Synthesis of cyclic allyl vinyl ethers using Pt(II)-catalyzed isomerization of oxo-alkynes
作者:Zezhou Wang、Xi Lin、Rudy L. Luck、Garrett Gibbons、Shiyue Fang
DOI:10.1016/j.tet.2009.01.065
日期:2009.3
Several alkynyl epoxides and one alkynyl allyl alcohol were isomerized to cyclic allylvinylethers (3,4-dihydro-2H-1,4-oxazines) using PtCl2 as the catalyst. Three of these allylvinylethers were converted to 2-hydroxymorpholine derivatives by hydrolysis and two were converted to piperidine derivatives by thermal Claisenrearrangement.
使用PtCl 2作为催化剂,将几种炔基环氧化物和一种炔基烯丙醇异构化为环状烯丙基乙烯基醚(3,4-二氢-2 H -1,4-恶嗪)。这些烯丙基乙烯基醚中的三种通过水解转化为2-羟基吗啉衍生物,而两种通过热克莱森重排转化为哌啶衍生物。
AgOTf-Catalyzed Cycloisomerization of Alkynyl Oxiranes for Dihydro-1,4-oxazine Synthesis
作者:Eun Kang、Muchchintala Maheswara、Yun Lee
DOI:10.1055/s-0031-1290466
日期:——
The efficient AgOTf-catalyzed isomerization reactions of various alkynyl oxiranes and alkynyl allyl alcohols were carried out at room temperature with moderate to good yields. This is an economical and mild method for the construction of O-heterocyclic compounds.