Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... A convenient preparation of L-isoserinal 3 in six steps and 32.8% overall yield employing D-glyceraldehyde acetonide 1 as starting material is described. The procedure is inexpensive, easily scaled up and proceeds without observable racemization. ... The diastereospecific synthesis of a ...