、シアノ水素化ホウ素ナトリウム、水素化ホウ素リチウム等が挙げられる。水素化ホウ素アルカリ金属塩の使用量は、化合物D1モルに対して1モル以上であり、通常は1~2.5モルである。
工程3はアルコールBの存在下で、通常、有機溶媒中で実施される。使用される溶媒としては、ヘプタン等の脂肪族炭化水素溶媒、トルエン、キシレン、クロロベンゼン等の芳香族炭化水素溶媒、およびテトラヒドロフラン等のエーテル溶媒が挙げられる。トルエンまたはテトラヒドロフランが好ましく用いられる。アルコールBの使用量は、化合物D1モルに対して通常1~10モルであり、好ましくは2~8モルである。
工程3は、例えば化合物D、アルコールBおよび有機溶媒の混合物に水素化ホウ素アルカリ金属塩を加えるか、または化合物D、有機溶媒および水素化ホウ素アルカリ金属塩の混合物にアルコールBを少量ずつ加えることにより行われる。
工程3の反応は通常0~50℃の温度範囲内にて行われ、10~30℃の範囲内が好ましい。
工程3の反応時間は通常0.5~15時間である。
工程3の反応終了後、反応混合物に塩酸などの酸性水を加えて分液した後、有機層を濃縮して、化合物Eを得ることができる。また、化合物Eを含む溶液にヘプタン、ヘキサン等の脂肪族炭化水素溶媒を加えることで、化合物Eの結晶を析出させ、結晶をろ過することにより、化合物Eを得ることができる。また、化合物Eを塩析抽出することもできる。得られた化合物Eは再結晶等により精製することができる。
化合物Aは例えば、下式:
Figure JPOXMLDOC01-appb-I000028
The present invention is a method for efficiently producing Compound E by a method comprising Step 1, Step 2 and Step 3 using Compound A as a starting material.
In the present invention, examples of the alkyl group having 1 to 4 carbon atoms represented by R 1 , R 2 and R 3 include a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, and a sec-butyl group. Examples of the optionally substituted phenyl group represented by R 1 include a phenyl group, a 4-methoxyphenyl group, and a 2-chlorophenyl group.
In the present invention, the group represented by R 1 is preferably a methyl group or a phenyl group.
The reaction in step 1 is a reaction of compound A with alcohol B in the presence of a protonic acid. Examples of the protonic acid in Step 1 include hydrogen halides such as hydrogen chloride and hydrogen bromide, inorganic acids such as sulfuric acid and phosphoric acid, and organic acids such as methanesulfonic acid. The protonic acid in step 1 may be added directly to the reaction system. When the protic acid is a hydrogen halide, it may be generated in the reaction system, and halogenated by reacting a halogenating agent such as thionyl chloride, sulfuryl chloride, thionyl bromide, phosphorus oxychloride with alcohol B. Hydrogen can be generated in the reaction system.
The amount of alcohol B used in Step 1 is usually 3 to 20 parts by weight, preferably 5 to 10 parts by weight, based on 1 part by weight of Compound A.
The amount of the protonic acid used in Step 1 may be 1 mol or more with respect to 1 mol of Compound A, usually 1 to 10 mol, preferably 2 to 5 mol.
The reaction in step 1 is usually carried out in the temperature range of 0 to 150 ° C, preferably in the range of 50 to 120 ° C, more preferably in the range of 80 to 110 ° C. When the reaction temperature is higher than the boiling point of alcohol B, a pressurized container such as an autoclave is used.
The reaction time in Step 1 is usually 1 to 50 hours.
After completion of the reaction in Step 1, the alcohol B is distilled off from the reaction mixture, whereby the protonic acid salt of Compound C can be obtained. The protonic acid salt of Compound C can be subjected to purification operations such as reprecipitation and crystallization, but can also be used as a raw material for the next step as it is.
The reaction in Step 2 is to react the protonic acid salt of Compound C with tert-butyl dicarbonate in the presence of a base.
The amount of di-tert-butyl dicarbonate used in Step 2 is 1 mol or more per 1 mol of protonic acid salt of Compound C, but usually 1 to 2 mol, preferably 1 to 1.5 mol.
Examples of the base used in Step 2 include organic bases such as triethylamine, diisopropylethylamine and pyridine, and inorganic bases such as sodium hydroxide. These inorganic bases may be used in the form of an aqueous solution. Triethylamine or sodium hydroxide is preferably used.
The base is preferably added so that the pH of the reaction system is 7-12.
The base used in Step 2 is 1 mole or more, usually 1 to 2 moles per mole of the proton salt of Compound C.
Step 2 is usually performed in an organic solvent. Examples of the solvent used include aliphatic hydrocarbon solvents such as heptane, aromatic hydrocarbon solvents such as toluene, xylene and chlorobenzene, ether solvents such as tetrahydrofuran, and ester solvents such as ethyl acetate. Toluene or ethyl acetate is preferably used. Moreover, the process 2 can also be performed by adding water.
The reaction in step 2 is usually performed within a temperature range of 0 to 100 ° C, preferably within a range of 20 to 50 ° C, and more preferably within a range of 25 to 45 ° C.
The reaction time in step 2 is usually 0.5 to 10 hours.
After completion of the reaction in Step 2, water is added to the reaction mixture for liquid separation, and then the organic layer is concentrated to obtain Compound D. Compound D can be subjected to purification operations such as reprecipitation and crystallization, but the crude product can be used in the next step as it is.
The reaction in Step 3 is a reaction of Compound D with an alkali metal borohydride.
Examples of the alkali metal borohydride include sodium borohydride, sodium cyanoborohydride, lithium borohydride and the like. The amount of alkali metal borohydride to be used is 1 mol or more, usually 1 to 2.5 mol, relative to 1 mol of compound D.
Step 3 is usually performed in the presence of alcohol B in an organic solvent. Examples of the solvent used include aliphatic hydrocarbon solvents such as heptane, aromatic hydrocarbon solvents such as toluene, xylene and chlorobenzene, and ether solvents such as tetrahydrofuran. Toluene or tetrahydrofuran is preferably used. The amount of alcohol B to be used is generally 1 to 10 mol, preferably 2 to 8 mol, per 1 mol of compound D.
Step 3 includes, for example, adding an alkali metal borohydride salt to a mixture of compound D, alcohol B, and an organic solvent, or adding alcohol B to a mixture of compound D, organic solvent, and alkali metal borohydride in small portions. Done.
The reaction in Step 3 is usually performed within a temperature range of 0 to 50 ° C., and preferably within a range of 10 to 30 ° C.
The reaction time in step 3 is usually 0.5 to 15 hours.
After completion of the reaction in Step 3, acidic water such as hydrochloric acid is added to the reaction mixture for liquid separation, and then the organic layer is concentrated to obtain Compound E. Further, compound E can be obtained by adding an aliphatic hydrocarbon solvent such as heptane or hexane to the solution containing compound E to precipitate a crystal of compound E and filtering the crystal. Moreover, the salting out extraction of the compound E can also be performed. The obtained compound E can be purified by recrystallization or the like.
Compound A is for example:
Figure JPOXMLDOC01-appb-I000028
で示される化合物を公知の方法によりエステル化することで製造することができる。
また、下記に示す方法または公知の方法に準じて製造することができる(式中、Acはアセチル基を表す)。
Figure JPOXMLDOC01-appb-I000029
It can manufacture by esterifying the compound shown by well-known method.
Moreover, it can manufacture according to the method shown below or a well-known method (In formula, Ac represents an acetyl group).
Figure JPOXMLDOC01-appb-I000029
 式[VI-1]で示される(2Z)-2-アセチルアミノ-3-(ビフェニル-4-イル)プロプ-2-エン酸は、例えばOrg. Synth,. Coll. Vol. 2, 1 (1943) に記載の方法に準じて合成することができる。式[VI-1]で示される(2Z)-2-アセチルアミノ-3-(ビフェニル-4-イル)プロプ-2-エン酸を例えばChemische Berichte 28, 3252に記載の方法でメチルエステル化するか、もしくは、Org. Synth., Coll. Vol. 2, 1 (1943) に記載の式[V]で示されるアズラクトン体を例えばJournal of Organic Chemistry (1989), 54, 4511に記載の方法に準じてメタノールと反応させることで、式[VI-2]で示されるメチル(2Z)-2-アセチルアミノ-3-(ビフェニル-4-イル)プロプ-2-エノエートを合成することができる。式[VI-1]で示される(2Z)-2-アセチルアミノ-3-(ビフェニル-4-イル)プロプ-2-エン酸もしくは式[VI-2]で示されるメチル(2Z)-2-アセチルアミノ-3-(ビフェニル-4-イル)プロプ-2-エノエートを、例えばAdvanced Synthesis & Catalysis (2003), 345(1+2), 308、Journal of Organometallic Chemistry (2003), 687(2), 494、および、特開2003-261522号公報に記載のように、光学活性ホスフィン化合物とロジウム化合物との組合せによる触媒を用いて不斉水素添加反応を行うことで、式[I-1]で示される2-(アセチルアミノ)-3-(ビフェニル-4-イル)プロパン酸および式[I-2]で示されるメチル2-(アセチルアミノ)-3-(ビフェニル-4-イル)プロパノエートを得ることができる。
 上記の操作でアセチル基およびメトキシカルボニル基を必要により適宜変更することで、化合物Aを得ることができる。
式[VI]:
(2Z) -2-acetylamino-3- (biphenyl-4-yl) prop-2-enoic acid represented by the formula [VI-1] is, for example, Org. Synth ,. Coll. Vol. 2, 1 (1943 ) And can be synthesized according to the method described in (1). Whether (2Z) -2-acetylamino-3- (biphenyl-4-yl) prop-2-enoic acid represented by the formula [VI-1] is methyl esterified by the method described in Chemische Berichte 28, 3252, for example. Or an azlactone compound represented by the formula [V] described in Org. Synth., Coll. Vol. 2, 1 (1943) according to the method described in, for example, Journal of Organic Chemistry (1989), 54, 4511. By reacting with methanol, methyl (2Z) -2-acetylamino-3- (biphenyl-4-yl) prop-2-enoate represented by the formula [VI-2] can be synthesized. (2Z) -2-acetylamino-3- (biphenyl-4-yl) prop-2-enoic acid represented by the formula [VI-1] or methyl (2Z) -2- represented by the formula [VI-2] Acetylamino-3- (biphenyl-4-yl) prop-2-enoate can be prepared, for example, by Advanced Synthesis & Catalysis (2003), 345 (1 + 2), 308, Journal of Organometallic Chemistry (2003), 687 (2), As shown in 494 and JP-A No. 2003-261522, an asymmetric hydrogenation reaction is carried out using a catalyst comprising a combination of an optically active phosphine compound and a rhodium compound. 2- (acetylamino) -3- (biphenyl-4-yl) propanoic acid and methyl 2- (acetylamino) -3- (biphenyl-4-yl) propanoate represented by the formula [I-2] Can do.
Compound A can be obtained by appropriately changing the acetyl group and the methoxycarbonyl group as necessary by the above operation.
Formula [VI]:
(式中、R1およびR2は前記と同じ意味を有する。)
で示される2-アシルアミノ-3-(ビフェニル-4-イル)プロプ-2-エン酸アルキルエステル(以下、化合物VIと記す。)は、光学活性ホスフィン化合物とロジウム化合物との組合せによる触媒の存在下に水素と反応させることにより、化合物Aに導くことができる。
(In the formula, R 1 and R 2 have the same meaning as described above.)
2-acylamino-3- (biphenyl-4-yl) prop-2-enoic acid alkyl ester (hereinafter referred to as Compound VI) is represented by the combination of an optically active phosphine compound and a rhodium compound. Can be converted to Compound A by reacting with hydrogen.
 不斉水素添加反応に用いられる光学活性ホスフィン化合物としては、1-[(R)-フェロセニル-2-(S)-エチル-1-(ジメチルアミノ)フェニル]-(R)-ホスフィノ-1’-ジシクロへキシルホスフィノフェロセン、1-[(S)-フェロセニル-2-(R)-エチル-1-(ジメチルアミノ)フェニル]-(S)-ホスフィノ-1’-ジシクロへキシルホスフィノフェロセン、(-)-1,2-ビス[(2R,5R)-2,5-ジメチルホスホラノ]ベンゼン、(+)-1,2-ビス[(2S,5S)-2,5-ジメチルホスホラノ]ベンゼン、(-)-1,2-ビス[(2R,5R)-2,5-ジエチルホスホラノ]ベンゼン、(+)-1,2-ビス[(2S,5S)-2,5-ジエチルホスホラノ]ベンゼン、(-)-1,2-ビス[(2R,5R)-2,5-ジイソプロピルホスホラノ]ベンゼン、(R,R)-2,3-ビス(tert-ブチルメチルホスフィノ)キノキサリン、(+)-1,2-ビス[(2S,5S)-2,5-ジイソプロピルホスホラノ]ベンゼン、(R)-(-)-4,12-ビス(ジフェニルホスフィノ)-[2,2]-パラシクロファン、(S)-(+)-4,12-ビス(ジフェニルホスフィノ)-[2,2]-パラシクロファン、(4R,5R)-(-)-ビス(ジフェニルホスフィノメチル)-2,2-ジメチル-1,3-ジオキソラン、(4S,5S)-(+)-ビス(ジフェニルホスフィノメチル)-2,2-ジメチル-1,3-ジオキソラン、(R,R)-1,2-ビス[(2-メトキシフェニル)(フェニルホスフィノ)]エタンおよび(S,S)-1,2-ビス[(2-メトキシフェニル)(フェニルホスフィノ)]エタンからなる群から選択される。
 不斉水素添加反応に用いられる光学活性ホスフィン化合物の使用量はロジウム化合物1モルに対して通常1~5モル、好ましくは1.01~2モルである。
 不斉水素添加反応に用いられるロジウム化合物は、例えば[Rh(nbd)2]X、[Rh(cod)2]X、[Rh(nbd)Cl]2、[Rh(cod)Cl]2が挙げられ、好ましくは[Rh(nbd)2]BF4が挙げられる。(式中、codは1,5-シクロオクタジエンを表し、nbdはノルボルナジエンを表し、Xはハロゲン原子、BF4、CF3SO3等を表す。)ロジウム化合物の使用量は化合物VIの1モルに対して、通常0.00001~0.01モル、好ましくは0.00005~0.001モルである。
不斉水素添加反応は溶媒中で行われる。溶媒としては、例えばメタノール、エタノール、2-プロパノールなどのアルコール溶媒、アセトニトリル、ジメチルホルムアミド、ジメチルスルホキシドなど極性有機溶媒、テトラヒドロフラン、ジオキサン、ジメチルエーテルなどのエーテル溶媒、ジクロロメタン、クロロホルム、1,1,1-トリクロロエタンなどのハロゲン化炭化水素溶媒、トルエン、キシレンなどの芳香族炭化水素溶媒、またはそれらの混合溶媒が挙げられ、好ましくはメタノールとテトラヒドロフランとの混合溶媒が挙げられる。
 不斉水素添加反応は、溶媒等の反応条件、還元装置であるオートクレーブの仕様等により適宜選択できるが、通常0~150℃の温度範囲内にて行われ、水素の圧力は通常0.1~20MPaの範囲内で行われる。
 反応時間は、通常1~12時間である。
 反応終了後は、反応混合物に水を加えた後、析出している結晶をろ過するか、または有機溶媒に抽出操作等の通常の後処理操作を行い、化合物Aを単離することができる。単離された化合物Aは再結晶等により精製することができる。
Examples of the optically active phosphine compound used in the asymmetric hydrogenation reaction include 1-[(R) -ferrocenyl-2- (S) -ethyl-1- (dimethylamino) phenyl]-(R) -phosphino-1′-. Dicyclohexylphosphinoferrocene, 1-[(S) -ferrocenyl-2- (R) -ethyl-1- (dimethylamino) phenyl]-(S) -phosphino-1′-dicyclohexylphosphinoferrocene, ( -)-1,2-bis [(2R, 5R) -2,5-dimethylphosphorano] benzene, (+)-1,2-bis [(2S, 5S) -2,5-dimethylphosphorano] benzene , (−)-1,2-bis [(2R, 5R) -2,5-diethylphosphorano] benzene, (+)-1,2-bis [(2S, 5S) -2,5-diethylphosphorano ] Benzene, (-)-1,2 Bis [(2R, 5R) -2,5-diisopropylphosphorano] benzene, (R, R) -2,3-bis (tert-butylmethylphosphino) quinoxaline, (+)-1,2-bis [( 2S, 5S) -2,5-diisopropylphosphorano] benzene, (R)-(−)-4,12-bis (diphenylphosphino)-[2,2] -paracyclophane, (S)-(+ ) -4,12-bis (diphenylphosphino)-[2,2] -paracyclophane, (4R, 5R)-(−)-bis (diphenylphosphinomethyl) -2,2-dimethyl-1,3 -Dioxolane, (4S, 5S)-(+)-bis (diphenylphosphinomethyl) -2,2-dimethyl-1,3-dioxolane, (R, R) -1,2-bis [(2-methoxyphenyl ) (Phenylphosphino) ] Ethane and (S, S) -1,2-bis [(2-methoxyphenyl) (phenylphosphino)] ethane.
The amount of the optically active phosphine compound used for the asymmetric hydrogenation reaction is usually 1 to 5 mol, preferably 1.01 to 2 mol, per 1 mol of the rhodium compound.
Examples of the rhodium compound used in the asymmetric hydrogenation reaction include [Rh (nbd) 2 ] X, [Rh (cod) 2 ] X, [Rh (nbd) Cl] 2 , and [Rh (cod) Cl] 2. Preferably, [Rh (nbd) 2 ] BF 4 is used. (Wherein cod represents 1,5-cyclooctadiene, nbd represents norbornadiene, X represents a halogen atom, BF 4 , CF 3 SO 3, etc.) The amount of rhodium compound used is 1 mol of compound VI. The amount is usually 0.00001 to 0.01 mol, preferably 0.00005 to 0.001 mol.
The asymmetric hydrogenation reaction is performed in a solvent. Examples of the solvent include alcohol solvents such as methanol, ethanol and 2-propanol, polar organic solvents such as acetonitrile, dimethylformamide and dimethyl sulfoxide, ether solvents such as tetrahydrofuran, dioxane and dimethyl ether, dichloromethane, chloroform and 1,1,1-trichloroethane. Halogenated hydrocarbon solvents such as, aromatic hydrocarbon solvents such as toluene and xylene, or a mixed solvent thereof, preferably a mixed solvent of methanol and tetrahydrofuran.
The asymmetric hydrogenation reaction can be appropriately selected depending on the reaction conditions such as the solvent, the specifications of the autoclave as a reduction device, etc., but is usually performed within a temperature range of 0 to 150 ° C., and the hydrogen pressure is usually 0.1 to It is performed within a range of 20 MPa.
The reaction time is usually 1 to 12 hours.
After completion of the reaction, the compound A can be isolated by adding water to the reaction mixture and then filtering the precipitated crystals, or performing an ordinary post-treatment operation such as extraction operation in an organic solvent. The isolated compound A can be purified by recrystallization or the like.
 以下、実施例により本発明をさらに詳しく説明するが、本発明はこれらの例に限定されるものではない
実施例1
 (工程1)
 300mL容量のオートクレーブ容器に、化学純度100.0%、光学純度100.0%e.e.のメチル(2R)-2-(アセチルアミノ)-3-(ビフェニル-4-イル)プロパノエート67.3mmol(20.0g)、メタノール100mL、および硫酸80.7mmol(7.91g)を入れ、100℃で15時間撹拌した。反応液を減圧下に濃縮することで、メチル(2R)-2-アミノ-3-(ビフェニル-4-イル)プロパノエート硫酸塩の結晶を得た。
EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.
(Process 1)
In a 300 mL capacity autoclave container, chemical purity 100.0%, optical purity 100.0% e.e. e. Of methyl (2R) -2- (acetylamino) -3- (biphenyl-4-yl) propanoate 67.3 mmol (20.0 g), methanol 100 mL, and sulfuric acid 80.7 mmol (7.91 g) For 15 hours. The reaction liquid was concentrated under reduced pressure to obtain methyl (2R) -2-amino-3- (biphenyl-4-yl) propanoate sulfate crystals.
 (工程2)
 前記工程1で得られたメチル(2R)-2-アミノ-3-(ビフェニル-4-イル)プロパノエート硫酸塩の結晶にトルエン140mLを加え、次いでトリエチルアミン121.1mmol(12.3g)を加えた。さらに二炭酸-tert-ブチル66.9mmol(14.6g)を25℃で滴下し、同温度で24時間撹拌した。得られた反応混合物に水100mLを加えて洗浄し、分液した。次に水40mLを有機層に加えて洗浄し、分液した。得られた有機層にトルエン135mLを加え、次いで減圧下に100mLを留去し、メチル(2R)-3-(ビフェニル-4-イル)-2-[(tert-ブトキシカルボニル)アミノ]プロパノエートのトルエン溶液を得た。
(Process 2)
To the methyl (2R) -2-amino-3- (biphenyl-4-yl) propanoate sulfate crystals obtained in Step 1, 140 mL of toluene was added, and then 121.1 mmol (12.3 g) of triethylamine was added. Further, 66.9 mmol (14.6 g) of di-tert-butyl dicarbonate was added dropwise at 25 ° C., and the mixture was stirred at the same temperature for 24 hours. The obtained reaction mixture was washed with 100 mL of water and separated. Next, 40 mL of water was added to the organic layer for washing and liquid separation. To the obtained organic layer, 135 mL of toluene was added, and then 100 mL was distilled off under reduced pressure. Toluene of methyl (2R) -3- (biphenyl-4-yl) -2-[(tert-butoxycarbonyl) amino] propanoate A solution was obtained.
 (工程3)
 前記工程2で得られたメチル(2R)-3-(ビフェニル-4-イル)-2-[(tert-ブトキシカルボニル)アミノ]プロパノエートのトルエン溶液に15℃で水素化ホウ素ナトリウム74.0mmol(2.80g)を加え、15℃でメタノール15mLを5時間かけて滴下し、13時間撹拌した。さらに15℃で水素化ホウ素ナトリウム6.7mmol(0.25g)を加えて4時間撹拌した。得られた混合物を、トルエン85mL、35%塩酸8.41g(80.7mmol)および水37.6mLの混合液の中に加え、35℃で分液した。得られた有機層に水20mLを加えて洗浄した。得られた有機層をさらに5.6%炭酸水素ナトリウム水溶液21.2g(14.2mmol)で洗浄し、分液し、得られた有機層を減圧下で濃縮し、tert-ブチル[(2R)-1-(ビフェニル-4-イル)-3-ヒドロキシプロパン-2-イル]カーバメートを得た(工程1~工程3までの通算収率97.1%)。
実施例2
 100ml容量のオートクレーブ容器に、化学純度100.0%、光学純度98.2%e.e.のメチル(2R)-2-(ベンゾイルアミノ)-3-(ビフェニル-4-イル)プロパノエート5.56mmol(2.0g)、メタノール20mL、および硫酸8.34mmol(0.82g)を入れ、100℃で56時間撹拌した。さらに硫酸5.56mmol(0.55g)を加え100℃で74時間撹拌した。得られた反応混合物を濃縮した後メタノール20mLを加え、メチル(2R)-2-アミノ-3-(ビフェニル-4-イル)プロパノエート硫酸塩を収率93.0%で得た。
実施例3
 100ml容量のテフロン(登録商標)内筒密閉容器に、化学純度100.0%、光学純度100.0%e.e.のメチル(2R)-2-(アセチルアミノ)-3-(ビフェニル-4-イル)プロパノエート3.36mmol(1.0g)、メタノール10mL、および塩化チオニル8.4mmol(1.0g)を入れ、100℃のオイルバスに浸けて24時間撹拌した。室温まで冷却後、反応液を減圧下に濃縮し、析出した結晶を取り出した。得られた結晶を冷アセトン5mLで洗浄後減圧下に乾燥し、メチル(2R)-2-アミノ-3-(ビフェニル-4-イル)プロパノエート塩酸塩2.5mmol(0.73g、収率74.4%)を得た。光学純度100.0%e.e.。
得られた結晶のNMRスペクトルを以下に示す。
1H-NMR(400MHz、DMSO-d6) ppm:
3.227(dddd、2H、J=6.8、5.6)、3.699(s、3H)、4.297(t、1H、J=6.4)、7.348-7.386(m、3H)、7.473(t、2H、J=7.6)、7.636-7.681(m、4H)、8.824(s、2H)
13C-NMR(100MHz、DMSO-d6) ppm:
35.367、52.615、53.158、126.544、126.808、127.466、128.981、130.086、133.970、139.033、139.700、169.363
実施例4
 実施例3において、塩化チオニル8.4mmolの代わりに塩化水素ガス9.6mmolを使用する以外は同様に処理し、メチル(2R)-2-アミノ-3-(ビフェニル-4-イル)プロパノエート塩酸塩を得る。生成物の光学純度は原料のメチル(2R)-2-(アセチルアミノ)-3-(ビフェニル-4-イル)プロパノエートの光学純度と同等である。
実施例5
 実施例3において、塩化チオニル8.4mmolの代わりに硫酸4.8mmolを使用する以外は同様に処理し、メチル(2R)-2-アミノ-3-(ビフェニル-4-イル)プロパノエート1/2硫酸塩3.28mmol(1.00g、収率97.7%)を得た。光学純度100.0%e.e.。
1H-NMR(400MHz、DMSO-d6) ppm:
3.160(dddd、2H、J=7.6、6.8)、3.718(s、3H)、4.356(t、1H、J=6.4)、7.327-7.388(m、3H)、7.473(t、2H、J=7.6)、7.644-7.680(m、4H)、8.465(s、2H)
実施例6
 実施例3において、塩化チオニル8.4mmolの代わりにメタンスルホン酸6.7mmolを使用する以外は同様に処理し、メチル(2R)-2-アミノ-3-(ビフェニル-4-イル)プロパノエートメタンスルホン酸塩2.54mmol(0.89g、収率75.2%)を得た。
得られた結晶のNMRスペクトルを以下に示す。
1H-NMR(400MHz、DMSO-d6) ppm:
2.417(d、3H)、3.183(dddd、2H、J=7.2、6.4)、3.715(s、3H)、4.357(br、1H)、7.340-7.393(m、3H)、7.478(t、2H、J=8.0)、7.667(m、4H)、8.531(s、2H)
13C-NMR(100MHz、DMSO-d6) ppm:
35.589、52.722、53.282、126.594、126.890、127.524、129.031、130.101、133.880、139.132、139.725、169.445
実施例7
 100ml容量のテフロン(登録商標)内筒密閉容器に、化学純度100.0%、光学純度98.2%e.e.のメチル(2R)-2-(ベンゾイルアミノ)-3-(ビフェニル-4-イル)プロパノエート2.78mmol(1.0g)、メタノール10mL、および硫酸4.0mmolを入れ、100℃のオイルバスに浸けて48時間撹拌したところ、メチル(2R)-2-アミノ-3-(ビフェニル-4-イル)プロパノエート1/2硫酸塩を収率66.3%で得た。
実施例8
 100mL容量の4ツ口フラスコに、実施例1で得られたメチル(2R)-2-アミノ-3-(ビフェニル-4-イル)プロパノエート塩酸塩1.03mmol(0.30g)、トリエチルアミン1.24mmol(0.125g)およびトルエン3.0mLを入れ、撹拌しながら二炭酸-tert-ブチル1.09mmol(0.237g)を加えた。反応混合物を30℃で3時間撹拌し、その後室温まで冷却した(LC面積百分率99.3%)。
反応混合物に水3mLを入れて洗浄し、分液した。得られた有機層を減圧下に濃縮し、メチル(2R)-3-(ビフェニル-4-イル)-2-[(tert-ブトキシカルボニル)アミノ]プロパノエート0.73mmol(0.26g、収率71%)を得た。生成物の光学純度は原料のメチル(2R)-2-アミノ-3-(ビフェニル-4-イル)プロパノエート塩酸塩の光学純度と同等であった。
実施例9
 100mL容量の4ツ口フラスコに、実施例8で得られたメチル(2R)-3-(ビフェニル-4-イル)-2-[(tert-ブトキシカルボニル)アミノ]プロパノエート32.1mmol(11.4g)、トルエン39mLおよびメタノール7.2mLを入れ、撹拌しながら20℃で水素化ホウ素ナトリウム38.5mmol(1.46g)を加えた。同温度で3.5時間撹拌した後、反応混合物を、トルエン38mLおよび5.5%塩酸25.5g(38.5mmol)の混合液の中に加え、35℃で分液した。得られた有機層に水11.4mLを加えて洗浄した。得られた有機層をさらに5.0%炭酸水素ナトリウム水溶液11.3g(6.7mmol)で洗浄し、分液し、得られた有機層を減圧下で濃縮した。濃縮残渣をトルエン98.8mLに溶解したのちにヘプタン91.7mLを加え、結晶を析出させて、析出した結晶をろ過した。得られた結晶をトルエン7.7mLとへプタン7.0mLとの混合液で洗浄したのち、減圧下に乾燥してtert-ブチル[(2R)-1-(ビフェニル-4-イル)-3-ヒドロキシプロパン-2-イル]カーバメート30.5mmol(10.0g、収率95.0%)を得た。光学純度99.2%e.e.。
実施例10
 実施例5において、メタノールの代わりにエタノールを使用する以外は同様に処理し、エチル(2R)-2-アミノ-3-(ビフェニル-4-イル)プロパノエート1/2硫酸塩2.51mmol(0.80g、収率74.8%)を得た。光学純度100.0%e.e.。
得られた結晶のNMRスペクトルを以下に示す。
1H-NMR(400MHz、DMSO-d6) ppm:
3.174(dddd、2H、J=7.2、6.0)、3.806(dd、2H、J=6.8、7.2)、4.155(m、3H)、4.347(t、1H、J=6.8)7.349-7.393(m、3H)、7.480(t、2H、J=8.0)、7.652-7.683(m、4H)、8.467(s、2H)
13C-NMR(100MHz、DMSO-d6) ppm:
13.814、15.156、35.746、53.265、61.473、61.506、61.827、126.602、126.874、127.532、129.047、130.150、133.838、139.206、139.766、169.025
実施例11
 実施例7において、メタノールの代わりにエタノールを使用する以外は同様に処理し、エチル(2R)-2-アミノ-3-(ビフェニル-4-イル)プロパノエート1/2硫酸塩収率25.7%で得た。
(Process 3)
To a toluene solution of methyl (2R) -3- (biphenyl-4-yl) -2-[(tert-butoxycarbonyl) amino] propanoate obtained in the above Step 2 at 15 ° C., 74.0 mmol (2 .80 g) was added, and 15 mL of methanol was added dropwise at 15 ° C. over 5 hours, followed by stirring for 13 hours. Furthermore, sodium borohydride 6.7mmol (0.25g) was added at 15 degreeC, and it stirred for 4 hours. The obtained mixture was added to a mixed solution of 85 mL of toluene, 8.41 g (80.7 mmol) of 35% hydrochloric acid and 37.6 mL of water, and separated at 35 ° C. The obtained organic layer was washed by adding 20 mL of water. The obtained organic layer was further washed with 21.2 g (14.2 mmol) of a 5.6% aqueous sodium hydrogen carbonate solution and separated, and the obtained organic layer was concentrated under reduced pressure to give tert-butyl [(2R) -1- (Biphenyl-4-yl) -3-hydroxypropan-2-yl] carbamate was obtained (total yield from Step 1 to Step 3 was 97.1%).
Example 2
In a 100 ml capacity autoclave container, chemical purity 100.0%, optical purity 98.2% e.e. e. Of methyl (2R) -2- (benzoylamino) -3- (biphenyl-4-yl) propanoate 5.56 mmol (2.0 g), methanol 20 mL, and sulfuric acid 8.34 mmol (0.82 g) were added at 100 ° C. And stirred for 56 hours. Furthermore, 5.56 mmol (0.55 g) of sulfuric acid was added and stirred at 100 ° C. for 74 hours. The obtained reaction mixture was concentrated and 20 mL of methanol was added to obtain methyl (2R) -2-amino-3- (biphenyl-4-yl) propanoate sulfate in a yield of 93.0%.
Example 3
In a 100 ml Teflon (registered trademark) inner sealed container, chemical purity 100.0%, optical purity 100.0% e.e. e. Of methyl (2R) -2- (acetylamino) -3- (biphenyl-4-yl) propanoate 3.36 mmol (1.0 g), methanol 10 mL, and thionyl chloride 8.4 mmol (1.0 g) It was immersed in an oil bath at 0 ° C. and stirred for 24 hours. After cooling to room temperature, the reaction solution was concentrated under reduced pressure, and the precipitated crystals were taken out. The obtained crystals were washed with 5 mL of cold acetone and dried under reduced pressure, and 2.5 mmol (0.73 g, yield 74.) of methyl (2R) -2-amino-3- (biphenyl-4-yl) propanoate hydrochloride. 4%). Optical purity 100.0% e.e. e. .
The NMR spectrum of the obtained crystal is shown below.
1 H-NMR (400 MHz, DMSO-d 6 ) ppm:
3.227 (dddd, 2H, J = 6.8, 5.6), 3.699 (s, 3H), 4.297 (t, 1H, J = 6.4), 7.348-7.386 (M, 3H), 7.473 (t, 2H, J = 7.6), 7.636-7.681 (m, 4H), 8.824 (s, 2H)
13 C-NMR (100 MHz, DMSO-d 6 ) ppm:
35.367, 52.615, 53.158, 126.544, 126.808, 127.466, 128.981, 130.086, 133.970, 139.033, 139.700, 169.363
Example 4
In Example 3, methyl (2R) -2-amino-3- (biphenyl-4-yl) propanoate hydrochloride was treated in the same manner except that 9.6 mmol of hydrogen chloride gas was used instead of 8.4 mmol of thionyl chloride. Get. The optical purity of the product is equivalent to the optical purity of the raw material methyl (2R) -2- (acetylamino) -3- (biphenyl-4-yl) propanoate.
Example 5
In Example 3, the same treatment was carried out except that 4.8 mmol of sulfuric acid was used instead of 8.4 mmol of thionyl chloride, and methyl (2R) -2-amino-3- (biphenyl-4-yl) propanoate 1/2 sulfate was used. 3.28 mmol (1.00 g, yield 97.7%) of salt was obtained. Optical purity 100.0% e.e. e. .
1 H-NMR (400 MHz, DMSO-d 6 ) ppm:
3.160 (dddd, 2H, J = 7.6, 6.8), 3.718 (s, 3H), 4.356 (t, 1H, J = 6.4), 7.327-7.388 (M, 3H), 7.473 (t, 2H, J = 7.6), 7.644-7.680 (m, 4H), 8.465 (s, 2H)
Example 6
In Example 3, methyl (2R) -2-amino-3- (biphenyl-4-yl) propanoate was treated in the same manner except that 6.7 mmol of methanesulfonic acid was used instead of 8.4 mmol of thionyl chloride. 2.54 mmol (0.89 g, yield 75.2%) of methanesulfonate was obtained.
The NMR spectrum of the obtained crystal is shown below.
1 H-NMR (400 MHz, DMSO-d 6 ) ppm:
2.417 (d, 3H), 3.183 (dddd, 2H, J = 7.2, 6.4), 3.715 (s, 3H), 4.357 (br, 1H), 7.340- 7.393 (m, 3H), 7.478 (t, 2H, J = 8.0), 7.667 (m, 4H), 8.531 (s, 2H)
13 C-NMR (100 MHz, DMSO-d 6 ) ppm:
35.589, 52.722, 53.282, 126.594, 126.890, 127.524, 129.031, 130.101, 133.880, 139.132, 139.725, 169.445
Example 7
In a 100 ml Teflon (registered trademark) inner sealed container, a chemical purity of 100.0% and an optical purity of 98.2% e.e. e. Of methyl (2R) -2- (benzoylamino) -3- (biphenyl-4-yl) propanoate 2.78 mmol (1.0 g), methanol 10 mL, and sulfuric acid 4.0 mmol were immersed in an oil bath at 100 ° C. After stirring for 48 hours, methyl (2R) -2-amino-3- (biphenyl-4-yl) propanoate 1/2 sulfate was obtained in a yield of 66.3%.
Example 8
In a four-necked flask with a capacity of 100 mL, 1.03 mmol (0.30 g) of methyl (2R) -2-amino-3- (biphenyl-4-yl) propanoate hydrochloride obtained in Example 1 and 1.24 mmol of triethylamine were obtained. (0.125 g) and 3.0 mL of toluene were added, and 1.09 mmol (0.237 g) of tert-butyl dicarbonate was added with stirring. The reaction mixture was stirred at 30 ° C. for 3 hours and then cooled to room temperature (LC area percentage 99.3%).
The reaction mixture was washed with 3 mL of water and separated. The obtained organic layer was concentrated under reduced pressure, and 0.73 mmol (0.26 g, yield 71) of methyl (2R) -3- (biphenyl-4-yl) -2-[(tert-butoxycarbonyl) amino] propanoate. %). The optical purity of the product was equivalent to the optical purity of the raw material methyl (2R) -2-amino-3- (biphenyl-4-yl) propanoate hydrochloride.
Example 9
In a 100 mL four-necked flask, 32.1 mmol (11.4 g) of methyl (2R) -3- (biphenyl-4-yl) -2-[(tert-butoxycarbonyl) amino] propanoate obtained in Example 8 was added. ), 39 mL of toluene and 7.2 mL of methanol were added, and 38.5 mmol (1.46 g) of sodium borohydride was added at 20 ° C. with stirring. After stirring at the same temperature for 3.5 hours, the reaction mixture was added to a mixed solution of 38 mL of toluene and 25.5 g (38.5 mmol) of 5.5% hydrochloric acid, and separated at 35 ° C. The obtained organic layer was washed by adding 11.4 mL of water. The obtained organic layer was further washed with 11.3 g (6.7 mmol) of 5.0% aqueous sodium hydrogen carbonate solution and separated, and the obtained organic layer was concentrated under reduced pressure. After the concentration residue was dissolved in 98.8 mL of toluene, 91.7 mL of heptane was added to precipitate crystals, and the precipitated crystals were filtered. The obtained crystals were washed with a mixed solution of 7.7 mL of toluene and 7.0 mL of heptane, and then dried under reduced pressure to give tert-butyl [(2R) -1- (biphenyl-4-yl) -3- Hydroxypropan-2-yl] carbamate 30.5 mmol (10.0 g, yield 95.0%) was obtained. Optical purity 99.2% e.e. e. .
Example 10
In Example 5, the same treatment was carried out except that ethanol was used instead of methanol, and 2.51 mmol (0. 0) of ethyl (2R) -2-amino-3- (biphenyl-4-yl) propanoate 1/2 sulfate was used. 80 g, yield 74.8%). Optical purity 100.0% e.e. e. .
The NMR spectrum of the obtained crystal is shown below.
1 H-NMR (400 MHz, DMSO-d 6 ) ppm:
3.174 (dddd, 2H, J = 7.2, 6.0), 3.806 (dd, 2H, J = 6.8, 7.2), 4.155 (m, 3H), 4.347 (T, 1H, J = 6.8) 7.349-7.393 (m, 3H), 7.480 (t, 2H, J = 8.0), 7.652-2.683 (m, 4H) ), 8.467 (s, 2H)
13 C-NMR (100 MHz, DMSO-d 6 ) ppm:
13.814, 15.156, 35.746, 53.265, 61.473, 61.506, 61.827, 126.602, 126.874, 127.532, 129.047, 130.150, 133. 838, 139.206, 139.766, 169.025
Example 11
In Example 7, the same treatment was carried out except that ethanol was used instead of methanol, and ethyl (2R) -2-amino-3- (biphenyl-4-yl) propanoate 1/2 sulfate yield was 25.7%. Got in.
 本発明により、医薬品の製造中間体として有用なtert-ブチル[(2R)-1-(ビフェニル-4-イル)-3-ヒドロキシプロパン-2-イル]カーバメートを製造することができる。 According to the present invention, tert-butyl [(2R) -1- (biphenyl-4-yl) -3-hydroxypropan-2-yl] carbamate useful as a pharmaceutical intermediate can be produced.

Claims (10)

  1.  下記の工程1、工程2および工程3を有する式[E]:
    Figure JPOXMLDOC01-appb-I000001
    で示される化合物の製造方法。
    工程1 式[A]:
    Figure JPOXMLDOC01-appb-I000002
    (式中、R1は炭素数1~4のアルキル基または置換されていてもよいフェニル基を表し、R2は炭素数1~4のアルキル基を表す。)
    で示される化合物を、プロトン酸の存在下で式[B]:
    3-OH  [B]
    (式中、R3は炭素数1~4のアルキル基を表す。)
    で示されるアルコールと反応させて式[C]:
    Figure JPOXMLDOC01-appb-I000003
    (式中、R3は前記と同じ意味を有する。)
    で示される化合物のプロトン酸塩を得る工程;
    工程2 工程1で得られた式[C]で示される化合物のプロトン酸塩を塩基の存在下で二炭酸-tert-ブチルと反応させて式[D]:
    Figure JPOXMLDOC01-appb-I000004
    (式中、R3は前記と同じ意味を有する。)
    で示される化合物を得る工程;
    工程3 工程2で得られた式[D]で示される化合物を式[B]で示されるアルコールの存在下で、水素化ホウ素アルカリ金属塩と反応させて式[E]で示される化合物を得る工程。
    Formula [E] having the following step 1, step 2 and step 3:
    Figure JPOXMLDOC01-appb-I000001
    The manufacturing method of the compound shown by these.
    Step 1 Formula [A]:
    Figure JPOXMLDOC01-appb-I000002
    (In the formula, R 1 represents an alkyl group having 1 to 4 carbon atoms or an optionally substituted phenyl group, and R 2 represents an alkyl group having 1 to 4 carbon atoms.)
    In the presence of a protonic acid in the presence of the formula [B]:
    R 3 —OH [B]
    (Wherein R 3 represents an alkyl group having 1 to 4 carbon atoms)
    Is reacted with an alcohol represented by the formula [C]:
    Figure JPOXMLDOC01-appb-I000003
    (Wherein R 3 has the same meaning as described above.)
    Obtaining a protonic acid salt of the compound represented by:
    Step 2 The protonic acid salt of the compound represented by the formula [C] obtained in Step 1 is reacted with tert-butyl dicarbonate in the presence of a base to obtain the formula [D]:
    Figure JPOXMLDOC01-appb-I000004
    (Wherein R 3 has the same meaning as described above.)
    Obtaining a compound represented by:
    Step 3 The compound represented by the formula [D] obtained in Step 2 is reacted with an alkali metal borohydride in the presence of an alcohol represented by the formula [B] to obtain a compound represented by the formula [E]. Process.
  2.  R1がメチル基またはフェニル基である請求項1に記載の方法。 The method according to claim 1, wherein R 1 is a methyl group or a phenyl group.
  3.  R1がメチル基でプロトン酸が硫酸である請求項1に記載の方法。 The process according to claim 1, wherein R 1 is a methyl group and the protic acid is sulfuric acid.
  4.  水素化ホウ素アルカリ金属塩が水素化ホウ素ナトリウムである請求項1、2または3に記載の方法。 The method according to claim 1, 2, or 3, wherein the alkali metal borohydride is sodium borohydride.
  5.  式:
    Figure JPOXMLDOC01-appb-I000005
    で示される化合物を、プロトン酸の存在下でメタノールと反応させて式:
    Figure JPOXMLDOC01-appb-I000006
    で示される化合物のプロトン酸塩を得る工程;
     前記工程で得られた式:
    Figure JPOXMLDOC01-appb-I000007
    で示される化合物のプロトン酸塩を塩基の存在下で二炭酸-tert-ブチルと反応させて式:
    Figure JPOXMLDOC01-appb-I000008
    で示される化合物を得る工程;及び
     前記工程で得られた式:
    Figure JPOXMLDOC01-appb-I000009
    で示される化合物をメタノールの存在下で、水素化ホウ素ナトリウムと反応させることによる、tert-ブチル[(2R)-1-(ビフェニル-4-イル)-3-ヒドロキシプロパン-2-イル]カーバメートの製造方法。
    formula:
    Figure JPOXMLDOC01-appb-I000005
    Is reacted with methanol in the presence of a protonic acid to give the formula:
    Figure JPOXMLDOC01-appb-I000006
    Obtaining a protonic acid salt of the compound represented by:
    Formula obtained in the above process:
    Figure JPOXMLDOC01-appb-I000007
    Is reacted with di-tert-butyl dicarbonate in the presence of a base to give a compound of formula
    Figure JPOXMLDOC01-appb-I000008
    A step of obtaining a compound represented by: and the formula obtained in the step:
    Figure JPOXMLDOC01-appb-I000009
    Of tert-butyl [(2R) -1- (biphenyl-4-yl) -3-hydroxypropan-2-yl] carbamate by reacting the compound of formula (1) with sodium borohydride in the presence of methanol. Production method.
  6.  プロトン酸が硫酸である請求項5に記載の方法。 The method according to claim 5, wherein the protonic acid is sulfuric acid.
  7.  メチル(2R)-2-アミノ-3-(ビフェニル-4-イル)プロパノエート1/2硫酸塩。 Methyl (2R) -2-amino-3- (biphenyl-4-yl) propanoate 1/2 sulfate.
  8.  メチル(2R)-2-アミノ-3-(ビフェニル-4-イル)プロパノエートメタンスルホン酸塩 Methyl (2R) -2-amino-3- (biphenyl-4-yl) propanoate methanesulfonate
  9.  下記の工程1、工程2および工程3を有する式[E1]:
    Figure JPOXMLDOC01-appb-I000010
    で示される化合物の製造方法。
    工程1 式[A1]:
    Figure JPOXMLDOC01-appb-I000011
    (式中、R11はメチル基またはフェニル基を表す。)
    で示される化合物を、硫酸の存在下でメタノールと反応させて式[C1]:
    Figure JPOXMLDOC01-appb-I000012
    で示される化合物の硫酸塩を得る工程;
    工程2 工程1で得られた式[C1]で示される化合物の硫酸塩を塩基の存在下で二炭酸-tert-ブチルと反応させて式[D1]:
    Figure JPOXMLDOC01-appb-I000013
    で示される化合物を得る工程;
    工程3 工程2で得られた式[D1]で示される化合物をメタノールの存在下で、水素化ホウ素アルカリ金属塩と反応させて式[E1]で示される化合物を得る工程。
    Formula [E1] having the following step 1, step 2 and step 3:
    Figure JPOXMLDOC01-appb-I000010
    The manufacturing method of the compound shown by these.
    Step 1 Formula [A1]:
    Figure JPOXMLDOC01-appb-I000011
    (In the formula, R 11 represents a methyl group or a phenyl group.)
    Is reacted with methanol in the presence of sulfuric acid to give a compound of formula [C1]:
    Figure JPOXMLDOC01-appb-I000012
    Obtaining a sulfate of the compound represented by:
    Step 2 The sulfate of the compound represented by the formula [C1] obtained in the step 1 is reacted with tert-butyl dicarbonate in the presence of a base to obtain the formula [D1]:
    Figure JPOXMLDOC01-appb-I000013
    Obtaining a compound represented by:
    Step 3 A step of reacting the compound represented by the formula [D1] obtained in Step 2 with an alkali metal borohydride in the presence of methanol to obtain a compound represented by the formula [E1].
  10. 11がメチル基である請求項9に記載の方法。 The method according to claim 9, wherein R 11 is a methyl group.
PCT/JP2016/066545 2015-06-10 2016-06-03 Method for producing carbamate compound WO2016199688A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2017523613A JPWO2016199688A1 (en) 2015-06-10 2016-06-03 Method for producing carbamate compounds
CN201680033390.XA CN107635959A (en) 2015-06-10 2016-06-03 The manufacture method of carbamate compounds

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2015-117517 2015-06-10
JP2015117517 2015-06-10
JP2015-138438 2015-07-10
JP2015138438 2015-07-10
JP2016-070628 2016-03-31
JP2016070628 2016-03-31

Publications (1)

Publication Number Publication Date
WO2016199688A1 true WO2016199688A1 (en) 2016-12-15

Family

ID=57503217

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/066545 WO2016199688A1 (en) 2015-06-10 2016-06-03 Method for producing carbamate compound

Country Status (3)

Country Link
JP (1) JPWO2016199688A1 (en)
CN (1) CN107635959A (en)
WO (1) WO2016199688A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017098975A1 (en) * 2015-12-10 2017-06-15 住友化学株式会社 Method for producing biphenyl compound
WO2019019795A1 (en) * 2017-07-27 2019-01-31 江苏中邦制药有限公司 Method for preparing sacubitril intermediate

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000344722A (en) * 1999-06-03 2000-12-12 Kuraray Co Ltd Production of 4-hydroxymethyl-1-aminocyclopent-2-ene derivative
JP2005082524A (en) * 2003-09-08 2005-03-31 Ihara Chem Ind Co Ltd Manufacturing method of aminoalcohol derivative
JP2007511488A (en) * 2003-11-18 2007-05-10 サゾル ジャーマニー ゲーエムベーハー Process for the preparation of metal salts of trifluoromethanesulfonic acid and its use as esterification catalyst
JP2007217402A (en) * 2006-01-17 2007-08-30 Sumitomo Chemical Co Ltd Production method of optically active biphenyl alanine compound or salt thereof and ester thereof
JP2007537163A (en) * 2004-05-06 2007-12-20 サイトキネティクス・インコーポレーテッド Compounds, compositions and methods
CN101362708A (en) * 2008-09-05 2009-02-11 浙江工业大学 Synthesis method of tert-butyl-[2-(biphenyl-4-yl)-1-(hydroxymethyl)ethyl] carbamate
JP2010254622A (en) * 2009-04-24 2010-11-11 Takasago Internatl Corp 1-menthyl (3r)-3-hydroxybutanoate, method for producing the same and composition containing the same for imparting cooling sensation
JP2015500795A (en) * 2011-10-17 2015-01-08 バイオセリックス, インコーポレイテッド Substituted biarylalkylamide
WO2015037460A1 (en) * 2013-09-10 2015-03-19 住友化学株式会社 METHOD FOR PRODUCING OPTICALLY ACTIVE 3-(BIPHENYL-4-YL)-2-[(t-BUTOXYCARBONYL)AMINO]PROPAN-1-OL

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3615569A1 (en) * 1986-05-09 1987-11-12 Hoechst Ag METHOD FOR PRODUCING AMINO ACID ESTERS
DE60120881T2 (en) * 2000-04-07 2007-01-18 Samsung Electronics Co., Ltd., Suwon SULPHONAMIDES AS MATRIX METALLOPROTEINASE INHIBITORS
DE10250082A1 (en) * 2002-10-25 2004-05-13 Boehringer Ingelheim Pharma Gmbh & Co. Kg Selected CGRP antagonists, process for their preparation and their use as pharmaceuticals

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000344722A (en) * 1999-06-03 2000-12-12 Kuraray Co Ltd Production of 4-hydroxymethyl-1-aminocyclopent-2-ene derivative
JP2005082524A (en) * 2003-09-08 2005-03-31 Ihara Chem Ind Co Ltd Manufacturing method of aminoalcohol derivative
JP2007511488A (en) * 2003-11-18 2007-05-10 サゾル ジャーマニー ゲーエムベーハー Process for the preparation of metal salts of trifluoromethanesulfonic acid and its use as esterification catalyst
JP2007537163A (en) * 2004-05-06 2007-12-20 サイトキネティクス・インコーポレーテッド Compounds, compositions and methods
JP2007217402A (en) * 2006-01-17 2007-08-30 Sumitomo Chemical Co Ltd Production method of optically active biphenyl alanine compound or salt thereof and ester thereof
CN101362708A (en) * 2008-09-05 2009-02-11 浙江工业大学 Synthesis method of tert-butyl-[2-(biphenyl-4-yl)-1-(hydroxymethyl)ethyl] carbamate
JP2010254622A (en) * 2009-04-24 2010-11-11 Takasago Internatl Corp 1-menthyl (3r)-3-hydroxybutanoate, method for producing the same and composition containing the same for imparting cooling sensation
JP2015500795A (en) * 2011-10-17 2015-01-08 バイオセリックス, インコーポレイテッド Substituted biarylalkylamide
WO2015037460A1 (en) * 2013-09-10 2015-03-19 住友化学株式会社 METHOD FOR PRODUCING OPTICALLY ACTIVE 3-(BIPHENYL-4-YL)-2-[(t-BUTOXYCARBONYL)AMINO]PROPAN-1-OL

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017098975A1 (en) * 2015-12-10 2017-06-15 住友化学株式会社 Method for producing biphenyl compound
WO2019019795A1 (en) * 2017-07-27 2019-01-31 江苏中邦制药有限公司 Method for preparing sacubitril intermediate

Also Published As

Publication number Publication date
JPWO2016199688A1 (en) 2018-03-29
CN107635959A (en) 2018-01-26

Similar Documents

Publication Publication Date Title
JPWO2015037460A1 (en) Process for producing optically active 3- (biphenyl-4-yl) -2-[(t-butoxycarbonyl) amino] propan-1-ol
JP2009534385A (en) Preparation of chirally pure amino alcohol intermediates, their derivatives, and their use
KR101888392B1 (en) Manufacture of a triiodinated contrast agent
WO2016199688A1 (en) Method for producing carbamate compound
DK2958893T3 (en) Asymmetric synthesis of a substituted pyrrolidine-2-carboxamide
RU2512285C2 (en) Method of synthesising derivatives of amino-methyl tetralin
WO2007105793A1 (en) Method for nitrating isourea
ES2609020T3 (en) Procedure for creating carbon-carbon bonds from carbonyl compounds
JPWO2011001976A1 (en) Process for producing threo-3- (3,4-dihydroxyphenyl) -L-serine
JP2009242244A (en) Method for producing pyrazine derivative and intermediate of the same
JP2003335735A (en) Method for producing perfluoroisopropylanilines
KR101525493B1 (en) Process for preparation of high purity tamsulosin or salt thereof
WO2012165607A1 (en) Method for producing proline compound
JP2018505179A (en) Process for the preparation of compounds such as 3-arylbutanal useful for the synthesis of medetomidine
KR20020031381A (en) Process for the Preparation of Tricyclic Amino Alcohol Derivatives
CN111556861A (en) Preparation method of jasmonate compound
JP2012184229A (en) Process for enantioselective synthesis of landiolol
EP4103543B1 (en) Process for the synthesis of s-beflubutamid using asymmetric hydrogenation
EP1918275A1 (en) Production method of diphenylalanine - NI(II) complex
JP2006001882A (en) Method for producing o-substituted tyrosine compound
JP5205971B2 (en) Method for producing tetrahydropyran compound
JP2009508961A (en) Production method of amino acid derivatives
IL295479A (en) Preparation of s-beflubutamid by resolving 2-(4-fluoro-3-(trifluoromethyl)phenoxy)butanoic acid
EP2282991B1 (en) Method for the production of 1,4-benzothiepin-1,1-dioxide derivatives
JP2019023164A (en) Process for producing biphenyl compound

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16807395

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2017523613

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16807395

Country of ref document: EP

Kind code of ref document: A1