Starting from (2R)-bornane-10,2-sultam 1, the useful chiron N-glyoxylo
yl-(2R)-bornane-10,2-sultam 5 is prepared via its crystalline precurso
r 4. The hemiacetal 4 whose structure was proved by the X-ray analysis
is formed in diastereomerically pure form. Copyright (C) 1996 Elsevie
r Science Ltd