G. Kardassis et al., ELECTROGENERATED CHIRAL CATIONIC GLYCINE EQUIVALENTS - PART-1 - THE 6-METHOXY DERIVATIVE OF CYCLO(L-PRO-GLY), Tetrahedron, 54(14), 1998, pp. 3471-3478
The cyclic N,O-acetal cyclo(L-Pro-Gly(OMe)OMe (8) has proved to be an
effective chiral electrophilic glycine equivalent which is applicable
in nucleophilic substitution reactions not only under Broenstedt acid
catalysis but also under Lewis acid catalysis with excellent diastereo
selectivities. This chiral building block can easily be obtained by el
ectrochemical methoxylative decarboxylation of the cyclic dipeptide 6
generated from L-proline and aminomalonic diester. Thus, enantiomerica
lly pure D-allyl glycine has been generated. (C) 1998 Elsevier Science
Ltd. All rights reserved.