Regioselective Suzuki-Miyaura reaction of 8-bromo-6-iodo-9-(2,3,5-tri-O-acetyl-β-D-ribofuranosyl)purine with phenylboronic acid gave 8-bromo-6-phenylpurine derivative that was used for cross-coupling reactions (with PhB(OH)2, Me3Al, Et3Al, BnZnCl) or nucleophilic substitutions (with NaOH, NaOMe, NH3, NHMe2 or thiourea). A series of 8-X-substituted 6-phenyl-9-(β-D-ribofuranosyl)purines (X = Ph, Me, Et, Bn, OH, OMe, NH2, NMe2, SH) was prepared in this way directly or after deprotection. None of the title nucleosides exhibited any considerable cytostatic activity.
使用苯硼酸进行区域选择性Suzuki-Miyaura反应,将8-溴-6-碘-9-(2,3,5-三-O-乙酰-β-D-核糖呋喃)嘌呤转化为8-溴-6-苯基嘌呤衍生物,并用于交叉偶联反应(与PhB(OH)2,Me3Al,Et3Al,BnZnCl)或亲核取代反应(与NaOH,NaOMe,NH3,NHMe2或硫脲)。通过此方法直接或去保护后制备了一系列8-X取代的6-苯基-9-(β-D-核糖呋喃基)嘌呤(X = Ph,Me,Et,Bn,OH,OMe,NH2,NMe2,SH)。这些核苷酸中没有一个表现出任何显著的细胞毒素活性。