Access to functionalized cyclopropylcarbinyl compounds from homoallylic ethers via zirconocene intermediates
摘要:
Cyclopropylcarbinylzirconium complexes were generated from homoallylic ethers and zirconocene (CP2ZrCl2/2n-BuLi). They underwent further in situ transformations that is, bromination-substitution, transmetallation-functionalization and insertion reactions to afford various cyclopropylcarbinyl derivatives. In contrast, ring-opening products could be selectively obtained by treating the zirconium complex with MeLi, prior to functionalization. (C) 2004 Elsevier Ltd. All rights reserved.