作者:Anthony J. Giessert、Lee Snyder、Jordan Markham、Steven T. Diver
DOI:10.1021/ol034459k
日期:2003.5.1
[GRAPHICS]A new intermolecular metathesis between a variety of alkynes and alkyl enol ethers is described. The best results were obtained with the second generation Grubbs' precatalysts. The reaction occurred with a high degree of regioselectivity and provided electron-rich dienes, which underwent a variety of [4 + 2] cycloadditions.
Expanded Scope in Ethylene−Alkyne Cross-Metathesis: Coordinating Heteroatom Functionality at the Propargylic Position
作者:Jason A. Smulik、Steven T. Diver
DOI:10.1021/ol006035l
日期:2000.7.1
[GRAPHICS]The Grubbs 1,3-dimesityl-4,5-dihydroimidazol-2-ylidene-substituted ruthenium complex 1 catalyzed ethylene-alkyne cross-metathesis and was shown to tolerate free hydroxyl groups and coordinating functionality at the propargylic and homopropargylic positions, Hindered and enantiomerically enriched 1-substituted alkynes also react efficiently under the reported conditions.