对甲苯磺酸 、
N-[(1R,13R,14R,18R)-16,16-dimethyl-7-oxo-11,15,17,19-tetraoxa-2,4,6,9-tetrazapentacyclo[11.5.1.02,10.03,8.014,18]nonadeca-3(8),5,9-trien-5-yl]acetamide 以
氯苯 为溶剂,
以77%的产率得到Toluene-4-sulfonic acid (3aR,4R,6R,6aR)-6-(2-acetylamino-6,8-dioxo-1,6,7,8-tetrahydro-purin-9-yl)-2,2-dimethyl-tetrahydro-furo[3,4-d][1,3]dioxol-4-ylmethyl ester