Highly Regioselective and <i>E</i>/<i>Z</i>-Selective Hydroalkylation of Ynone, Ynoate, and Ynamide via Photoredox Mediated Ni/Ir Dual Catalysis
作者:Su Yong Go、Geun Seok Lee、Soon Hyeok Hong
DOI:10.1021/acs.orglett.8b02017
日期:2018.8.3
Exclusively α- and highly E/Z-selective hydroalkylation of ynone, ynoate, and ynamide was achieved via photoredox mediated Ni/Ir dual catalysis with high atom and step economy, producing trisubstituted enones, which are versatile synthetic building blocks. The developed reaction selectively delivered the α/Z isomer, which is complementary to the previously reported β-alkylation processes. The trisubstituted
The reaction of alkenylsilanes with ozone provides synthetically versatile β-hydroxy or α-formyl silyl peroxides in good yield without normal fission of the C=C bond. The obtained α-formyl silyl peroxides serve as good precursors for the stereochemically defined diol or triol derivatives via nucleophilic addition to the formyl group and reduction of the peroxide moiety.
作者:Linlin Ding、Yue Zhao、Hongjian Lu、Zhuangzhi Shi、Minyan Wang
DOI:10.1002/anie.202313655
日期:2024.1.2
enantioselective propargyl-aryl cross-coupling between two electrophiles was achieved for the first time in a stereoconvergent manner. The potential utility of this conversion is demonstrated in the facile construction of stereoenriched bioactive molecule derivatives and medicinal compounds based on the diversity of acetylenic chemistry. Detailed experimental studies have revealed the key mechanistic features of this