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Perry MWD, Björhall K, Bonn B, Carlsson J, Chen Y, Eriksson A, Fredlund L, Hao H, Holden NS, Karabelas K, Lindmark H, Liu F, Pemberton N, Petersen J, Rodrigo Blomqvist S, Smith RW, Svensson T, Terstiege I, Tyrchan C, Yang W, Zhao S, Öster L. Design and Synthesis of Soluble and Cell-Permeable PI3Kδ Inhibitors for Long-Acting Inhaled Administration. J Med Chem 2017; 60:5057-5071. [PMID: 28520415 DOI: 10.1021/acs.jmedchem.7b00401] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
PI3Kδ is a lipid kinase that is believed to be important in the migration and activation of cells of the immune system. Inhibition is hypothesized to provide a powerful yet selective immunomodulatory effect that may be beneficial for the treatment of conditions such as asthma or rheumatoid arthritis. In this work, we describe the identification of inhibitors based on a thiazolopyridone core structure and their subsequent optimization for inhalation. The initially identified compound (13) had good potency and isoform selectivity but was not suitable for inhalation. Addition of basic substituents to a region of the molecule pointing to solvent was tolerated (enzyme inhibition pIC50 > 9), and by careful manipulation of the pKa and lipophilicity, we were able to discover compounds (20b, 20f) with good lung retention and cell potency that could be taken forward to in vivo studies where significant target engagement could be demonstrated.
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Affiliation(s)
- Matthew W D Perry
- Respiratory, Inflammation and Autoimmunity, Innovative Medicines and Early Development, AstraZeneca Gothenburg , Pepparedsleden 1, SE-431 83 Mölndal, Sweden
| | - Karin Björhall
- Respiratory, Inflammation and Autoimmunity, Innovative Medicines and Early Development, AstraZeneca Gothenburg , Pepparedsleden 1, SE-431 83 Mölndal, Sweden
| | - Britta Bonn
- Respiratory, Inflammation and Autoimmunity, Innovative Medicines and Early Development, AstraZeneca Gothenburg , Pepparedsleden 1, SE-431 83 Mölndal, Sweden
| | | | - Yunhua Chen
- Pharmaron Beijing Co., Ltd. , No. 6 Taihe Road, BDA, Beijing 100176, P.R. China
| | - Anders Eriksson
- Respiratory, Inflammation and Autoimmunity, Innovative Medicines and Early Development, AstraZeneca Gothenburg , Pepparedsleden 1, SE-431 83 Mölndal, Sweden
| | | | - Hai'e Hao
- Pharmaron Beijing Co., Ltd. , No. 6 Taihe Road, BDA, Beijing 100176, P.R. China
| | - Neil S Holden
- Respiratory, Inflammation and Autoimmunity, Innovative Medicines and Early Development, AstraZeneca Gothenburg , Pepparedsleden 1, SE-431 83 Mölndal, Sweden
| | - Kostas Karabelas
- Respiratory, Inflammation and Autoimmunity, Innovative Medicines and Early Development, AstraZeneca Gothenburg , Pepparedsleden 1, SE-431 83 Mölndal, Sweden
| | | | - Feifei Liu
- Pharmaron Beijing Co., Ltd. , No. 6 Taihe Road, BDA, Beijing 100176, P.R. China
| | - Nils Pemberton
- Respiratory, Inflammation and Autoimmunity, Innovative Medicines and Early Development, AstraZeneca Gothenburg , Pepparedsleden 1, SE-431 83 Mölndal, Sweden
| | | | - Sandra Rodrigo Blomqvist
- Respiratory, Inflammation and Autoimmunity, Innovative Medicines and Early Development, AstraZeneca Gothenburg , Pepparedsleden 1, SE-431 83 Mölndal, Sweden
| | - Reed W Smith
- Respiratory, Inflammation and Autoimmunity, Innovative Medicines and Early Development, AstraZeneca Gothenburg , Pepparedsleden 1, SE-431 83 Mölndal, Sweden
| | - Tor Svensson
- Respiratory, Inflammation and Autoimmunity, Innovative Medicines and Early Development, AstraZeneca Gothenburg , Pepparedsleden 1, SE-431 83 Mölndal, Sweden
| | - Ina Terstiege
- Respiratory, Inflammation and Autoimmunity, Innovative Medicines and Early Development, AstraZeneca Gothenburg , Pepparedsleden 1, SE-431 83 Mölndal, Sweden
| | - Christian Tyrchan
- Respiratory, Inflammation and Autoimmunity, Innovative Medicines and Early Development, AstraZeneca Gothenburg , Pepparedsleden 1, SE-431 83 Mölndal, Sweden
| | - Wenzhen Yang
- Pharmaron Beijing Co., Ltd. , No. 6 Taihe Road, BDA, Beijing 100176, P.R. China
| | - Shuchun Zhao
- Pharmaron Beijing Co., Ltd. , No. 6 Taihe Road, BDA, Beijing 100176, P.R. China
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