SYNTHETIC COMMUNICATIONS, 22(8), 1179-1186 (1992) ... 6, 8-diphenyl-6,6-dihydro-ZH-l, 4-oxaxln-2-one, 81 a condenration product of an a-ketoerters with erythro-l,2-dlphenyl-P- hydroxyethyl~lnt, rhlah in turn, upon catalytic hydtogsnatlon, gate a quantitative yield of 8, 6, 6 ...