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Catalyst-free nitration of the aliphatic C[sbnd]H bonds of tertiary β-keto esters with tert-butyl nitrite: Access to α-quaternary α-amino acid precursors.
- Source :
-
Tetrahedron Letters: International Organ for the Rapid Publication of Preliminary Communications in Organic Chemistry . Jun2022, Vol. 99, pN.PAG-N.PAG. 1p. - Publication Year :
- 2022
-
Abstract
- An efficient catalyst-free direct nitration of the aliphatic hydrocarbon bonds of tertiary β-keto ethers using tert- butyl nitrite as a nitrating reagent is described. This radical nitration protocol tolerants diverse functional groups, leading to the preparation of linear and cyclic α-nitro-β-keto ester derivatives in good to excellent yields under mild conditions. In addition, the nitration product 3a was applied to the concise synthesis of α-quaternary α-amino acid ether 4 in the presence of zinc power and acetic acid. [Display omitted] An efficient catalyst-free direct nitration of the C H bonds of tertiary β-keto esters using tert- butyl nitrite as a nitrating reagent is described. This radical nitration protocol tolerants diverse functional groups, leading to the preparation of linear and cyclic α-nitro-β-keto ester derivatives in good to excellent yields under mild conditions. In addition, the nitration product 3a was applied to the concise synthesis of α-quaternary α-amino acid 4 in the presence of zinc power and acetic acid. [ABSTRACT FROM AUTHOR]
- Subjects :
- *NITRATION
*ESTER derivatives
*ESTERS
*NITRITES
*ACETIC acid
*ALIPHATIC alcohols
Subjects
Details
- Language :
- English
- ISSN :
- 00404039
- Volume :
- 99
- Database :
- Academic Search Index
- Journal :
- Tetrahedron Letters: International Organ for the Rapid Publication of Preliminary Communications in Organic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 157119155
- Full Text :
- https://doi.org/10.1016/j.tetlet.2022.153844