A convenient method for the preparation of α-vinylfurans by phosphine-initiated reactions of various substituted enynes bearing a carbonyl group with aldehydes
作者:Hirofumi Kuroda、Emi Hanaki、Hironori Izawa、Michiko Kano、Hiromi Itahashi
DOI:10.1016/j.tet.2003.12.034
日期:2004.2
at the ene end in the presence of various aldehydes, in moderate to high yields. The reaction may consist of 1,6-addition of phosphine to the enynes, ring closure, and Wittig reaction between the ylid resulting from cyclization and an aldehyde. Thus, various aldehydes were able to be used in the reaction. The reaction was influenced greatly by the substituents at the acetylene position (R1) and the α-position
α-乙烯基呋喃是通过在各种醛存在下,通过膦引发的烯键末端带有羰基的各种烯炔的膦化引发的环化反应而制得的,产率中等至高。该反应可以包括将1,6-膦添加到烯炔上,闭环,以及由环化产生的基团和醛之间的Wittig反应。因此,各种醛能够用于反应中。该反应受到乙炔位置(R 1)和羰基的α位置(R 3)上的取代基的影响很大。