JP6603334B2 - エチニル誘導体 - Google Patents
エチニル誘導体 Download PDFInfo
- Publication number
- JP6603334B2 JP6603334B2 JP2017561662A JP2017561662A JP6603334B2 JP 6603334 B2 JP6603334 B2 JP 6603334B2 JP 2017561662 A JP2017561662 A JP 2017561662A JP 2017561662 A JP2017561662 A JP 2017561662A JP 6603334 B2 JP6603334 B2 JP 6603334B2
- Authority
- JP
- Japan
- Prior art keywords
- methyl
- pyridin
- compound
- formula
- diazabicyclo
- 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.)
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- CALZXDLVWVLRTP-DLBZAZTESA-N (1R,5S)-2-[5-[2-(3-fluorophenyl)ethynyl]pyridin-2-yl]-4-methyl-2,4-diazabicyclo[3.2.0]heptan-3-one Chemical compound FC=1C=C(C=CC=1)C#CC=1C=CC(=NC=1)N1[C@@H]2CC[C@@H]2N(C1=O)C CALZXDLVWVLRTP-DLBZAZTESA-N 0.000 claims description 4
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Description
[式中、
R1は、水素又はFであり;
nは、1又は2である]
で示されるエチニル誘導体又はその薬学的に許容し得る酸付加塩に関する。
(1S,5R)−2−メチル−4−(5−(フェニルエチニル)ピリジン−2−イル)−2,4−ジアザビシクロ[3.2.0]ヘプタン−3−オン
(1R,5S)−2−(5−((4−フルオロフェニル)エチニル)ピリジン−2−イル)−4−メチル−2,4−ジアザビシクロ[3.2.0]ヘプタン−3−オン
(1R,5S)−2−(5−((3−フルオロフェニル)エチニル)ピリジン−2−イル)−4−メチル−2,4−ジアザビシクロ[3.2.0]ヘプタン−3−オン、又は
(1R,5S)−2−(5−((2,5−ジフルオロフェニル)エチニル)ピリジン−2−イル)−4−メチル−2,4−ジアザビシクロ[3.2.0]ヘプタン−3−オン。
細胞内Ca2+動員アッセイ
ヒトmGlu5a受容体をコードするcDNAを安定にトランスフェクトしたモノクローナルHEK−293細胞株を生成した;mGlu5陽性アロステリックモジュレーター(PAM)を用いた試験については、低い受容体発現レベル及び低い構成的受容体活性を有する細胞株を選択して、アゴニスト活性対PAM活性の差別化を可能にした。細胞を、標準プロトコル(Freshney, 2000)に従い、1mMグルタミン、10%(vol/vol)加熱不活性化仔ウシ血清、ペニシリン/ストレプトマイシン、50μg/mLハイグロマイシン及び15μg/mLブラストサイジンを補充した、高グルコースのダルベッコ変法イーグル培地で培養した(細胞培養試薬及び抗生物質は全て、Invitrogen(Basel, Switzerland)製である)。
国際公開公報第2011128279号=参照1
結合実験については、Schlaeger及びChristensen[Cytotechnology 15:1-13 (1998)]によって記載されている手順を使用して、ヒトmGlu5a受容体をコードするcDNAを、EBNA細胞に一過性にトランスフェクトした。細胞膜ホモジェネートをアッセイ当日まで−80℃で保存した。アッセイ当日、これらを解凍し、pH7.4の結合バッファー(15mM Tris−HCl、120mM NaCl、100mM KCl、25mM CaCl2、25mM MgCl2)に再懸濁してポリトロナイズ(polytronise)し、最終アッセイ濃度を1ウェル当たり20μgのタンパク質とした。
式II:
[式中、Xは、臭素又はヨウ素から選択されるハロゲン原子である]
で示される化合物を、式III:
で示される好適なアリール−アセチレンと反応させて、式I:
[式中、置換基R1は、上記である]
で示される化合物を式Iに描写される通りの絶対立体化学を有するエナンチオピュアな形態で形成するか、又は、ラセミ形態のIIを使用して、続いてIのキラル分離によって、光学的に純粋なエナンチオマーを生成し;そして
所望であれば、得られた化合物を薬学的に許容し得る酸付加塩に変換することを含む。
[式中、このスキーム中のR1は、(R1)nによって置換されているフェニルを意味する]
[式中、このスキーム中のR1は、(R1)nによって置換されているフェニルを意味する]
[式中、IC50値は、化合物の効果の50%が拮抗される、試験化合物の濃度(μM)である。[L]は、その濃度であり、そして、EC50値は、約50%の刺激をもたらす化合物の濃度(μM)である]
(−)−(1S,5R)−2−メチル−4−(5−(フェニルエチニル)ピリジン−2−イル)−2,4−ジアザビシクロ[3.2.0]ヘプタン−3−オン
工程1:(rac)−(1SR,2RS)−2−(ナフタレン−2−イルメトキシカルボニルアミノ)シクロブタンカルボン酸メチルエステル:
1,2−ジクロロエタン160ml中の(rac)−(cis)−(1RS,2SR)−シクロブタン−1,2−ジカルボン酸モノメチルエステル(CAS:31420−52−7)(10.8g、68.3mmol)、及びN−メチルモルホリン(7.6g、8.26ml、75.1mmol)の十分に撹拌した溶液に、ジフェニルホスホリルアジド(20.7g、16.2ml、75.1mmol)を滴下した。室温で10分間撹拌した後、反応物を60℃まで温めた。2−ナフチルメチルアルコール(10.8g、68.3mmol)及び塩化銅(I)(68mg、0.68mmol)を加え、そして、反応物を60℃でさらに16時間撹拌した。反応物を真空下で濃縮し、明褐色の油性残渣(51g)をジクロロメタン15mlで希釈し、シリカゲルフラッシュクロマトグラフィー(SiO2(650g)、酢酸エチル/ヘプタン 20:80)によって精製して、未反応のナフチルメタノールを含有する不純物質16.8gを生成した。その物質を再精製(Aminophase、ヘプタン中0%〜35%酢酸エチルの勾配)して、標記化合物11.1g(52%)を白色の結晶性固体として生成した。MS: m/e = 314.2 (M+H+)。
ジオキサン20ml中の(rac)−(1SR,2RS)−2−(ナフタレン−2−イルメトキシカルボニルアミノ)シクロブタンカルボン酸メチルエステル(実施例1、工程1)(4.2g、13.4mmol)の十分に撹拌した溶液に、水(70ml)を加えた。溶液を5℃に冷却し、そして、0.5M 水酸化ナトリウム溶液53.6ml(26.8mmol)を5分間かけて滴下した。5℃で1時間撹拌した後、反応物を激しく撹拌しながら室温まで放温した。次いで、透明な溶液を5℃に冷却し、そして、2N 塩酸溶液約13mlの添加によってpHを2.5に調整した。反応物を酢酸エチルで後処理した。乾燥、濾過及び真空下での濃縮後、標記化合物3.87g(97%)を結晶性の白色固体として得た。MS: m/e = 300.2 (M+H+)。
ジクロロエタン34ml中の(rac)−(1SR,2RS)−2−(ナフタレン−2−イルメトキシカルボニルアミノ)シクロブタン−カルボン酸(実施例1、工程2)(2.34g、7.82mmol)及びN−メチルモルホリン(0.79g、0.86ml、7.82mmol)の溶液をr.t.で10分間撹拌した。次いで、ジフェニルリン酸アジド(2.15g、1.69ml、7.82mmol)を室温で滴下し、そして、無色の溶液を室温で1時間撹拌し、その間に溶液が明黄色に変化した。次いで、溶液を50℃に温め、6時間撹拌し、そして放冷した。ジクロロメタン/水で後処理した後、合わせた有機相を蒸発乾固して、黄色の固体を生成して、これを酢酸エチル/ヘプタンから再結晶した。標記化合物(1.86g、80%)を白色の結晶性固体として得た。MS: m/e = 297.3 (M+H+)。
DMF11ml中の(rac)−(1RS,5SR)−3−オキソ−2,4−ジアザ−ビシクロ[3.2.0]ヘプタン−2−カルボン酸ナフタレン−2−イルメチルエステル(実施例1、工程3)(1.13g、3.81mmol)の溶液に、鉱油中60%水素化ナトリウム懸濁液(0.198g、4.96mmol)を加えた。懸濁液を室温で35分間撹拌し(ガス発生)、次いで、ヨードメタン(0.81g、0.36ml、5.72mmol)を加え、そして、混合物を室温で一晩撹拌した。飽和塩化アンモニウム溶液3mlの添加によるクエンチ及び真空下での濃縮後、残渣を酢酸エチル/水で後処理した。合わせた有機相を乾燥させ、真空下で濃縮した。残渣を、シリカゲル(50g)フラッシュクロマトグラフィーによってヘプタン中20〜100%酢酸エチルの勾配で溶離させて精製して、無色の油状物0.98g(82%)を生成した。MS: m/e = 311.2 (M+H+)。
メタノール15ml中の(rac)−(1RS,5SR)−4−メチル−3−オキソ−2,4−ジアザ−ビシクロ[3.2.0]ヘプタン−2−カルボン酸ナフタレン−2−イルメチルエステル(実施例1、工程4)(0.97g、3.13mmol)の溶液を10%Pd/C(0.333g、0.313mmol)で48時間水素化した。溶液にアルゴンをパージし、触媒を濾別し、そして、酢酸エチルで洗浄した。濾液を真空下で濃縮した。残渣を、シリカゲル(20g)フラッシュクロマトグラフィーによってヘプタン中50〜100%酢酸エチルの勾配で溶離させて精製して、標記化合物0.375g(95%)を結晶性の白色固体として生成し、これをさらなる特性決定なしにそのまま次の工程に使用した。
DMF(10ml)中の(rac)−(1SR,5RS)−2−メチル−2,4−ジアザ−ビシクロ[3.2.0]ヘプタン−3−オン(実施例1、工程5)(375mg、2.97mmol)及び2−フルオロ−5−ヨードピリジン(683mg、3.06mmol)の溶液に、鉱油中60%水素化ナトリウム懸濁液(155mg、3.86mmol)を加えた。反応物を室温で一晩撹拌した。飽和塩化アンモニウム溶液3mlの添加によるクエンチ及び真空下での濃縮によりDMFを除去した後、残渣を酢酸エチル/水で後処理した。乾燥及び真空下での濃縮後、残渣を、ヘプタン中0%〜65%酢酸エチルの勾配を使用したフラッシュクロマトグラフィー(SiO2、20g)によって精製した。標記化合物(549mg、56%)を結晶性の白色固体として得た。MS: m/e = 330.1 (M+H+)。
5mlのマイクロ波管中、(rac)−(1RS,5SR)−2−(5−ヨード−ピリジン−2−イル)−4−メチル−2,4−ジアザ−ビシクロ[3.2.0]ヘプタン−3−オン(実施例1、工程6)110mg(0.33mmol)をDMF1.5ml中に溶解した。溶液中にアルゴンをバブリングした。エチニルベンゼン(73μl、68mg、0.67mmol)、ビス(トリフェニルホスフィン)パラジウム(II)クロリド(14mg、20μmol)、ヨウ化銅(I)(1.9mg、10.0μmol)、トリフェニルホスフィン(1.8mg、7.7μmol)及びトリエチルアミン107μl(101mg、140μl、1.0mmol)を加えた。暗褐色の溶液を60℃で3時間撹拌した。反応物を酢酸エチル/水で後処理し、乾燥させ、そして、真空下で濃縮した。残渣を、フラッシュクロマトグラフィー(シリカゲル、20g、ヘプタン中0%〜50%EtOAcの勾配)によって精製して、標記化合物95mg(94%)を明褐色の結晶性固体として生成した。MS: m/e = 304.2 (M+H+)。
(rac)−(+/−)−(1SR,5RS)−2−メチル−4−(5−(フェニルエチニル)ピリジン−2−イル)−2,4−ジアザビシクロ[3.2.0]ヘプタン−3−オンのラセミ混合物(実施例1、工程7)(95mg)をキラルHPLC:(Chiralpak AD(登録商標)−5cm×50cm、20mM;40%イソプロパノール/ヘプタン、35ml/min、18Bar)によって分離した。UV検出器並びに旋光度検出器(ORD)を使用してピーク検出を実現し、一方のピークは、負のシグナルを有し((−)−エナンチオマー)、そして、他方のピークは、正のシグナルを有していた((+)−エナンチオマー)。(−)−エナンチオマー、(−)−(1S,5R)−2−メチル−4−(5−(フェニルエチニル)ピリジン−2−イル)−2,4−ジアザビシクロ[3.2.0]ヘプタン−3−オン(39mg)を結晶性の明黄色の固体として得た。MS: m/e = 304.1 (M+H+)。(+)−エナンチオマー、(−)−(1R,5S)−2−メチル−4−(5−(フェニルエチニル)ピリジン−2−イル)−2,4−ジアザビシクロ[3.2.0]ヘプタン−3−オン(40mg)を明黄色の固体として得た。MS: m/e = 304.1 (M+H+)。
(−)−(1R,5S)−2−[5−(3−フルオロ−フェニルエチニル)−ピリジン−2−イル]−4−メチル−2,4−ジアザビシクロ[3.2.0]ヘプタン−3−オン
標記化合物を、実施例1、工程7の一般的方法に従って、(rac)−(1RS,5SR)−2−(5−ヨード−ピリジン−2−イル)−4−メチル−2,4−ジアザ−ビシクロ[3.2.0]ヘプタン−3−オン(実施例1、工程6)(110mg)及び1−エチニル−3−フルオロベンゼンから開始して調製して、ラセミ物質((+/−)−(1R,5S)−2−[5−(3−フルオロ−フェニルエチニル)−ピリジン−2−イル]−4−メチル−2,4−ジアザビシクロ[3.2.0]ヘプタン−3−オン107mg(96%)を明黄色の結晶性固体;MS: m/e = 322.3 (M+H+)として生成し、次いでこれを実施例1、工程8に記載のものと類似の分離条件を使用したキラルHPLCによって分離して、エナンチオピュアなエナンチオマー(−)−(1R,5S)−2−[5−(3−フルオロ−フェニルエチニル)−ピリジン−2−イル]−4−メチル−2,4−ジアザビシクロ[3.2.0]ヘプタン−3−オンを明黄色の固体;MS: m/e = 322.3 (M+H+)として;及びそのエナンチオマー(+)−(1S,5R)−2−[5−(3−フルオロ−フェニルエチニル)−ピリジン−2−イル]−4−メチル−2,4−ジアザビシクロ[3.2.0]ヘプタン−3−オンを明黄色の固体;MS: m/e = 322.3 (M+H+)として生成した。
(−)−(1R,5S)−2−[5−(4−フルオロ−フェニルエチニル)−ピリジン−2−イル]−4−メチル−2,4−ジアザビシクロ[3.2.0]ヘプタン−3−オン
標記化合物を、実施例1、工程7の一般的方法に従って、(rac)−(1RS,5SR)−2−(5−ヨード−ピリジン−2−イル)−4−メチル−2,4−ジアザ−ビシクロ[3.2.0]ヘプタン−3−オン(実施例1、工程6)(110mg)及び1−エチニル−4−フルオロベンゼンから開始して調製して、ラセミ物質((+/−)−(rac)−(1SR,5RS)−2−[5−(4−フルオロ−フェニルエチニル)−ピリジン−2−イル]−4−メチル−2,4−ジアザビシクロ[3.2.0]ヘプタン−3−オン104mg(97%)を明黄色の結晶性固体;MS: m/e = 322.3 (M+H+)として生成し、次いでこれを実施例1、工程8に記載のものと類似の分離条件を使用したキラルHPLCによって分離して、エナンチオピュアなエナンチオマー(−)−(1R,5S)−2−[5−(4−フルオロ−フェニルエチニル)−ピリジン−2−イル]−4−メチル−2,4−ジアザビシクロ[3.2.0]ヘプタン−3−オンを明黄色の固体;MS: m/e = 322.3 (M+H+)として;及びそのエナンチオマー(+)−(1S,5R)−2−[5−(4−フルオロ−フェニルエチニル)−ピリジン−2−イル]−4−メチル−2,4−ジアザビシクロ[3.2.0]ヘプタン−3−オンを明黄色の固体;MS: m/e = 322.3 (M+H+)として生成した。
(−)−(1R,5S)−2−[5−(2,5−ジフルオロ−フェニルエチニル)−ピリジン−2−イル]−4−メチル−2,4−ジアザビシクロ[3.2.0]ヘプタン−3−オン
標記化合物を、実施例1、工程7の一般的方法に従って、(rac)−(1RS,5SR)−2−(5−ヨード−ピリジン−2−イル)−4−メチル−2,4−ジアザ−ビシクロ[3.2.0]ヘプタン−3−オン(実施例1、工程6)(110mg)及び2−エチニル−1,4−ジフルオロベンゼンから開始して調製して、ラセミ物質((+/−)−(rac)−(1SR,5RS)−2−[5−(2,5−ジフルオロ−フェニルエチニル)−ピリジン−2−イル]−4−メチル−2,4−ジアザビシクロ[3.2.0]ヘプタン−3−オン110mg(97%)を明黄色の結晶性固体;MS: m/e = 340.1 (M+H+)として生成し、次いでこれを実施例1、工程8に記載のものと類似の分離条件を使用したキラルHPLCによって分離して、エナンチオピュアなエナンチオマー(−)−(1R,5S)−2−[5−(2,5−ジフルオロ−フェニル−エチニル)−ピリジン−2−イル]−4−メチル−2,4−ジアザビシクロ[3.2.0]ヘプタン−3−オンを明黄色の固体;MS: m/e = 340.1 (M+H+)として;及びそのエナンチオマー(+)−(1S,5R)−2−[5−(2,5−ジフルオロ−フェニル−エチニル)−ピリジン−2−イル]−4−メチル−2,4−ジアザビシクロ[3.2.0]ヘプタン−3−オンを明黄色の固体;MS: m/e = 340.1 (M+H+)として生成した。
実施例I
以下の組成の錠剤を従来法で生産する:
活性成分 100
粉末乳糖 95
白色トウモロコシデンプン 35
ポリビニルピロリドン 8
Naカルボキシメチルデンプン 10
ステアリン酸マグネシウム 2
錠剤重量 250
以下の組成の錠剤を従来法で生産する:
活性成分 200
粉末乳糖 100
白色トウモロコシデンプン 64
ポリビニルピロリドン 12
Naカルボキシメチルデンプン 20
ステアリン酸マグネシウム 4
錠剤重量 400
以下の組成のカプセル剤を生産する:
活性成分 50
結晶性乳糖 60
微結晶セルロース 34
タルク 5
ステアリン酸マグネシウム 1
カプセル充填重量 150
Claims (9)
- 式I:
[式中、
R1は、水素又はFであり;
nは、1又は2である]
で示される化合物又はその薬学的に許容し得る酸付加塩。 - 以下である、請求項1に記載の式Iで示される化合物:
(1S,5R)−2−メチル−4−(5−(フェニルエチニル)ピリジン−2−イル)−2,4−ジアザビシクロ[3.2.0]ヘプタン−3−オン
(1R,5S)−2−(5−((4−フルオロフェニル)エチニル)ピリジン−2−イル)−4−メチル−2,4−ジアザビシクロ[3.2.0]ヘプタン−3−オン
(1R,5S)−2−(5−((3−フルオロフェニル)エチニル)ピリジン−2−イル)−4−メチル−2,4−ジアザビシクロ[3.2.0]ヘプタン−3−オン、又は
(1R,5S)−2−(5−((2,5−ジフルオロフェニル)エチニル)ピリジン−2−イル)−4−メチル−2,4−ジアザビシクロ[3.2.0]ヘプタン−3−オン。 - 以下である、化合物:
(−)−(1R,5S)−2−メチル−4−(5−(フェニルエチニル)ピリジン−2−イル)−2,4−ジアザビシクロ[3.2.0]ヘプタン−3−オン
(+)−(1S,5R)−2−[5−(3−フルオロ−フェニルエチニル)−ピリジン−2−イル]−4−メチル−2,4−ジアザビシクロ[3.2.0]ヘプタン−3−オン
(+)−(1S,5R)−2−[5−(4−フルオロ−フェニルエチニル)−ピリジン−2−イル]−4−メチル−2,4−ジアザビシクロ[3.2.0]ヘプタン−3−オン、又は
(+)−(1S,5R)−2−[5−(2,5−ジフルオロ−フェニル−エチニル)−ピリジン−2−イル]−4−メチル−2,4−ジアザビシクロ[3.2.0]ヘプタン−3−オン。 - 治療活性物質としての使用のための、請求項1〜3のいずれか一項に記載の化合物。
- 請求項1〜3のいずれか一項に記載の式Iで示される化合物の調製プロセスであって、以下の変法:
式II:
[式中、Xは、臭素又はヨウ素から選択されるハロゲン原子である]
で示される化合物を、式III:
で示される好適なアリール−アセチレンと反応させて、式I:
[式中、置換基R1 及びnは、請求項1に定義されたとおりであり、そして、Wは水素又はトリアルキルシリルもしくはアリールジアルキルシリル基である]
で示される化合物を式Iに描写される通りの絶対立体化学を有するエナンチオピュアな形態で形成するか、又はラセミ形態のIIを使用して、続いてIのキラル分離によって光学的に純粋なエナンチオマーを生成し;そして
所望であれば、得られた化合物を薬学的に許容し得る酸付加塩に変換することを含むプロセス。 - 請求項1〜3のいずれか一項に記載の化合物と治療活性担体とを含む、医薬組成物。
- 不安症及び疼痛、鬱病、パーキンソン病、並びに胃食道逆流疾患(GERD)の処置のための、請求項6に記載の医薬組成物。
- 不安症及び疼痛、鬱病、パーキンソン病、並びに胃食道逆流疾患(GERD)の処置のための医薬の製造のための、請求項1〜3のいずれか一項に記載される通りの化合物の使用。
- 不安症及び疼痛、鬱病、パーキンソン病、並びに胃食道逆流疾患(GERD)の処置における使用のための、請求項1〜3のいずれか一項に記載の化合物。
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