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Scott ME, Wang X, Humphreys LD, Geier MJ, Kannan B, Chan J, Brown G, Dourado DFAR, Gray D, Mix S, Pukin A. Enzyme Optimization and Process Development for a Scalable Synthesis of (R)-2-Methoxymandelic Acid. Org Process Res Dev 2021. [DOI: 10.1021/acs.oprd.1c00250] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mark E. Scott
- Gilead Alberta ULC, 1021 Hayter Road NW, Edmonton, Alberta, Canada, T6S 1A1
| | - Xiaotian Wang
- Gilead Alberta ULC, 1021 Hayter Road NW, Edmonton, Alberta, Canada, T6S 1A1
| | - Luke D. Humphreys
- Gilead Alberta ULC, 1021 Hayter Road NW, Edmonton, Alberta, Canada, T6S 1A1
| | - Michael J. Geier
- Gilead Alberta ULC, 1021 Hayter Road NW, Edmonton, Alberta, Canada, T6S 1A1
| | - Balamurali Kannan
- Gilead Alberta ULC, 1021 Hayter Road NW, Edmonton, Alberta, Canada, T6S 1A1
| | - Johann Chan
- Gilead Sciences, Inc, 333 Lakeside Drive, Foster City, California 94404, United States
| | - Gareth Brown
- Almac Sciences, 20 Seagoe Industrial Est., Craigavon BT63 5QD, U.K
| | | | - Darren Gray
- Almac Sciences, 20 Seagoe Industrial Est., Craigavon BT63 5QD, U.K
| | - Stefan Mix
- Almac Sciences, 20 Seagoe Industrial Est., Craigavon BT63 5QD, U.K
| | - Aliaksei Pukin
- Almac Sciences, 20 Seagoe Industrial Est., Craigavon BT63 5QD, U.K
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Morrison H, Osan R, Horstman E, Lee E, Ritchie S, Payne P, Scott ME, Geier MJ, Wang X. Correlation of Drug Substance Bulk Properties to Predict and Troubleshoot the Formulation of Drug Products: The API Camera. Org Process Res Dev 2021. [DOI: 10.1021/acs.oprd.1c00043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Henry Morrison
- Gilead Sciences, Inc., 333 Lakeside Drive, Foster City, California 94404, United States
| | - Remus Osan
- Gilead Sciences, Inc., 333 Lakeside Drive, Foster City, California 94404, United States
| | - Elizabeth Horstman
- Gilead Sciences, Inc., 333 Lakeside Drive, Foster City, California 94404, United States
| | - Ernest Lee
- Gilead Alberta ULC, 1021 Hayter Road NW, Edmonton, Alberta T6S 1A1, Canada
| | - Sean Ritchie
- Gilead Sciences, Inc., 333 Lakeside Drive, Foster City, California 94404, United States
| | - Philippa Payne
- Gilead Alberta ULC, 1021 Hayter Road NW, Edmonton, Alberta T6S 1A1, Canada
| | - Mark E. Scott
- Gilead Alberta ULC, 1021 Hayter Road NW, Edmonton, Alberta T6S 1A1, Canada
| | - Michael J. Geier
- Gilead Alberta ULC, 1021 Hayter Road NW, Edmonton, Alberta T6S 1A1, Canada
| | - Xiaotian Wang
- Gilead Alberta ULC, 1021 Hayter Road NW, Edmonton, Alberta T6S 1A1, Canada
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Geier MJ, Wang X, Humphreys LD, Calimsiz S, Scott ME. Warming Up to Oxazole: Noncryogenic Oxazole Metalation and Negishi Coupling Development. Synlett 2019. [DOI: 10.1055/s-0037-1611909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
This report details the development of several suitable noncryogenic metalation conditions for the synthesis of oxazole zincate. Subsequent rounds of high-throughput catalyst screening ultimately led to the identification of several suitable Pd sources that can be used for the Negishi coupling of unsubstituted oxazole. The scope and generality for one of the reported conditions is also presented.
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McCulley C, Geier MJ, Hudson BM, Gagné MR, Tantillo DJ. Biomimetic Platinum-Promoted Polyene Polycyclizations: Influence of Alkene Substitution and Pre-cyclization Conformations. J Am Chem Soc 2017; 139:11158-11164. [PMID: 28719198 PMCID: PMC5699452 DOI: 10.1021/jacs.7b05381] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Results of kinetic experiments and quantum chemical computations on a series of platinum-promoted polycyclization reactions are described. Analyses of these results reveal a reactivity model that reaches beyond the energetics of the cascade itself, incorporating an ensemble of pre-cyclization conformations of the platinum-alkene reactant complex, only a subset of which are productive for bi- (or larger) cyclization and lead to products. Similarities and differences between this scenario, including reaction coordinates for polycyclization, for platinum- and enzyme-promoted polycyclization reactions are highlighted.
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Affiliation(s)
- Christina McCulley
- Department of Chemistry, University of California–Davis, Davis, CA 95616, USA
| | - Michael J. Geier
- Caudill Laboratories, Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Brandi M. Hudson
- Department of Chemistry, University of California–Davis, Davis, CA 95616, USA
| | - Michel R. Gagné
- Caudill Laboratories, Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Dean J. Tantillo
- Department of Chemistry, University of California–Davis, Davis, CA 95616, USA
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Abstract
Application of a tridentate NHC containing pincer ligand to Pt catalyzed cascade cyclization reactions has allowed for the catalytic, diastereoselective cycloisomerization of biogenic alkene terminated substrates to the their polycyclic counterparts.
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Affiliation(s)
- Michael J Geier
- Caudill Laboratories, Department of Chemistry, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599-3290, United States
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Webb MI, Halcovitch NR, Bowes EG, Lee GM, Geier MJ, Vogels CM, O'Neill T, Li H, Flewelling A, Decken A, Gray CA, Westcott SA. Arylspiroborates Derived from 4-tert-Butylcatechol and 3,5-Di-tert-butylcatechol and Their Antimicrobial Activities. J Heterocycl Chem 2013. [DOI: 10.1002/jhet.1997] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Michael I. Webb
- Department of Chemistry and Biochemistry; Mount Allison University; Sackville New Brunswick E4L 1G8 Canada
| | - Nathan R. Halcovitch
- Department of Chemistry and Biochemistry; Mount Allison University; Sackville New Brunswick E4L 1G8 Canada
| | - Eric G. Bowes
- Department of Chemistry and Biochemistry; Mount Allison University; Sackville New Brunswick E4L 1G8 Canada
| | - Graham M. Lee
- Department of Chemistry and Biochemistry; Mount Allison University; Sackville New Brunswick E4L 1G8 Canada
| | - Michael J. Geier
- Department of Chemistry and Biochemistry; Mount Allison University; Sackville New Brunswick E4L 1G8 Canada
| | - Christopher M. Vogels
- Department of Chemistry and Biochemistry; Mount Allison University; Sackville New Brunswick E4L 1G8 Canada
| | - Taryn O'Neill
- Department of Biology; University of New Brunswick; Saint John NB E2L 4L5 Canada
| | - Haoxin Li
- Department of Biology; University of New Brunswick; Saint John NB E2L 4L5 Canada
| | - Andrew Flewelling
- Department of Biology; University of New Brunswick; Saint John NB E2L 4L5 Canada
| | - Andreas Decken
- Department of Chemistry; University of New Brunswick; Fredericton New Brunswick E3B 5A3 Canada
| | - Christopher A. Gray
- Department of Biology; University of New Brunswick; Saint John NB E2L 4L5 Canada
- Department of Chemistry; University of New Brunswick; Fredericton New Brunswick E3B 5A3 Canada
| | - Stephen A. Westcott
- Department of Chemistry and Biochemistry; Mount Allison University; Sackville New Brunswick E4L 1G8 Canada
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Burford RJ, Geier MJ, Vogels CM, Decken A, Westcott SA. Addition of boranes to iminophosphines: Synthesis and reactivity of a new bulky hydroboration reagent. J Organomet Chem 2013. [DOI: 10.1016/j.jorganchem.2013.02.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Geier MJ, Bowes EG, Lee GM, Li H, O'Neill T, Flewelling A, Vogels CM, Decken A, Gray CA, Westcott SA. Synthesis and Biological Activities of Arylspiroborates Derived from 2,3-Dihydroxynaphthalene. Heteroatom Chem 2013. [DOI: 10.1002/hc.21072] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Michael J. Geier
- Department of Chemistry and Biochemistry; Mount Allison University; Sackville; New Brunswick; E4L 1G8; Canada
| | - Eric G. Bowes
- Department of Chemistry and Biochemistry; Mount Allison University; Sackville; New Brunswick; E4L 1G8; Canada
| | - Graham M. Lee
- Department of Chemistry and Biochemistry; Mount Allison University; Sackville; New Brunswick; E4L 1G8; Canada
| | - Haoxin Li
- Department of Biology; University of New Brunswick; Saint John; New Brunswick; E2L 4L5; Canada
| | - Taryn O'Neill
- Department of Biology; University of New Brunswick; Saint John; New Brunswick; E2L 4L5; Canada
| | - Andrew Flewelling
- Department of Biology; University of New Brunswick; Saint John; New Brunswick; E2L 4L5; Canada
| | - Christopher M. Vogels
- Department of Chemistry and Biochemistry; Mount Allison University; Sackville; New Brunswick; E4L 1G8; Canada
| | - Andreas Decken
- Department of Chemistry; University of New Brunswick; Fredericton; New Brunswick; E3B 5A3; Canada
| | | | - Stephen A. Westcott
- Department of Chemistry and Biochemistry; Mount Allison University; Sackville; New Brunswick; E4L 1G8; Canada
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Geier MJ, Vogels CM, Decken A, Westcott SA. Acetylacetonato(phosphane)iridium Complexes: Synthesis and Catalytic Activity in the Cyclization of Alkynoic Acids. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.201000655] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Lillo V, Geier MJ, Westcott SA, Fernández E. Ni and Pd mediate asymmetric organoboron synthesis with ester functionality at the β-position. Org Biomol Chem 2009; 7:4674-6. [DOI: 10.1039/b909341a] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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