Heterocyclic Compounds from Sugars, XV: On the Configuration of Chiral C-2 Substituted 1,3-Thiazolidine-4-carboxylic Acids. Chirality Transfer to C-3 of 3,4-Dihydro-1H-pyrrolothiazoles

Article abstract of DOI:10.1007/BF00818164

5-Substituted 3,4-dihydro-pyrrolo<1,2-c>thiazole-6,7-dicarboxylic acid esters 3 are obtained from 2-substituted-3-acyl-1,3-thiazolidine-4-carboxylic acids, 1 in <3+2>-cycloaddition reactions via mesoionic oxazolone ("muenchnone") intermediates.The chirali