O-METHYL DERIVATIVES OF AZITHROMYCIN A, PROCESS AND INTERMEDIATES FOR THEIR PREPARATION, AND PROCESS OF PREPARATION AND USE THEREOF IN THE PREPARATION OF PHARMACEUTICALS

摘要

Derivs. of azithromycin A of formula (I) and salts are new. (Ia) : R1 = R2 = CO2CH2C6H5; R3 = CH3; R4 = R5 = H; (Ib) : R1 = R2 = CO2CH2C6H5; R3 = R4 = CH3; R5 = H; (Ic) : R1 = R2 = CO2CH2C6H5; R3 = R5 = H; R4 = CH3; (Id) : R1 = R2 = CO2CH2C6H5; R3 = R4 = R5 = CH3; (Ie) : R1 = R2 = R4 = R5 = H; R3 = CH3; (If) : R1 = R2 = R5 = H; R3 = R5 = CH3; (Ig) : R1 = R2 = R5 = H; R4 = CH3; (Ih) : R1 = R2 = H; R3 = R4 = R5 = CH3; (Ii) : R1 = R4 = R5 = H; R2 = R3 = CH3; (Ij) : R1 = R5 = H; R2 = R3 = R4 = CH3; (Ik) : R1 = R3 = R5 = H; R2 = R4 = CH3; (Il) : R1 = H; R2 = R3 = R4 = R5 = CH3.