Regioselectivity Control in a Ruthenium-Catalyzed Cycloisomerization of Diyne-ols
作者:Barry M. Trost、Michael T. Rudd、Moisés Gulías Costa、Philip I. Lee、Andrew E. Pomerantz
DOI:10.1021/ol048351w
日期:2004.11.1
ruthenium-catalyzed cycloisomerization of diynes containing one silyl alkyne and one propargyl alcohol yields 2-silyl-[6H]-pyrans instead of the expected unsaturated acylsilanes except when additional conjugation of a aromatic ring is present at the delta-position. Under certain conditions, a facile ruthenium-catalyzed isomerization of the product takes place as well. This regioselectivity of the cyclization