A. Dondoni et D. Perrone, SYNTHESIS OF N-(TERT-BUTOXYCARBONYL)-N,O-ISOPROPYLIDENE SERINAL FROM SERINE METHYL-ESTER BY A REDUCTION-OXIDATION SEQUENCE, Synthesis, (5), 1997, pp. 527
The title aldehyde is prepared by LiAlH4 reduction of the correspondin
g serine derived methyl ester to the alcohol and Swern oxidation of th
e latter. The aldehyde is obtained in 94 % yield and 96-98 % enantiome
ric purity. This method avoids some problems encountered in the synthe
sis of the same aldehyde by direct controlled DIBAL reduction of the e
ster.