The synthesis of symmetrical (2-indolyl)ethynes and reduced congeners<i>via</i>palladium-catalyzed couplings of 2-bromoindole precursors
作者:Anthony D. Sercel、H. D. Hollis Showalter
DOI:10.1002/jhet.5570430326
日期:2006.5
two-carbon linker followed by desilylation and further coupling with starting 2-bromoindole. A second shorter and more efficient route engaged the starting 2-bromoindole in a double Stille coupling with bis(tributylstannyl) acetylene or (E)-1,2-bis(tributylstannyl)ethylene to provide desired homodimers in onestep. Subsequent transformations of dimeric intermediates led to target acids 7a-c and derived amides