3
|
Demkiw K, Araki H, Elliott EL, Franklin CL, Fukuzumi Y, Hicks F, Hosoi K, Hukui T, Ishimaru Y, O'Brien E, Omori Y, Mineno M, Mizufune H, Sawada N, Sawai Y, Zhu L. A Nitrogen-Assisted One-Pot Heteroaryl Ketone Synthesis from Carboxylic Acids and Heteroaryl Halides. J Org Chem 2016; 81:3447-56. [PMID: 26991511 DOI: 10.1021/acs.joc.6b00194] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A practical and highly effective one-pot synthesis of versatile heteroaryl ketones directly from carboxylic acids and heteroaryl halides under mild conditions is reported. This method does not require derivatization of carboxylic acids (preparation of acid chlorides, Weinreb amides, etc.) or the use of any additives/catalysts. A wide substrate scope of carboxylic acids with high functional group tolerance has also been demonstrated. The results reveal that the presence of an α-nitrogen on the halide substrate greatly improves the desired ketone formation.
Collapse
Affiliation(s)
- Krystyna Demkiw
- Chemical Development Laboratories, Millennium Pharmaceuticals, Inc. , a subsidiary of Takeda Pharmaceutical Company Limited, 40 Landsdowne Street, Cambridge, Massachusetts 02139, United States
| | - Hirofumi Araki
- Chemical Development Laboratories, CMC Center, Takeda Pharmaceutical Company Limited , 17-85, Jusohonmachi 2-chome, Yodogawa-ku, Osaka 532-8686, Japan
| | - Eric L Elliott
- Chemical Development Laboratories, Millennium Pharmaceuticals, Inc. , a subsidiary of Takeda Pharmaceutical Company Limited, 40 Landsdowne Street, Cambridge, Massachusetts 02139, United States
| | - Christopher L Franklin
- Chemical Development Laboratories, Millennium Pharmaceuticals, Inc. , a subsidiary of Takeda Pharmaceutical Company Limited, 40 Landsdowne Street, Cambridge, Massachusetts 02139, United States
| | - Yoonjoo Fukuzumi
- Chemical Development Laboratories, CMC Center, Takeda Pharmaceutical Company Limited , 17-85, Jusohonmachi 2-chome, Yodogawa-ku, Osaka 532-8686, Japan
| | - Frederick Hicks
- Chemical Development Laboratories, Millennium Pharmaceuticals, Inc. , a subsidiary of Takeda Pharmaceutical Company Limited, 40 Landsdowne Street, Cambridge, Massachusetts 02139, United States
| | - Kazushi Hosoi
- Chemical Development Laboratories, CMC Center, Takeda Pharmaceutical Company Limited , 17-85, Jusohonmachi 2-chome, Yodogawa-ku, Osaka 532-8686, Japan
| | - Tadashi Hukui
- Chemical Development Laboratories, CMC Center, Takeda Pharmaceutical Company Limited , 17-85, Jusohonmachi 2-chome, Yodogawa-ku, Osaka 532-8686, Japan
| | - Yoichiro Ishimaru
- Chemical Development Laboratories, CMC Center, Takeda Pharmaceutical Company Limited , 17-85, Jusohonmachi 2-chome, Yodogawa-ku, Osaka 532-8686, Japan
| | - Erin O'Brien
- Chemical Development Laboratories, Millennium Pharmaceuticals, Inc. , a subsidiary of Takeda Pharmaceutical Company Limited, 40 Landsdowne Street, Cambridge, Massachusetts 02139, United States
| | - Yoshimasa Omori
- Chemical Development Laboratories, CMC Center, Takeda Pharmaceutical Company Limited , 17-85, Jusohonmachi 2-chome, Yodogawa-ku, Osaka 532-8686, Japan
| | - Masahiro Mineno
- Chemical Development Laboratories, CMC Center, Takeda Pharmaceutical Company Limited , 17-85, Jusohonmachi 2-chome, Yodogawa-ku, Osaka 532-8686, Japan
| | - Hideya Mizufune
- Chemical Development Laboratories, CMC Center, Takeda Pharmaceutical Company Limited , 17-85, Jusohonmachi 2-chome, Yodogawa-ku, Osaka 532-8686, Japan
| | - Naotaka Sawada
- Chemical Development Laboratories, CMC Center, Takeda Pharmaceutical Company Limited , 17-85, Jusohonmachi 2-chome, Yodogawa-ku, Osaka 532-8686, Japan
| | - Yasuhiro Sawai
- Chemical Development Laboratories, CMC Center, Takeda Pharmaceutical Company Limited , 17-85, Jusohonmachi 2-chome, Yodogawa-ku, Osaka 532-8686, Japan
| | - Lei Zhu
- Chemical Development Laboratories, Millennium Pharmaceuticals, Inc. , a subsidiary of Takeda Pharmaceutical Company Limited, 40 Landsdowne Street, Cambridge, Massachusetts 02139, United States
| |
Collapse
|
8
|
Lima PC, Avery MA, Tekwani BL, de Alves HM, Barreiro EJ, Fraga CAM. Synthesis and biological evaluation of new imidazo[1,2-a]pyridine derivatives designed as mefloquine analogues. FARMACO (SOCIETA CHIMICA ITALIANA : 1989) 2002; 57:825-32. [PMID: 12420878 DOI: 10.1016/s0014-827x(02)01304-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This paper describes the synthesis and the in vitro antimalarial profile of two new imidazo[1,2-a]pyridine derivatives 4HCl and 13HCl, structurally proposed as mefloquine (1) analogues, by exploring bioisosterism and molecular simplification tools. The synthetic route employed to access the title compounds used, as starting material, the previously described ethyl 2-methylimidazo[1,2-aJpyridine-3-carboxylate derivative (5). These novel heterocyclic derivatives 4HCl and 13HCl presented modest antimalarial activity against the W-2 and D-6 clones of Plasmodium falciparum as well as inhibitors of in vitro heme polymerization compared to mefloquine.
Collapse
Affiliation(s)
- Patricia C Lima
- Laboratório de Avaliação e Sintese de Substâncias Bioativas, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, RJ, Brazil
| | | | | | | | | | | |
Collapse
|
10
|
Bhattacharjee AK, Karle JM. Molecular electronic properties of a series of 4-quinolinecarbinolamines define antimalarial activity profile. J Med Chem 1996; 39:4622-9. [PMID: 8917651 DOI: 10.1021/jm960358z] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
A detailed computational study on a series of 4-quinolinecarbinolamine antimalarials was performed using the semiempirical Austin model 1 (AM1) quantum chemical method to correlate the electronic features with antimalarial activity and to illuminate more completely the fundamental molecular level forces that affect the function and utility of the compounds. Ab initio (3-21G level) calculations were performed on mefloquine, the lead compound in this series, to check the reliability of the AM1 method. Electron density in specific regions of the molecules appears to play the pivotal role toward activity. A large laterally extended negative potential in the frontal portion of the nitrogen atom of the quinoline ring and the absence of negative potential over the molecular plane are crucial for the potent antimalarials. These electrostatic features are likely to be the modulator of hydrophobicity or lipophilicity of the compounds and, hence, determine their activities. The magnitude of the positive potential located by the hydroxyl hydrogen atom also correlates with potent antimalarial activity. Two negative potential regions occur near the hydroxyl oxygen and piperidyl nitrogen atoms. The two negative potential regions and the positive potential located by the hydroxyl hydrogen atom are consistent with intermolecular hydrogen bonding with the cellular effectors. The present modeling study should aid in efficient designing of this class of antimalarial agents.
Collapse
Affiliation(s)
- A K Bhattacharjee
- Department of Pharmacology, Walter Reed Army Institute of Research, Washington, D.C. 20307-5100, USA
| | | |
Collapse
|
11
|
Ismail FM, Dascombe MJ, Carr P, North SE. An exploration of the structure-activity relationships of 4-aminoquinolines: novel antimalarials with activity in-vivo. J Pharm Pharmacol 1996; 48:841-50. [PMID: 8887736 DOI: 10.1111/j.2042-7158.1996.tb03985.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The structure-activity relationships of bisquinolines, a potentially important group of novel antimalarial drugs, were studied. The high-temperature (180-250 degrees C) synthesis of 4-aminoquinolines, including bisquinolines, by nucleophilic displacement was both fast and efficient Several bisquinolines including (+/-)-trans-N1,N2-bis(7-trifluoroquinolin-4-yl)cyclohexane-1, 2-diamine and 1R,2R-(-)-, 1S,2S-(+)-, (+/-)-trans- and cis-N1, N2-bis(7-chloroquinolin-4-yl)cyclohexane-1,2-diamine exhibited potent activity against Plasmodium berghei in mice; (+/-)-trans-N1,N2-bis(7-chloroquinolin-4-yl)cyclohexane-1, 2-diamine was orally active. Our results indicate that these compounds conform to a putative receptor for quinoline antimalarials. In addition, a 7-haloquinoline linked by a heterocyclic bridge, at the 4-position, to another heterocycle (such as an acridine at the 9-position) maximally occupies the active site of our postulated target.
Collapse
Affiliation(s)
- F M Ismail
- Division of Chemical Sciences, School of Natural Sciences, University of Hertfordshire, Hatfield, UK
| | | | | | | |
Collapse
|