Synthesis of 2-dimethylamino-3-hetaryl-5-hydroxybenzofurans by the nenitzescu route from nitro-containing enamines of the benzofuran series
作者:T. I. Mukhanova、L. M. Alekseeva、V. G. Granik
DOI:10.1007/bf02269537
日期:2000.4
Synthesis of pyridines with an amino acid residue by [2+2] cycloadditions of electron-poor acetylenes on enaminone systems derived from N-Boc protected amino acids
作者:Benjamin Prek、Jure Bezenšek、Branko Stanovnik
DOI:10.1016/j.tet.2017.07.019
日期:2017.8
In this paper we present a pyridine synthesis, starting from N-protected amino acids. Amino acids are firstly converted to an ynone system, which is later converted to an enaminone system. Following a formal [2 + 2] cycloaddition of electron poor acetylenes and subsequent ring closure the final products are pyridines bearing an amino-acid substituent.
KIO<sub>3</sub>-Mediated γ-C(sp<sup>3</sup>)–H Sulfenylation of Enaminones
作者:Yu Zheng、Zhi-Wei Liu、Tao Li、Xian Li、Sheng-Hong Li
DOI:10.1021/acs.orglett.2c02824
日期:2022.10.21
A metal-free regioselective γ-C(sp3)–H sulfenylation of enaminones with heterocyclic thiols is reported. This transformation is efficient, mild, scalable, and environmentally friendly and tolerates a large variety of enaminones substrates and heterocyclic thiols. The utility of this strategy is demonstrated in a late-stage modification of bioactive natural products and drug derivatives.