Treatment of prenyl (Pre) ethers of simple alcohols, carbohydrates, steroids, with I2 in CH2Cl2 in the presence of 3Å molecular sieves, constitutes an effective method for their deprotection. This method tolerates other etheral functionalities such as acetals, allyl, t-butyldiphenylsilyl or benzyl groups as well as base labile groups such as acetates. This method applied to a prenyl aryl ether gave rise to a 2,2-dimethylchroman derivative in an acceptable yield.
用I2在
CH2Cl2中,结合3Å
分子筛处理简单醇、
碳水化合物和类
固醇的prenyl (Pre) 醚,构成了一种有效的去保护方法。该方法能够耐受其他醚功能团,如
缩醛、烯丙基、叔丁基二苯基
硅烷或苄基基团,以及一些基团如
乙酸酯等不稳定基团。将该方法应用于prenyl芳基醚,得到了具有可接受产率的2,2-二甲基色烯衍
生物。