Stereoselective preparation of chiral compounds in Mannich-type reactions of a bicyclic imine and phenols or indole
摘要:
Mannich-type reactions of a chiral bicyclic imine and various nucleophiles yield the corresponding adducts with good to high diastereoselectivity. The influence of the reaction conditions on the yield and stereochemical outcome is investigated. The configuration of the products is established by H-1 NMR spectroscopy, and the major isomers of two adducts are characterized by X-ray crystallography. (C) 2014 Elsevier Ltd. All rights reserved.
Novel enantiopure policyclic nitrogen heterocycles have been obtained in the diastereoselective aza-Diels-Alder or Mannich reaction of dienes with imine formed in situ from ethyl glyoxylate and (1R,2R)-diaminocyclohexane.
Stereoselective preparation of chiral compounds in Mannich-type reactions of a bicyclic imine and phenols or indole
Mannich-type reactions of a chiral bicyclic imine and various nucleophiles yield the corresponding adducts with good to high diastereoselectivity. The influence of the reaction conditions on the yield and stereochemical outcome is investigated. The configuration of the products is established by H-1 NMR spectroscopy, and the major isomers of two adducts are characterized by X-ray crystallography. (C) 2014 Elsevier Ltd. All rights reserved.