Gold Catalysis: Mild Conditions for the Transformation of Alkynyl Epoxides to Furans
作者:A. Stephen K. Hashmi、Pradipta Sinha
DOI:10.1002/adsc.200303201
日期:2004.3
Gold(III) chloride catalyzes the isomerization of alkynylepoxides to furans under mildconditions. Additional functional groups like hydroxy groups or aryl bromides do not need to be protected.
Catalytic cascade hydroalkoxylation/isomerization/[4 + 2] cycloaddition using enyne alcohols as latent dienes or dienophiles
作者:Rui Guo、Kang-Nan Li、Liu-Zhu Gong
DOI:10.1039/c3ob41611a
日期:——
Enyne alcohols can react as precursors of either dienes or dienophiles with different substrates after hydroxylation and isomerization by gold catalysis. As such, oxa-bridged tricyclo[5.2.2.02,6]-undec-8-ene-3,5-dione derivatives have been obtained by the Diels–Alder reaction and tetrahydro-1H-furo[3,4-c]pyran derivatives could be accessed by the hetero-Diels–Alder cycloaddition.