Synthesis of 2,3-Dialkylated Tartaric Acid Esters
via Visible Light Photoredox-Catalyzed Reductive Dimerization of α‑Ketoesters
Posted on 2017-08-18 - 08:14
A mild transition-metal-free
protocol to prepare 2,3-dialkylated
tartaric acid esters has been developed by taking advantage of a visible
light photoredox-catalyzed reductive dimerization of α-ketoesters
with a combination of an organic dye photocatalyst and a Hantzsch-type
1,4-dihydropyridine hydrogen donor. A broad range of functional groups
including cyclopropane, alkene, alkyne, 4-methoxybenzyl ether, acetal,
silyl ether, carbamate, cyclic ether, cyclic thioether, bromoalkane,
and N-alkoxyphthalimide are well-compatible. By employing
the visible light photoredox-catalyzed reductive coupling and the
subsequent optical resolution, both enantioenriched diastereomers
of 2,3-dialkylated tartaric acid could be acquired conveniently.
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Zhu, Jing; Yuan, Yi; Wang, Shaozhong; Yao, Zhu-Jun (2017). Synthesis of 2,3-Dialkylated Tartaric Acid Esters
via Visible Light Photoredox-Catalyzed Reductive Dimerization of α‑Ketoesters. ACS Publications. Collection. https://doi.org/10.1021/acsomega.7b00749
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AUTHORS (4)
JZ
Jing Zhu
YY
Yi Yuan
SW
Shaozhong Wang
ZY
Zhu-Jun Yao
KEYWORDS
Visible Light Photoredox-Catalyzed Reductive Dimerizationenantioenriched diastereomerslight photoredox-catalyzed reductive dimerizationsilyl ether4- methoxybenzyl etheracidtartariccyclic thioetherα- ketoesterslight photoredox-catalyzed reductivedye photocatalystcyclic ethertransition-metal-free protocoldialkylated