Surface‐Plasmon‐Enhanced Transmetalation between Copper and Palladium Nanoparticle Catalyst
作者:Xin Liu、Yujian Shi、Yichao Jin、Tana Tana、Erandi Peiris、Xueming Zhang、Feng Xu、Eric R. Waclawik、Steven E. Bottle、Huaiyong Zhu、Sarina Sarina
DOI:10.1002/anie.202203158
日期:2022.6.13
The localized surfaceplasmon resonance effect of Cu nanoparticlesenhancestransmetalation and phenylacetylide intermediate transfer from the Cu surface to the Pd surface by low-flux visible light. This feature enables a choice between the cross-coupling product and homo-coupling product dependent on wavelength.
novel intramolecularhydroacylation of 5- and 6-alkynals leading to alpha-alkylidenecycloalkanones was accomplished by using cationic a rhodium(I)/BINAP complex. For all cyclizations described, a single (E)-olefin isomer was obtained. At elevated temperature, hydroacylation and double bond migration of 5- and 6-alkynals proceeded in a one-pot reaction to give cycloalkenones. An intramolecular hydroacylation
The combined use of a catalytic amount of InX3 (X = OTf and NTf2) and 1-butanol was found to be effective in formal alkyne–aldehyde metathesis. With this catalytic system, aromatic alkynes reacted with aromatic aldehydes to give chalcones in moderate to good yields. Alkynals were efficiently converted into 5- to 7-membered cyclic compounds by intramolecular alkyne–aldehyde coupling.