Pt(II) or Ag(I) Salt Catalyzed Cycloisomerizations and Tandem Cycloadditions Forming Functionalized Azacyclic Arrays
摘要:
Cyclic ene-N-p-toluenesulfonamides tethered to an electron-deficient alkyne undergo cycloisomerizations readily under the influence of catalytic Pt(II) salts (PtCl2 or [dppbPtmu-OH](2)(BF4)(2)) or AgOTf. Yields for this process range from 47% to 99%. The resulting functionalized 2-azahydrindans can be reacted further using the Diels-Alder reaction. Tandem cycloisomerization-cycloaddition reactions in one pot generate highly functionalized 1-azadecalin ring systems in a highly stereocontrolled manner.
Pt(II) or Ag(I) Salt Catalyzed Cycloisomerizations and Tandem Cycloadditions Forming Functionalized Azacyclic Arrays
摘要:
Cyclic ene-N-p-toluenesulfonamides tethered to an electron-deficient alkyne undergo cycloisomerizations readily under the influence of catalytic Pt(II) salts (PtCl2 or [dppbPtmu-OH](2)(BF4)(2)) or AgOTf. Yields for this process range from 47% to 99%. The resulting functionalized 2-azahydrindans can be reacted further using the Diels-Alder reaction. Tandem cycloisomerization-cycloaddition reactions in one pot generate highly functionalized 1-azadecalin ring systems in a highly stereocontrolled manner.
Pt(II) or Ag(I) Salt Catalyzed Cycloisomerizations and Tandem Cycloadditions Forming Functionalized Azacyclic Arrays
作者:Tyler J. Harrison、Gregory R. Dake
DOI:10.1021/ol047696b
日期:2004.12.1
Cyclic ene-N-p-toluenesulfonamides tethered to an electron-deficient alkyne undergo cycloisomerizations readily under the influence of catalytic Pt(II) salts (PtCl2 or [dppbPtmu-OH](2)(BF4)(2)) or AgOTf. Yields for this process range from 47% to 99%. The resulting functionalized 2-azahydrindans can be reacted further using the Diels-Alder reaction. Tandem cycloisomerization-cycloaddition reactions in one pot generate highly functionalized 1-azadecalin ring systems in a highly stereocontrolled manner.