Direct Amination of α-Triaryl Alcohols via Vanadium Catalysis
作者:Jinglei Yang、Yun-Dong Wu、Maoping Pu
DOI:10.1021/acs.joc.3c00414
日期:2023.6.2
α-Triaryl amines have been used as pharmaceuticals and pharmaceutical intermediates for antifungal and anticancer applications. Current methods to synthesize such compounds require at least two steps, and no directamination of tertiary alcohols has been reported. Herein, we disclose efficient catalytic conditions for the directamination of α-triaryl alcohols to access α-triaryl amines. VO(OiPr)3
α-三芳基胺已被用作抗真菌和抗癌应用的药物和药物中间体。目前合成此类化合物的方法至少需要两步,并且没有报道过直接胺化叔醇。在此,我们公开了直接胺化 α-三芳基醇以获得 α-三芳基胺的有效催化条件。VO(O i Pr) 3,一种市售试剂,已被确定为几种α-三芳基醇直接胺化的有效催化剂。这个过程是可扩展的,正如克级合成所证明的那样,反应在低至 0.01 mol% 的催化剂负载下仍然有效,周转数达到 3900。此外,包括克霉唑和氟霉唑在内的商业药物已成功快速制备,有效地使用这种新开发的方法。
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.