NHC-catalyzed chemoselective reactions of enals and aminobenzaldehydes for access to chiral dihydroquinolines

An N-heterocyclic carbene (NHC)-catalyzed reaction between α-bromoenals and 2-aminoaldehydes has been developed. Key steps include chemoselective reaction of the NHC catalyst with one of the aldehyde substrates (the bromoenal) to eventually generate an α,β-unsaturated acylazolium intermediate. Addit...

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Main Authors: Wu, Shuquan, Liu, Changyi, Luo, Guoyong, Jin, Zhichao, Zheng, Pengcheng, Chi, Robin Yonggui
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2020
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Online Access:https://hdl.handle.net/10356/137827
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spelling sg-ntu-dr.10356-1378272023-02-28T19:47:19Z NHC-catalyzed chemoselective reactions of enals and aminobenzaldehydes for access to chiral dihydroquinolines Wu, Shuquan Liu, Changyi Luo, Guoyong Jin, Zhichao Zheng, Pengcheng Chi, Robin Yonggui School of Physical and Mathematical Sciences Science::Chemistry::Organic chemistry Chemoselectivity Dihydroquinolines An N-heterocyclic carbene (NHC)-catalyzed reaction between α-bromoenals and 2-aminoaldehydes has been developed. Key steps include chemoselective reaction of the NHC catalyst with one of the aldehyde substrates (the bromoenal) to eventually generate an α,β-unsaturated acylazolium intermediate. Addition of the nitrogen atom of aminoaldehyde to the unsaturated azolium ester intermediate followed by intramolecular aldol reaction, β-lactone formation, and decarboxylation leads to chiral dihydroquinolines with high optical purity. The dihydroquinoline products, which are quickly prepared by using this method, can be readily transformed into a diverse set of functional molecules such as pyridines and chiral piperidines. NRF (Natl Research Foundation, S’pore) ASTAR (Agency for Sci., Tech. and Research, S’pore) MOE (Min. of Education, S’pore) Accepted version 2020-04-15T11:01:24Z 2020-04-15T11:01:24Z 2019 Journal Article Wu, S., Liu, C., Luo, G., Jin, Z., Zheng, P., & Chi, R. Y. (2019). NHC-catalyzed chemoselective reactions of enals and aminobenzaldehydes for access to chiral dihydroquinolines. Angewandte Chemie International Edition, 58(51), 18410-18413. doi:10.1002/anie.201909479 1433-7851 https://hdl.handle.net/10356/137827 10.1002/anie.201909479 31604001 2-s2.0-85074789794 51 58 18410 18413 en Angewandte Chemie International Edition This is the peer reviewed version of the following article: Wu, S., Liu, C., Luo, G., Jin, Z., Zheng, P., & Chi, R. Y. (2019). NHC-catalyzed chemoselective reactions of enals and aminobenzaldehydes for access to chiral dihydroquinolines. Angewandte Chemie International Edition, 58(51), 18410-18413, which has been published in final form at https://doi.org/10.1002/anie.201909479. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Science::Chemistry::Organic chemistry
Chemoselectivity
Dihydroquinolines
spellingShingle Science::Chemistry::Organic chemistry
Chemoselectivity
Dihydroquinolines
Wu, Shuquan
Liu, Changyi
Luo, Guoyong
Jin, Zhichao
Zheng, Pengcheng
Chi, Robin Yonggui
NHC-catalyzed chemoselective reactions of enals and aminobenzaldehydes for access to chiral dihydroquinolines
description An N-heterocyclic carbene (NHC)-catalyzed reaction between α-bromoenals and 2-aminoaldehydes has been developed. Key steps include chemoselective reaction of the NHC catalyst with one of the aldehyde substrates (the bromoenal) to eventually generate an α,β-unsaturated acylazolium intermediate. Addition of the nitrogen atom of aminoaldehyde to the unsaturated azolium ester intermediate followed by intramolecular aldol reaction, β-lactone formation, and decarboxylation leads to chiral dihydroquinolines with high optical purity. The dihydroquinoline products, which are quickly prepared by using this method, can be readily transformed into a diverse set of functional molecules such as pyridines and chiral piperidines.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Wu, Shuquan
Liu, Changyi
Luo, Guoyong
Jin, Zhichao
Zheng, Pengcheng
Chi, Robin Yonggui
format Article
author Wu, Shuquan
Liu, Changyi
Luo, Guoyong
Jin, Zhichao
Zheng, Pengcheng
Chi, Robin Yonggui
author_sort Wu, Shuquan
title NHC-catalyzed chemoselective reactions of enals and aminobenzaldehydes for access to chiral dihydroquinolines
title_short NHC-catalyzed chemoselective reactions of enals and aminobenzaldehydes for access to chiral dihydroquinolines
title_full NHC-catalyzed chemoselective reactions of enals and aminobenzaldehydes for access to chiral dihydroquinolines
title_fullStr NHC-catalyzed chemoselective reactions of enals and aminobenzaldehydes for access to chiral dihydroquinolines
title_full_unstemmed NHC-catalyzed chemoselective reactions of enals and aminobenzaldehydes for access to chiral dihydroquinolines
title_sort nhc-catalyzed chemoselective reactions of enals and aminobenzaldehydes for access to chiral dihydroquinolines
publishDate 2020
url https://hdl.handle.net/10356/137827
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