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2005
Enantioselective syntheses
O 0031
Highly Enantioselective Friedel—Crafts Alkylations of Pyrroles and Indoles with
Enones under Cu(II)-Simple Bis(oxazoline) Catalysis. — Copper
34- 032 α'-Hydroxy
complexes (I) are found to be efficient catalysts for the title reaction. The formation of
dialkylation products can be suppressed by lowering the reaction temperature and increasing the amount of heteroarene. The potential of the present method is demonstrated by elaboration of the resulting adducts through oxidative cleavage ot the ketol
moiety, leading to aldehydes, ketones and carboxylic acids. — (PALOMO*, C.;
OIARBIDE, M.; KARDAK, B. G.; GARCIA, J. M.; LINDEN, A.; J. Am. Chem. Soc.
127 (2005) 12, 4154-4155; Dep. Quim. Org., Fac. Quim., Univ. Pais Vasco,
E-20080 San Sebastian, Spain; Eng.) — Klein
2005
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