Alkylations of 9- and 7-[(2-acetoxyethoxy)methyl]-N2-acetylguanine with alkyl halogenides in the presence of base have been investigated affording a new route to the preparation of 1,N2-dimethyl- as well as O6-benzyl-9(7)-alkoxyalkylguanines. 1H NMR spectra revealed that the 1,N2-dimethyl derivatives exist as mixtures of two conformers at room temperature due to the restricted rotation about the C2-N2 bond. These findings agreed with conformational calculations.
在碱的存在下,使用烷基卤化物对9-和7-[(2-乙酰氧乙氧基)甲基]-N2-乙酰基鸟嘌呤进行烷基化反应的研究,提供了制备1,N2-二甲基以及O6-苄基-9(7)-烷氧基烷基鸟嘌呤的新途径。1H NMR光谱显示,由于C2-N2键的受限旋转,1,N2-二甲基衍生物在室温下存在两种构象的混合物。这些发现与构象计算一致。