Abstract The products of dehydration of pentitols in aqueous sulfuric acid have been studied by g.l.c.-m.s. Four isomeric 1,4-anhydropentitols were formed from d -arabinitol, but only two from xylitol and ribitol. The number of products could only be explained by assuming inversion of configuration at C-2 or C-4 during 1,4- or 2,5-cyclisation reactions. No product which involved inversion of configuration
Dehydration Of D-arabinitol, ribitol, and xylitol at high temperature in the presence of molecular sieves without solvent in an argon atmosphere is described. Products arising after the dehydration-cyclization (cyclodehydration) reaction with retention or inversion of the configuration of asymmetric carbon atoms, were observed. Complete analytical separations of exhaustively O-acetylated reaction products were achieved by means of GC. The chemical structures of the compounds obtained were assigned using co-injection with standards.
GAREGG, PER J.;LINDBERG, BENGT;KONRADSSON, PETER;KVARNSTROM, INGEMAR, CARBOHYDR. RES., 176,(1988) N 1, 145-148
作者:GAREGG, PER J.、LINDBERG, BENGT、KONRADSSON, PETER、KVARNSTROM, INGEMAR