1
|
Lim JJ, Arrington K, Dunn AL, Leitch DC, Andrews I, Curtis NR, Hughes MJ, Tray DR, Wade CE, Whiting MP, Goss C, Liu YC, Roesch BM. A Flow Process Built upon a Batch Foundation—Preparation of a Key Amino Alcohol Intermediate via Multistage Continuous Synthesis. Org Process Res Dev 2020. [DOI: 10.1021/acs.oprd.9b00478] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- John Jin Lim
- Chemical Development, API Chemistry, GlaxoSmithKline, Upper Providence, Pennsylvania 19426, United States
| | - Kenneth Arrington
- Chemical Development, API Chemistry, GlaxoSmithKline, Upper Providence, Pennsylvania 19426, United States
| | - Anna L. Dunn
- Chemical Development, API Chemistry, GlaxoSmithKline, Upper Providence, Pennsylvania 19426, United States
| | - David C. Leitch
- Chemical Development, API Chemistry, GlaxoSmithKline, Upper Providence, Pennsylvania 19426, United States
- Department of Chemistry, University of Victoria, Victoria, BC V8P 5C2, Canada
| | - Ian Andrews
- Chemical Development, API Chemistry, GlaxoSmithKline, Upper Providence, Pennsylvania 19426, United States
| | - Neil R. Curtis
- Chemical Development, API Chemistry, GlaxoSmithKline, Stevenage SG1 2NY, U.K
| | - Mark J. Hughes
- Chemical Development, API Chemistry, GlaxoSmithKline, Stevenage SG1 2NY, U.K
| | - Daniel R. Tray
- Chemical Development, API Chemistry, GlaxoSmithKline, Stevenage SG1 2NY, U.K
| | - Charles E. Wade
- Chemical Development, API Chemistry, GlaxoSmithKline, Stevenage SG1 2NY, U.K
| | - Matthew P. Whiting
- Chemical Development, API Chemistry, GlaxoSmithKline, Stevenage SG1 2NY, U.K
| | - Charles Goss
- Chemical Development, Product and Process Engineering, GlaxoSmithKline, Upper Providence, Pennsylvania 19426, United States
| | - Yangmu Chloe Liu
- Chemical Development, API Chemistry, GlaxoSmithKline, Stevenage SG1 2NY, U.K
| | - Brian M. Roesch
- Chemical Development, API Chemistry, GlaxoSmithKline, Stevenage SG1 2NY, U.K
| |
Collapse
|
2
|
Gordon CP. Synthetic strategies to access staphylococcus auto-inducing peptides as quorum sensing modulators. Org Biomol Chem 2020; 18:379-390. [PMID: 31844862 DOI: 10.1039/c9ob02038a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The accessory gene regulator (agr) quorum-sensing system is arguably the most important regulator of staphylococcus virulence and has been the focus of tremendous interest in the development of effective therapies for pathogenic bacterial infections. With regards to chemotherapeutic based strategies, the significant proportion of currently reported agr-system modulating molecules are mimics of the native ArgC substrate, which is a thioester-based macrocyclic peptide know as the auto-inducing peptide. Over the past two decades, more than two-hundred synthetic analogues have been reported. This review traces the development of the synthetic strategies employed to synthesise these analogues with a particular focus on macrocyclisation. At present these synthetic approaches can be clustered into five broad categories (1) solution-phase cyclisation, (2) immobilised carbodiimide assisted cyclisation, (3) concomitant on-resin cleavage and macrocyclisation, (4) Boc-compatible chemoselective thioesterification, and (5) Fmoc-compatible chemoselective thioesterification. The advantages and limitation provided by each of the approaches are compared and contrasted with a view towards potential reaction scale-up.
Collapse
Affiliation(s)
- Christopher P Gordon
- School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith South DC, NSW 2751, Australia.
| |
Collapse
|
3
|
O'Brien AG, Liu YC, Hughes MJ, Lim JJ, Hodnett NS, Falco N. Investigation of a Weak Temperature-Rate Relationship in the Carbamoylation of a Barbituric Acid Pharmaceutical Intermediate. J Org Chem 2019; 84:4948-4952. [PMID: 30840462 DOI: 10.1021/acs.joc.9b00411] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The rate of reaction between N, N'-dicyclohexylbarbituric acid 1 and ethyl 2-isocyanatoacetate 2 is invariant with temperature. Positive orders in each reactant and dissociation of triethylammonium salts of 1 and product 3 at elevated temperature indicate that reaction occurs via a catalytic mechanism where changes to the positions of equilibria negate changes in the rate of the turnover-limiting step. A model for the consumption of 1 in a flow reactor accurately predicted the outcome of a laboratory-scale multivariate study.
Collapse
Affiliation(s)
- Alexander G O'Brien
- GlaxoSmithKline , 1250 South Collegeville Road , Collegeville , Pennsylvania 19426 , United States
| | - Yangmu Chloe Liu
- GlaxoSmithKline , 1250 South Collegeville Road , Collegeville , Pennsylvania 19426 , United States
| | - Mark J Hughes
- GlaxoSmithKline , Medicines Research Centre , Gunnels Wood Road , Stevenage , Hertfordshire SG1 2NY , United Kingdom
| | - John Jin Lim
- GlaxoSmithKline , 1250 South Collegeville Road , Collegeville , Pennsylvania 19426 , United States
| | - Neil S Hodnett
- GlaxoSmithKline , Medicines Research Centre , Gunnels Wood Road , Stevenage , Hertfordshire SG1 2NY , United Kingdom
| | - Nicholas Falco
- GlaxoSmithKline , 1250 South Collegeville Road , Collegeville , Pennsylvania 19426 , United States
| |
Collapse
|