H. Ogawa et al., REACTION OF LITHIUM TRIMETHYLSILYLDIAZOMETHANE WITH N,N-DIALKYLAMIDESOF ALPHA-KETO ACIDS AND N,N-DISUBSTITUTED ALPHA-AMINO KETONES, Heterocycles, 42(1), 1996, pp. 75-82
Lithium trimethylsilyldiazomethane smoothly reacted with N,N-dialkylam
ides of alpha-keto acids and N,N-disubstituted alpha-amino ketones to
give 2-oxo-3-pyrrolines and 3-pyrrolines, respectively, in good to mod
erate yields.