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。
Improved synthesis of 8-oxabicyclo[3.2.1]octanes <i>via</i> tandem C–H oxidation/oxa-[3,3] Cope rearrangement/aldol cyclization
作者:Lin Liu、Hai-Long Cheng、Wen-Qiang Ma、Si-Hua Hou、Yong-Qiang Tu、Fu-Min Zhang、Xiao-Ming Zhang、Shao-Hua Wang
DOI:10.1039/c7cc08511g
日期:——
A tandem C–H oxidation/oxa-[3,3] Cope rearrangement/aldol reaction of allylic silylethers promoted by T+BF4−(tempo oxoammonium tetrafluoroborate)/ZnBr2 has been successfully developed allowing the efficient construction of 8-oxabicyclo[3.2.1]octanes and their analogs with a wide substrate scope.