Anchimerically Assisted Selective Cleavage of Acid-Labile Aryl Alkyl Ethers by Aluminum Triiodide and <i>N</i>,<i>N</i>-Dimethylformamide Dimethyl Acetal
作者:Dayong Sang、Huaxin Yue、Zhengdong Zhao、Pengtao Yang、Juan Tian
DOI:10.1021/acs.joc.0c00290
日期:2020.5.15
N-dimethylformamide dimethyl acetal (DMF-DMA) for the selective cleavage of ethers via neighboring group participation. Various acid-labile functional groups, including carboxylate, allyl, tert-butyldimethylsilyl (TBS), and tert-butoxycarbonyl (Boc), suffer the conditions intact. The method offers an efficient approach to cleaving catechol monoalkyl ethers and to uncovering phenols from acetal-type protecting
N,N-二甲基甲酰胺二甲基乙缩醛(DMF-DMA)利用三碘化铝通过相邻基团的参与选择性裂解醚。包括羧酸盐,烯丙基,叔丁基二甲基甲硅烷基(TBS)和叔丁氧羰基(Boc)在内的各种酸不稳定官能团均完好无损。该方法为裂解邻苯二酚单烷基醚和从乙缩醛型保护基(如甲氧基甲基(MOM),甲氧基乙氧基甲基(MEM)和四氢吡喃基(THP))上化学选择性解吸酚提供了一种有效的方法。