Detritylation of<b>
<i>N</i>
</b>-Tritylamines via a Naphthalene-Catalyzed Lithiation Process
作者:Miguel Yus、Cherif Behloul、David Guijarro
DOI:10.1055/s-2004-822358
日期:——
The reaction of aliphatic and aromatic secondary and tertiary N-tritylamines 1 with lithium powder and a catalytic amount of naphthalene led to reductive detritylation, affording the corresponding amines 2 in good to excellent yields. The trityl group could selectively be removed in the presence of an allyl or a benzyl group. The detritylation process could successfully be extended to several hydroxy, alkoxy and amino functionalized N-tritylamines. The chemoselectivity between the trityl-nitrogen and the trityl-oxygen bond cleavages was also studied. This methodology represents an efficient deprotection of N-tritylamines under nonacidic reaction conditions.
非芳香族和芳香族的二级和三级N-三苯基胺1与锂粉和催化量的萘反应导致还原性去三苯基化,得到相应的胺2,产率良好至优异。在存在烯丙基或苄基的情况下,可以选择性去除三苯基基团。去三苯基化过程成功扩展到多个羟基、醚基和氨基功能化的N-三苯基胺。还研究了三苯基氮和三苯基氧键断裂之间的化学选择性。这种方法在非酸性反应条件下有效地去保护了N-三苯基胺。