A simple and efficient method for the synthesis of some hitherto unreported pyrimidine-annulated spiro-dihydrofurans has been described. In the presence of AgSbF6 spiro- and furo-pyrimidine (10-hydroxy-4,7,9-substituted-1-oxa-7,9-diazaspiro[4.5]dec-3-ene-6,8-dione) heterocycles are obtained in good yields. The nature of the alkyne moiety present in substrates dictates the mode of cyclization to form the furopyrimidine derivatives.
本研究描述了一种简单而有效的方法,用于合成一些迄今为止尚未报道过的
嘧啶烷化螺-二氢
呋喃。在 AgSbF6 的存在下,可以以良好的收率获得螺
嘧啶和
呋喃嘧啶(10-羟基-4,7,9-取代-1-氧杂-7,9-二氮杂螺[4.5]癸-3-烯-6,8-二酮)杂环。底物中存在的炔基的性质决定了形成
呋喃嘧啶衍
生物的环化模式。