作者:Sape S. Kinderman、Robin Doodeman、Jetze W. van Beijma、Jaap C. Russcher、Kim C. M. F. Tjen、T. Martijn Kooistra、Homayun Mohaselzadeh、Jan H. van Maarseveen、Henk Hiemstra、Hans E. Schoemaker、Floris P. J. T. Rutjes
DOI:10.1002/1615-4169(200208)344:6/7<736::aid-adsc736>3.0.co;2-8
日期:2002.8
A variety of allylic O,O -a ndN,O-acetals were synthesized using a mild palladium-catalyzed coupling of an alcohol or sulfonamide with an alkyl or aryl 1,2-propadienyl ether. The resulting linear acetals were used for the synthesis of unsaturated rings via ring-closing metathesis, in which the acetal carbon ± a precursor for oxycarbenium or N-sulfonyliminium ions, respectively ± served as a reactive
使用醇或磺酰胺与烷基或芳基 1,2-丙二烯基醚的温和钯催化偶联合成了各种烯丙基 O,O -a ndN,O-缩醛。所得线性缩醛用于通过闭环复分解合成不饱和环,其中缩醛碳±氧碳鎓或 N-磺酰亚胺鎓离子的前体分别±充当进一步引入官能团的反应中心。产物——不饱和氧和氮杂环支架——为衍生提供了多种机会,如取代二氢吡喃、色烯、对映体纯四氢吡啶和对映体纯的喹啉氨基酸的合成所示。