Sg. Davies et Dr. Fenwick, USE OF LITHIUM (ALPHA-METHYLBENZYL)ALLYLAMIDE FOR A FORMAL ASYMMETRIC-SYNTHESIS OF THIENAMYCIN, Chemical communications, (6), 1997, pp. 565-566
The highly stereoselective conjugate addition of lithium (alpha R)-(al
pha-methylbenzyl)allylamide 3 to (E)-tert-butyl penta-2,4-dienoate 4,
followed by a stereoselective aldol reaction with acetaldehyde, are th
e key steps in the synthesis of the known P-lactam intermediate, utyl-
dimethylsilyloxy)ethyl]-4-vinylazetidin-2-one 2, for elaboration to th
ienamycin and its derivatives.