作者:Kenneth Robert Huffman、Martin Burger、William A. Henderson、M. Loy、E. F. Ullman
DOI:10.1021/jo01260a033
日期:1969.8
Phase Transfer Reagent Promoted Tandem Ring-Opening and Ring-Closing Reactions of Unique 3-(1-Alkynyl) Chromones
作者:Yang Liu、Shiyu Jin、Liping Huang、Youhong Hu
DOI:10.1021/acs.orglett.5b00721
日期:2015.5.1
promoted tandem ring-opening and ring-closing reaction of 3-(1-alkynyl) chromones has been developed. This process remarkably generates functionalized 3-acyl-2-substituted chromones. Interestingly, when 3-(hepta-1,6-diyn-1-yl)chromone derivatives are applied, a novel tetracyclic chromone scaffold can be obtained by a further intramolecular 4 + 2 cyclization.