A facile new procedure for the deprotection of allyl ethers under mild conditions
作者:Yun-Jin Hu、Romyr Dominique、Sanjoy Kumar Das、René Roy
DOI:10.1139/v00-073
日期:2000.6.1
instead of cross-metathesis during an olefin metathesis reaction using Grubbs' ruthenium benzylidene catalyst (Cy3P)2RuCl2=CHPh (1), N-allyltritylamine, and N,N-diisopropylethylamine as necessary auxiliary reagents. In the search for a better catalytic system, it has been found that dichlorotris(triphenylphosphine)ruthenium(II), [(C6H5)3P]3RuCl2, (2) was much more efficient for the isomerization of allylic
在使用 Grubbs 的亚苄基钌催化剂 (Cy3P)2RuCl2=CHPh (1)、N-烯丙基三苯甲基胺和 N 的烯烃复分解反应期间,观察到 O-烯丙基糖苷的新型异构化为丙-1-烯基糖苷,而不是交叉复分解, N-二异丙基乙胺为必要的辅助试剂。在寻找更好的催化系统的过程中,发现二氯三(三苯基膦)钌 (II), [(C6H5)3P]3RuCl2, (2) 对于烯丙基醚的异构化更有效。使用 HgCl2-HgO 很容易水解不稳定的丙-1-烯基,并以极好的收率(约 90%)分离出半缩醛(25-32)。 关键词:烯丙基醚,碳水化合物,格鲁布斯催化剂,异构化,复分解,脱保护。