AN ECONOMICAL LARGE SCALE PREPARATION OF (2S13S)-4,5-DIMETHYL-2-PHENYL-1 ,3-D1OXOLAN ... Deparbent of Organic Chemistry, The University, Leeds LS2 9JT. ... ABSTRACT: An economical 5-step synthesis of (2S,55) -4,5- -dimethyl-2-phenyl-1,3-dioxolan from (2R,3R)-tartaric acid is described. ... (ZS,SS) -4,5-Dimethyl-2-phenyl-l,3-dioxolan (1) is a ... “he sequence shown in the Scheme provides a more economical