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Barker TJ, Bogatkevich A, Crowder DW, Gierszal SG, Hayes JC, Hollerbach MR, Russell RW. Reactions of Benzylboronate Nucleophiles. SYNTHESIS-STUTTGART 2023; 55:2639-2647. [PMID: 37790600 PMCID: PMC10545366 DOI: 10.1055/a-2072-2754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
This short review summarizes our laboratory's development of benzylboronic esters as nucleophiles. Activation of the benzylboronic ester is achieved by irreversible coordination of an alkyllithium Lewis base to form a nucleophilic benzylboronate. This boronate was found to react with aldehydes, imines, ketones and alkyl bromides. A copper catalyst was employed in reactions of the boronate with epoxides and aziridines.
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Affiliation(s)
- Timothy J Barker
- College of Charleston, Department of Chemistry and Biochemistry, 66 George St., Charleston, SC
| | - Andrew Bogatkevich
- College of Charleston, Department of Chemistry and Biochemistry, 66 George St., Charleston, SC
| | - Dallas W Crowder
- College of Charleston, Department of Chemistry and Biochemistry, 66 George St., Charleston, SC
| | - Sophia G Gierszal
- College of Charleston, Department of Chemistry and Biochemistry, 66 George St., Charleston, SC
| | - Jacob C Hayes
- College of Charleston, Department of Chemistry and Biochemistry, 66 George St., Charleston, SC
| | - Michael R Hollerbach
- College of Charleston, Department of Chemistry and Biochemistry, 66 George St., Charleston, SC
| | - Richard W Russell
- College of Charleston, Department of Chemistry and Biochemistry, 66 George St., Charleston, SC
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Lee J, Ju X, Lee M, Jiang Q, Jang H, Kim WS, Wu L, Williams S, Wang XJ, Zeng X, Payne J, Han ZS. Copper Catalyzed Regioselective and Stereospecific Aziridine Opening with Pyridyl Grignard Nucleophiles. Org Lett 2022; 24:2655-2659. [PMID: 35377668 DOI: 10.1021/acs.orglett.2c00703] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Copper catalyzed regioselective and stereospecific coupling between aziridines and in situ generated pyridine Grignard reagents is reported. This method provides β-pyridylethylamines with diverse structures and functionalities from aziridines and iodopyridines. β-Pyridylethylamines are potential scaffolds for the synthesis of biologically active compounds often found in pharmaceuticals. The synthesis of challenging chiral dihydroazaindoles was also achieved through mild one-pot reaction conditions via aziridine opening followed by nucleophilic cyclization.
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Affiliation(s)
- Jaehee Lee
- Department of Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877-0368, United States
| | - Xuan Ju
- Department of Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877-0368, United States
| | - Miseon Lee
- Department of Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877-0368, United States
| | - Qi Jiang
- Department of Material and Analytical Sciences, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877-0368, United States
| | - Hwanjong Jang
- Department of Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877-0368, United States
| | - Wan Shin Kim
- Department of Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877-0368, United States
| | - Linglin Wu
- Department of Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877-0368, United States
| | - Suja Williams
- Department of Material and Analytical Sciences, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877-0368, United States
| | - Xiao-Jun Wang
- Department of Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877-0368, United States
| | - Xingzhong Zeng
- Department of Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877-0368, United States
| | - Jenna Payne
- Department of Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877-0368, United States
| | - Zhengxu S Han
- Department of Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877-0368, United States
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