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Organocatalytic Enantioselective α-Bromination of Aldehydes with -Bromosuccinimide

Overview
Journal J Org Chem
Specialty Chemistry
Date 2022 May 26
PMID 35617931
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Abstract

Despite the wealth of existing organocatalytic, enantioselective transformations, the α-bromination of aldehydes remains a challenging reaction. The four examples reported to date require expensive, inconvenient brominating agents to achieve the desired products in excellent yields and enantioselectivities. The preferred brominating agent, -bromosuccinimide (NBS), has been repeatedly discarded for these reactions because it results in low yields and relatively poor enantioselectivities. We describe a methodology that uses NBS and performs excellently with low catalyst loadings, short reaction times, and mild temperatures.

References
1.
Donslund B, Johansen T, Poulsen P, Soholm Halskov K, Anker Jorgensen K . The Diarylprolinol Silyl Ethers: Ten Years After. Angew Chem Int Ed Engl. 2015; 54(47):13860-74. DOI: 10.1002/anie.201503920. View

2.
Melchiorre P, Marigo M, Carlone A, Bartoli G . Asymmetric aminocatalysis--gold rush in organic chemistry. Angew Chem Int Ed Engl. 2008; 47(33):6138-71. DOI: 10.1002/anie.200705523. View

3.
Steiner D, Mase N, Barbas 3rd C . Direct asymmetric alpha-fluorination of aldehydes. Angew Chem Int Ed Engl. 2005; 44(24):3706-10. DOI: 10.1002/anie.200500571. View

4.
Marigo M, Fielenbach D, Braunton A, Kjaersgaard A, Anker Jorgensen K . Enantioselective formation of stereogenic carbon-fluorine centers by a simple catalytic method. Angew Chem Int Ed Engl. 2005; 44(24):3703-6. DOI: 10.1002/anie.200500395. View

5.
Liang D, Luo R, Yin L, Chan A, Lu G . A new synthetic route for axially chiral secondary amines with binaphthyl backbone and their applications in asymmetric Michael reaction of aldehydes to nitroalkenes. Org Biomol Chem. 2012; 10(15):3071-9. DOI: 10.1039/c2ob07110j. View