Selective protection of the primary hydroxyl groups of oxetanocin A and conformational analysis of O-protected oxetanocin A.
作者:Nobuya KATAGIRI、Masashi MAKINO、Chikara KANEKO
DOI:10.1248/cpb.43.884
日期:——
One of the two primary hydroxyl groups of oxetanocin A was protected selectively with acetyl and o-nitrobenzyl groups using enzymatic and photochemical reactions, respectively. On the basis of 1H-NMR spectroscopy and NOE experiment, 4'-O-protected oxetanocin A was found to take syn conformation in an aprotic solvent irrespective of the kind of protecting group owing to an intramolecular hydrogen bond.