CN102015708B - 作为akt蛋白激酶抑制剂的嘧啶基环戊烷 - Google Patents

作为akt蛋白激酶抑制剂的嘧啶基环戊烷 Download PDF

Info

Publication number
CN102015708B
CN102015708B CN200980108322.5A CN200980108322A CN102015708B CN 102015708 B CN102015708 B CN 102015708B CN 200980108322 A CN200980108322 A CN 200980108322A CN 102015708 B CN102015708 B CN 102015708B
Authority
CN
China
Prior art keywords
methyl
dihydro
indoline
pyrimidin
spiro
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.)
Active
Application number
CN200980108322.5A
Other languages
English (en)
Chinese (zh)
Other versions
CN102015708A (zh
Inventor
安娜·班卡
约瑟夫·R·本西克
詹姆斯·F·布拉克
方建朝
马丁·F·亨特曼
伊恩·S·米切尔
道格拉斯·M·萨蒙德
托尼·P·唐
伊莱·M·华莱士
徐睿
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.)
Array Biopharma Inc
Original Assignee
Array Biopharma Inc
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 Array Biopharma Inc filed Critical Array Biopharma Inc
Publication of CN102015708A publication Critical patent/CN102015708A/zh
Application granted granted Critical
Publication of CN102015708B publication Critical patent/CN102015708B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D471/00Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00
    • C07D471/02Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains two hetero rings
    • C07D471/10Spiro-condensed systems
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P1/00Drugs for disorders of the alimentary tract or the digestive system
    • A61P1/16Drugs for disorders of the alimentary tract or the digestive system for liver or gallbladder disorders, e.g. hepatoprotective agents, cholagogues, litholytics
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P17/00Drugs for dermatological disorders
    • A61P17/06Antipsoriatics
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P19/00Drugs for skeletal disorders
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P21/00Drugs for disorders of the muscular or neuromuscular system
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00Drugs for disorders of the nervous system
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00Drugs for disorders of the nervous system
    • A61P25/14Drugs for disorders of the nervous system for treating abnormal movements, e.g. chorea, dyskinesia
    • A61P25/16Anti-Parkinson drugs
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00Drugs for disorders of the nervous system
    • A61P25/28Drugs for disorders of the nervous system for treating neurodegenerative disorders of the central nervous system, e.g. nootropic agents, cognition enhancers, drugs for treating Alzheimer's disease or other forms of dementia
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P29/00Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P3/00Drugs for disorders of the metabolism
    • A61P3/08Drugs for disorders of the metabolism for glucose homeostasis
    • A61P3/10Drugs for disorders of the metabolism for glucose homeostasis for hyperglycaemia, e.g. antidiabetics
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P31/00Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
    • A61P31/04Antibacterial agents
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P31/00Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
    • A61P31/12Antivirals
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P35/00Antineoplastic agents
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P35/00Antineoplastic agents
    • A61P35/02Antineoplastic agents specific for leukemia
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P35/00Antineoplastic agents
    • A61P35/04Antineoplastic agents specific for metastasis
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P37/00Drugs for immunological or allergic disorders
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P37/00Drugs for immunological or allergic disorders
    • A61P37/02Immunomodulators
    • A61P37/06Immunosuppressants, e.g. drugs for graft rejection
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P37/00Drugs for immunological or allergic disorders
    • A61P37/08Antiallergic agents
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P43/00Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P5/00Drugs for disorders of the endocrine system
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P7/00Drugs for disorders of the blood or the extracellular fluid
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P9/00Drugs for disorders of the cardiovascular system
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P9/00Drugs for disorders of the cardiovascular system
    • A61P9/10Drugs for disorders of the cardiovascular system for treating ischaemic or atherosclerotic diseases, e.g. antianginal drugs, coronary vasodilators, drugs for myocardial infarction, retinopathy, cerebrovascula insufficiency, renal arteriosclerosis
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D487/00Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00
    • C07D487/02Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00 in which the condensed system contains two hetero rings
    • C07D487/10Spiro-condensed systems

Landscapes

  • Health & Medical Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • General Chemical & Material Sciences (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Engineering & Computer Science (AREA)
  • Neurology (AREA)
  • Neurosurgery (AREA)
  • Diabetes (AREA)
  • Immunology (AREA)
  • Biomedical Technology (AREA)
  • Oncology (AREA)
  • Hematology (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Endocrinology (AREA)
  • Communicable Diseases (AREA)
  • Cardiology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Obesity (AREA)
  • Pulmonology (AREA)
  • Vascular Medicine (AREA)
  • Urology & Nephrology (AREA)
  • Emergency Medicine (AREA)
  • Hospice & Palliative Care (AREA)
  • Psychiatry (AREA)
  • Psychology (AREA)
  • Pain & Pain Management (AREA)
  • Rheumatology (AREA)
  • Virology (AREA)
  • Dermatology (AREA)
  • Transplantation (AREA)
CN200980108322.5A 2008-01-09 2009-01-09 作为akt蛋白激酶抑制剂的嘧啶基环戊烷 Active CN102015708B (zh)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US2012508P 2008-01-09 2008-01-09
US61/020,125 2008-01-09
PCT/US2009/030603 WO2009089454A1 (en) 2008-01-09 2009-01-09 Pyrimidyl cyclopentanes as akt protein kinase inhibitors

Publications (2)

Publication Number Publication Date
CN102015708A CN102015708A (zh) 2011-04-13
CN102015708B true CN102015708B (zh) 2014-03-26

Family

ID=40436385

Family Applications (1)

Application Number Title Priority Date Filing Date
CN200980108322.5A Active CN102015708B (zh) 2008-01-09 2009-01-09 作为akt蛋白激酶抑制剂的嘧啶基环戊烷

Country Status (11)

Country Link
US (2) US8324221B2 (enExample)
EP (1) EP2240483B8 (enExample)
JP (1) JP5512545B2 (enExample)
CN (1) CN102015708B (enExample)
AR (1) AR070136A1 (enExample)
CA (1) CA2714888C (enExample)
CL (1) CL2009000035A1 (enExample)
ES (1) ES2403284T3 (enExample)
PE (1) PE20091315A1 (enExample)
TW (1) TW200940542A (enExample)
WO (1) WO2009089454A1 (enExample)

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW200940542A (en) 2008-01-09 2009-10-01 Array Biopharma Inc Pyrimidyl cyclopentanes as AKT protein kinase inhibitors
US20100048913A1 (en) 2008-03-14 2010-02-25 Angela Brodie Novel C-17-Heteroaryl Steroidal CYP17 Inhibitors/Antiandrogens;Synthesis In Vitro Biological Activities, Pharmacokinetics and Antitumor Activity
SI2285808T1 (sl) 2008-04-29 2014-03-31 Novartis Ag Spiro-indolni derivati za zdravljenje parazitskih bolezni
EP2393827B1 (en) 2009-02-05 2015-10-07 Tokai Pharmaceuticals, Inc. Novel prodrugs of steroidal cyp17 inhibitors/antiandrogens
TWI466885B (zh) 2009-07-31 2015-01-01 Japan Tobacco Inc 含氮螺環化合物及其醫藥用途
WO2013057944A1 (ja) 2011-10-19 2013-04-25 興和株式会社 新規なスピロインドリン化合物、及びそれを含有する医薬
AU2013251475B2 (en) 2012-04-26 2018-01-04 The General Hospital Corporation Agents and methods for treating and preventing seborrheic keratosis
SG11201507093WA (en) 2013-03-14 2015-10-29 Univ Maryland Baltimore Office Of Technology Transfer Androgen receptor down-regulating agents and uses thereof
US10508309B2 (en) 2013-05-17 2019-12-17 The General Hospital Corporation Methods for detecting and treating variants of seborrheic keratoses
SG11201600525XA (en) 2013-08-12 2016-02-26 Tokai Pharmaceuticals Inc Biomarkers for treatment of neoplastic disorders using androgen-targeted therapies
AR103598A1 (es) 2015-02-02 2017-05-24 Forma Therapeutics Inc Ácidos bicíclicos[4,6,0]hidroxámicos como inhibidores de hdac
AU2016215432B2 (en) 2015-02-02 2020-07-30 Valo Early Discovery, Inc. 3-alkyl-4-amido-bicyclic [4,5,0] hydroxamic acids as HDAC inhibitors
CA2979391C (en) 2015-03-13 2023-10-17 Forma Therapeutics, Inc. Alpha-cinnamide compounds and compositions as hdac8 inhibitors
EP3472131B1 (en) 2016-06-17 2020-02-19 Forma Therapeutics, Inc. 2-spiro-5- and 6-hydroxamic acid indanes as hdac inhibitors
MX2020004202A (es) 2017-10-30 2020-08-13 Neuropore Therapies Inc Fenil sulfonil fenil triazol tionas sustituidas y usos de las mismas.
TWI830733B (zh) * 2018-05-11 2024-02-01 中國大陸商迪哲(江蘇)醫藥有限公司 環戊烷化合物
WO2021118924A2 (en) 2019-12-12 2021-06-17 Ting Therapeutics Llc Compositions and methods for the prevention and treatment of hearing loss
JP2024500286A (ja) 2020-11-23 2024-01-09 エナンタ ファーマシューティカルズ インコーポレイテッド 新規スピロピロリジン誘導抗ウイルス剤
WO2022235605A1 (en) 2021-05-04 2022-11-10 Enanta Pharmaceuticals, Inc. Novel macrocyclic antiviral agents
US12398147B2 (en) 2021-05-11 2025-08-26 Enanta Pharmaceuticals, Inc. Macrocyclic spiropyrrolidine derived antiviral agents
US12479854B2 (en) 2021-07-29 2025-11-25 Enanta Pharmaceuticals, Inc. Spiropyrrolidine derived antiviral agents
WO2023086352A1 (en) 2021-11-12 2023-05-19 Enanta Pharmaceuticals, Inc. Novel spiropyrrolidine derived antiviral agents
US11858945B2 (en) 2021-11-12 2024-01-02 Enanta Pharmaceuticals, Inc. Alkyne-containing antiviral agents
US11919910B2 (en) 2021-11-12 2024-03-05 Enanta Pharmaceuticals, Inc. Spiropyrrolidine derived antiviral agents
US20230159546A1 (en) * 2021-11-18 2023-05-25 Enanta Pharmaceuticals, Inc. Novel spiropyrrolidine derived antiviral agents
WO2023107419A1 (en) 2021-12-08 2023-06-15 Enanta Pharmaceuticals, Inc. Saturated spirocyclics as antiviral agents
WO2023107417A1 (en) 2021-12-08 2023-06-15 Enanta Pharmaceuticals, Inc. Heterocyclic antiviral agents
WO2023196307A1 (en) 2022-04-05 2023-10-12 Enanta Pharmaceuticals, Inc. Novel spiropyrrolidine derived antiviral agents
CN114751852B (zh) * 2022-05-23 2023-09-15 山西库邦生物医药科技有限公司 一种西咯多辛关键中间体的制备方法
US20250320224A1 (en) * 2022-06-03 2025-10-16 Domain Therapeutics Novel par-2 inhibitors
CN116903625B (zh) * 2023-02-16 2025-09-23 广州安岩仁医药科技有限公司 一种egfr抑制剂中间体及其合成方法与应用
CN117700429A (zh) * 2023-12-21 2024-03-15 广州白云科技股份有限公司 聚氨酯扩链剂、聚氨酯预聚体、力致变色聚氨酯胶及其制备方法

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002022605A1 (en) * 2000-09-15 2002-03-21 Vertex Pharmaceuticals Incorporated Pyrazole compounds useful as protein kinase inhibitors
NZ547327A (en) 2003-11-21 2009-08-28 Array Biopharma Inc AKT protein kinase inhibitors
WO2005113762A1 (en) 2004-05-18 2005-12-01 Pfizer Products Inc. CRYSTAL STRUCTURE OF PROTEIN KINASE B-α (AKT-1) AND USES THEREOF
EP1858902A1 (en) 2005-02-24 2007-11-28 Pfizer Products Incorporated Bicyclic heteroaromatic derivatives useful as anticancer agents
US7495007B2 (en) 2006-03-13 2009-02-24 Hoffmann-La Roche Inc. Spiroindolinone derivatives
CA2656618C (en) 2006-07-06 2014-08-26 Array Biopharma Inc. Cyclopenta [d] pyrimidines as akt protein kinase inhibitors
US8063050B2 (en) 2006-07-06 2011-11-22 Array Biopharma Inc. Hydroxylated and methoxylated pyrimidyl cyclopentanes as AKT protein kinase inhibitors
UA95641C2 (xx) 2006-07-06 2011-08-25 Эррей Биофарма Инк. Гідроксильовані піримідильні циклопентани як інгібітори акт протеїнкінази$гидроксилированные пиримидильные циклопентаны как ингибиторы акт протеинкиназы
US20080051419A1 (en) 2006-07-26 2008-02-28 Pfizer Inc. Amine derivatives useful as anticancer agents
PE20090829A1 (es) 2007-06-20 2009-07-25 Glaxo Group Ltd Espiroindolinas como moduladores de receptores de quimioquinas
WO2009006567A2 (en) 2007-07-05 2009-01-08 Array Biopharma Inc. Pyrimidyl cyclopentanes as akt protein kinase inhibitors
TW200940542A (en) 2008-01-09 2009-10-01 Array Biopharma Inc Pyrimidyl cyclopentanes as AKT protein kinase inhibitors

Also Published As

Publication number Publication date
US9346805B2 (en) 2016-05-24
CA2714888A1 (en) 2009-07-16
EP2240483B8 (en) 2013-04-03
US20130072500A1 (en) 2013-03-21
AR070136A1 (es) 2010-03-17
EP2240483B1 (en) 2013-02-27
ES2403284T3 (es) 2013-05-17
US20110053959A1 (en) 2011-03-03
WO2009089454A1 (en) 2009-07-16
CA2714888C (en) 2017-03-14
PE20091315A1 (es) 2009-09-21
HK1149270A1 (en) 2011-09-30
CL2009000035A1 (es) 2009-11-27
JP2011509307A (ja) 2011-03-24
JP5512545B2 (ja) 2014-06-04
CN102015708A (zh) 2011-04-13
US8324221B2 (en) 2012-12-04
EP2240483A1 (en) 2010-10-20
TW200940542A (en) 2009-10-01

Similar Documents

Publication Publication Date Title
CN102015708B (zh) 作为akt蛋白激酶抑制剂的嘧啶基环戊烷
CN101631778B (zh) 作为akt蛋白激酶抑制剂的环戊二烯并[d]嘧啶
CN104884458B (zh) 作为蛋白质激酶抑制剂的稠合杂环化合物
CN103415520B (zh) 吡咯并六元杂芳环类衍生物、其制备方法及其在医药上的应用
CN101801955B (zh) 作为akt蛋白激酶抑制剂的嘧啶基环戊烷
CN101578273A (zh) 作为akt蛋白激酶抑制剂的羟基化和甲氧基化的环戊二烯并[d]嘧啶
WO2013078254A1 (en) Bicyclic heteroaryl derivatives as kinase inhibitors
KR20130086520A (ko) 스피로시클릭 화합물 및 이들의 치료제 및 진단 프로브로서 용도
KR20180031823A (ko) 피리다지논, 그의 제조 방법 및 사용 방법
CN102906095A (zh) 作为syk和jak抑制剂的吡咯并吡嗪衍生物
CN101516891A (zh) 作为akt蛋白激酶抑制剂的二氢噻吩并嘧啶
HK1149270B (en) Pyrimidyl cyclopentanes as akt protein kinase inhibitors
TWI602818B (zh) 稠合雜環化合物作爲蛋白激酶抑制劑
HK1126758B (en) Cyclopenta [d] pyrimidines as akt protein kinase inhibitors

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant