Preparation of nucleoside 3′,5′-cyclic phosphates via phosphotriester intermediates

Abstract

Several ribonucleoside 3′,5′-cyclic phosphates (7b) have been prepared in good yields by the action of base on the corresponding 2′-protected 3′-diphenyl phosphates (5); thymidine 3′,5′-cyclic phosphate (7; R = H, B = thymine-1) has similarly been prepared from both thymidine 3′- and 5′-diphenyl phosphates (8a and 8b).