Chinese Journal of Organic Chemistry >
Ag-Catalyzed Reactions of 3-Trifluoroacetyl Indoles and Isocyano- acetates: An Efficient Process to (Z)-β-Trifluoromethylated Dehydrotryptophan Derivatives
Received date: 2020-08-13
Revised date: 2020-09-06
Online published: 2020-09-22
Supported by
the National Natural Science Foundation of China(21572126); the National Natural Science Foundation of China(21901152); the National Natural Science Foundation of China(U1904195); the Key Scientific and Technological Project of Henan Province(202102310003); the Key Scientific and Technological Project of Henan Province(192102210161); the Science and Technology Innovation Talents of Henan Province(2018JQ0011)
Catalytic cyclization-rearrangement reaction of 3-trifluoroacetyl indole and isocyanoacetate was achieved with AgOAc as catalyst in mild conditions. A serious of β-trifluoromethylated dehydrotryptophan derivatives were obtained with single Z-isomer in excellent yields (up to >99% yields). The large scale experiment proceeded smothly genereting desired products in up to 98% isolated yield, which demostrated the practicality of the method. The plausible mechanism was aslo proposed. This transformation has features of high atom economy, mild reaction condition and easy operation.
Key words: 3-trifluoroacetyl indole; isocyanoacetate; dehydrotryptophan
Mingliang Zhang , Pin Zhao , Hao Yuan , An'an Zhang , Wenyu Zhang , Linlin Zheng , Dongqing Wu , Lantao Liu . Ag-Catalyzed Reactions of 3-Trifluoroacetyl Indoles and Isocyano- acetates: An Efficient Process to (Z)-β-Trifluoromethylated Dehydrotryptophan Derivatives[J]. Chinese Journal of Organic Chemistry, 2021 , 41(2) : 669 -676 . DOI: 10.6023/cjoc202008023
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