Direct Copper‐Free Domino Conjugate Addition‐Cycloallylation using Organozinc Reagents
作者:Venukrishnan Komanduri、Fernando Pedraza、Michael J. Krische
DOI:10.1002/adsc.200800242
日期:2008.7.7
The Direct Approach: Enones possessing appendant allylic carbonates react directly with diorganozinc reagents in the presence of zinc diiodide [ZnI(2)] to provide 5- and 6-membered ring products of tandem or dominoconjugate addition-cycloallylation in good to excellent yield. In a related copper-free transformation, allylic carbonates are found to engage in direct allylic substitution with diorganozinc