Je. Baldwin et Rc. Burrell, Synthesis, resolution, and absolute stereochemistry of (1R,2S)-(+)-cis-1-methoxycarbonyl-2-methylcyclobutane, J ORG CHEM, 65(21), 2000, pp. 7139-7144
Racemic cis-1-methoxycarbonyl-2-methylcyclobutane uncontaminated with the t
rans isomer was prepared efficiently in five steps; the corresponding amide
s from (R)-(-)-phenylglycinol were separated. An X-ray crystallographic str
ucture determination of the amide from (+)-cis-1-methoxycarbonyl-2-methylcy
clobutane showed that it was of (1R,2S) absolute stereochemistry, a revisio
n of configurational assignment.