N-carbamate protected amino acid derived guanidine organocatalysts
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In: Tetrahedron, Vol. 89, 132093, 04.06.2021.
Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - N-carbamate protected amino acid derived guanidine organocatalysts
AU - Al-Taie, Zahraa S.
AU - Anderson, Joseph M.
AU - Bischoff, Laura
AU - Christensen, Jeppe
AU - Coles, Simon J.
AU - Froom, Richard
AU - Gibbard, Mari E.
AU - Jones, Leigh F.
AU - de Kleijne, Frank F. J.
AU - Murphy, Paddy
AU - Thompson, Emma
PY - 2021/6/4
Y1 - 2021/6/4
N2 - We report the preparation of a range of N-protected amino acid derived guanidine organocatalysts and their application to the Michael addition of 2-hydroxy-1,4-napthoquinone to β-nitrostyrene, achieving a maximum ee of 26%. Whilst these catalysts gave poor ees, the structural variation together with the X-ray crystallographic study of the intra- and intermolecular hydrogen bonding reported suggest that the C2-symmetric catalysts are lead compounds for the further development of this methodology.
AB - We report the preparation of a range of N-protected amino acid derived guanidine organocatalysts and their application to the Michael addition of 2-hydroxy-1,4-napthoquinone to β-nitrostyrene, achieving a maximum ee of 26%. Whilst these catalysts gave poor ees, the structural variation together with the X-ray crystallographic study of the intra- and intermolecular hydrogen bonding reported suggest that the C2-symmetric catalysts are lead compounds for the further development of this methodology.
KW - Amino acids
KW - Guanidines
KW - H-bonded extended networks
KW - Organocatalysis
U2 - 10.1016/j.tet.2021.132093
DO - 10.1016/j.tet.2021.132093
M3 - Article
VL - 89
JO - Tetrahedron
JF - Tetrahedron
SN - 0040-4020
M1 - 132093
ER -