Direct formation of cyclobutenylphosphonates from 1-alkynylphosphonates and Cp2ZrCl2/2EtMgCl/2CuCl
摘要:
Zirconacycles 2 prepared from 1-alkynylphosphonates 1, zirconocene dichloride, and 2 equiv of EtMgCl are smoothly converted into cyclobutenylphosphonates 3 when treated with two equiv of CuCl in 65-81% isolated yield. The reaction is specific and general only for zirconacyclopentenyl phosphonates. (C) 2008 Elsevier Ltd. All rights reserved.
Direct formation of cyclobutenylphosphonates from 1-alkynylphosphonates and Cp2ZrCl2/2EtMgCl/2CuCl
作者:Yulia Sinelnikove、Abraham Rubinstein、Morris Srebnik、Abed Al Aziz Al Quntar
DOI:10.1016/j.tetlet.2008.11.108
日期:2009.2
Zirconacycles 2 prepared from 1-alkynylphosphonates 1, zirconocene dichloride, and 2 equiv of EtMgCl are smoothly converted into cyclobutenylphosphonates 3 when treated with two equiv of CuCl in 65-81% isolated yield. The reaction is specific and general only for zirconacyclopentenyl phosphonates. (C) 2008 Elsevier Ltd. All rights reserved.