9-<5-O-(tert-butyldimethylsilyl)-β-D-arabinofuranosyl>adenine 、
异丁酰氯 生成
9-(2,3-Di-O-isobutyryl-β-D-arabino-furanosyl)-adenin 、 9-[5-O-tert-butyldimethylsilyl)-2,3-di-O-isobutyryl-β-D-arabinofuranosyl[adenine, which, on reaction with 3.7 g. of tetrabutylammonium fluoride in 100 ml. of tetrahydrofuran and 0.5 ml. of glacial acetic acid, following the procedure of c)