Enantioselective Friedel–Crafts alkylation of indoles with 2-enoylpyridine-N-oxides catalyzed by glucoBOX-Cu(ii) complex
作者:Jimil George、B. V. Subba Reddy
DOI:10.1039/c2ob25315a
日期:——
glucosamine derived glucoBOX-Cu(II) complex was found to be a unique catalytic system for enantioselectiveFriedel–Craftsalkylation of indoles with 2-enoylpyridine-1-oxides. A large number of 3-alkylated indole derivatives were prepared using 5 mol% glucoBOX-Cu(II) complex in excellent yields with high enantioselectivity up to 99% ee.
Enantioselective Friedel−Crafts Alkylation of Pyrroles Catalyzed by PYBOX-DIPH-Zn(II) Complexes
作者:Pradeep K. Singh、Vinod K. Singh
DOI:10.1021/ol902360b
日期:2010.1.1
A highly enantioselectiveFriedel−Craftsalkylation of pyrroles with 2-enoylpyridine N-oxides catalyzed by chiral PYBOX-DIPH-Zn(II) complexes has been developed. The catalyst offers substantial substrate scope and furnished alkylated pyrroles in excellent yields (up to 99%) and enantioselectivities (up to >99% ee).