Toluene-4-sulfonic acid (3aR,4R,6R,6aR)-6-(5,6-dimethyl-2,9-dioxo-1,2,5,9-tetrahydro-imidazo[1,2-a]purin-3-yl)-2,2-dimethyl-tetrahydro-furo[3,4-d][1,3]dioxol-4-ylmethyl ester 在
三乙胺 作用下,
以
氯仿 为溶剂,
反应 5.0h,
以92%的产率得到(1R,16R,17R,21R)-6,7,19,19-tetramethyl-14,18,20,22-tetraoxa-2,4,6,9,12-pentazahexacyclo[14.5.1.02,13.03,11.05,9.017,21]docosa-3(11),4,7,12-tetraen-10-one