Nickel-catalyzed ring-opening of α-hydroxycyclobutenones with a remarkable ligand effect
作者:Songsong Gao、Xiangdong Hu
DOI:10.1039/c7cc03340k
日期:——
A Ni-catalyzed ring-opening of α-hydroxycyclobutenones is reported herein. A remarkable ligand effect was observed during transformations following the ring-opening. The employment of PPh3 leads to the formation of 2-furanones 2 through a migration of an alkoxyl group, and 2-furanones 3 were generated through a migration of hydrogen in the presence of Xantphos, affording a divergent approach to 2-furanones
3-Stannylcyclobutenediones as nucleophilic cyclobutenedione equivalents. Synthesis of substituted cyclobutenediones and cyclobutenedione monoacetals and the beneficial effect of catalytic copper iodide on the Stille reaction
作者:Lanny S. Liebeskind、Richard W. Fengl
DOI:10.1021/jo00306a012
日期:1990.9
Regioselective Synthesis of Highly Substituted Naphthols
作者:Philip Turnbull、Harold W. Moore
DOI:10.1021/jo00108a029
日期:1995.2
2,3,4-Trisubstituted 4-hydroxy-2-cyclobutenones, prepared by regiospecific synthesis of substituted cyclobutenediones, undergo Lewis acid facilitated ionization to cyclobutenyl cations, which are trapped by trialkylsilanes in a regioselective sense. Thermolysis of the resulting cyclobutenones affords phenols in high yields.
LIEBESKIND, LANNY S.;FENGL, RICHARD W., J. ORG. CHEM., 55,(1990) N9, C. 5359-5364