Highly Selective Synthetic Method for 1,6-Diols Bearing Enyne Functions: Development of 3,6-Dianion Reagent of 1,2-Hexadien-4-yne Using 1,6-Dibromo-2,4-hexadiyne and Indium
作者:Sundae Kim、Kooyeon Lee、Dong Seomoon、Phil Ho Lee
DOI:10.1002/adsc.200700309
日期:2007.11.5
with an organoindium reagent generated in situ from indium and 1,6-dibromo-2,4-hexadiyne in the presence of lithium iodide in tetrahydrofuran (THF) selectively produced 1,6-diols linked to an allenyne unit with complete regioselectivity and chemoselectivity through 1,2-hexadien-4-yn-3,6-ylation, indicating that the organoindium acted as the 3,6-dianionreagent of 1,2-hexadien-4-yne.
Cyclization of Allenyne-1,6-diols Catalyzed by Gold and Silver Salts: An Efficient Selective Synthesis of Dihydrofuran and Furan Derivatives
作者:Sundae Kim、Phil Ho Lee
DOI:10.1002/adsc.200700471
日期:2008.3.7
Treatment of allenyne-1,6-diols with gold and silver catalysts selectively produced 2,5-dihydrofuran and furanderivatives, respectively, in good to excellent yields through the selective activation and differentiation of the double and triple bonds in allenyne-1,6-diols. It is noteworthy that the chemoselectivity is clearly switched by simply changing the metal from gold to silver.