H. Koga et al., POTENT, ACID-STABLE AND ORALLY-ACTIVE MACROLIDE-TYPE MOTILIN RECEPTORAGONISTS, GM-611 AND THE DERIVATIVES, Bioorganic & medicinal chemistry letters, 4(11), 1994, pp. 1347-1352
Based on the acid decomposition mechanism of erythromycin A, 1-deoxy-1
2-O-methyl-11-oxo-8.9-anhydroerythromycin A 6,9-hemiacetals were desig
ned and synthesized. GM-611 (11) and the derivatives 8 and 10 were aci
d-stable and showed potent in vitro and in vivo motilin agonistic acti
vities, and these compounds were thought to be promising orally active
prokinetic agents.