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K Zaidan R, Evans P. Stereoselective synthesis of analogues of deoxyfebrifugine. JOURNAL OF CHEMICAL RESEARCH 2022. [DOI: 10.1177/17475198211047209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The preparation of six new optically active analogues of the natural product febrifugine (1) is reported. These analogues, lacking the hydroxy group from the natural product, were prepared from optically active N-protected S-pelletierine (7) and differ in terms of the specific quinazolinone portion included. The required S-7 (80% enantiomeric excess) was prepared from an asymmetric Mannich reaction between piperideine (8) and acetone in the presence of l-proline. The differently substituted quinazolinone used in this study (10a–10g) was either commercially available or was prepared from the corresponding substituted anthranilic acid and were installed via a bromination–alkylation sequence. N-Deprotection of the subsequent adducts (12a–12g) gave target compounds 13a–13f and completed the synthetic sequence.
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Affiliation(s)
- Raed K Zaidan
- Centre for Synthesis and Chemical Biology, School of Chemistry, University College Dublin, Dublin, Ireland
- Department of Chemistry, College of Science, University of Basra, Basra, Iraq
| | - Paul Evans
- Centre for Synthesis and Chemical Biology, School of Chemistry, University College Dublin, Dublin, Ireland
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Fischer P, Morris M, Müller-Bunz H, Evans P. Synthesis and Structural Elucidation of 1,2-Disubstituted 3-Fluoropiperidines. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000026] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Pauline Fischer
- Centre for Synthesis and Chemical Biology; School of Chemistry; University College Dublin; D04 N2E5 Dublin Ireland
| | - Morgan Morris
- Centre for Synthesis and Chemical Biology; School of Chemistry; University College Dublin; D04 N2E5 Dublin Ireland
| | - Helge Müller-Bunz
- Centre for Synthesis and Chemical Biology; School of Chemistry; University College Dublin; D04 N2E5 Dublin Ireland
| | - Paul Evans
- Centre for Synthesis and Chemical Biology; School of Chemistry; University College Dublin; D04 N2E5 Dublin Ireland
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Xu H, Yin W, Liang H, Nan Y, Qiu F, Jin Y. A Scalable Total Synthesis of Halofuginone. Org Process Res Dev 2019. [DOI: 10.1021/acs.oprd.9b00059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hua Xu
- Launch-Pharma Technologies, Ltd., 188 Kaiyuan Boulevard, Building D, Fifth Floor, Science Park of Guangzhou, Guangzhou 510530, China
| | - Wenhao Yin
- Launch-Pharma Technologies, Ltd., 188 Kaiyuan Boulevard, Building D, Fifth Floor, Science Park of Guangzhou, Guangzhou 510530, China
| | - Haoqiang Liang
- Launch-Pharma Technologies, Ltd., 188 Kaiyuan Boulevard, Building D, Fifth Floor, Science Park of Guangzhou, Guangzhou 510530, China
| | - Yanbo Nan
- Launch-Pharma Technologies, Ltd., 188 Kaiyuan Boulevard, Building D, Fifth Floor, Science Park of Guangzhou, Guangzhou 510530, China
| | - Fayang Qiu
- Launch-Pharma Technologies, Ltd., 188 Kaiyuan Boulevard, Building D, Fifth Floor, Science Park of Guangzhou, Guangzhou 510530, China
| | - Yehua Jin
- Launch-Pharma Technologies, Ltd., 188 Kaiyuan Boulevard, Building D, Fifth Floor, Science Park of Guangzhou, Guangzhou 510530, China
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