首次公开了通过炔的亲电碳硫基化对轴向手性化合物的对映选择性结构。通过使用Ts保护的双官能硫化物催化剂和Ms保护的邻炔基芳基胺(Ts =甲苯磺酰基; Ms =甲磺酰基),可以实现这种对映选择性转化。亲电芳基硫醇化试剂和亲电三氟甲基硫醇化试剂均适用于该反应。轴向手性乙烯基-芳基氨基硫化物的所得产物可以容易地转化为联芳基氨基硫化物,联芳基氨基亚砜,联芳基胺,乙烯基芳基胺和其他有价值的双官能化化合物。
Organocatalytic Atroposelective Arylation of 2-Naphthylamines as a Practical Approach to Axially Chiral Biaryl Amino Alcohols
作者:Ye-Hui Chen、Liang-Wen Qi、Fang Fang、Bin Tan
DOI:10.1002/anie.201710537
日期:2017.12.18
The phosphoric acid catalyzeddirect arylation of 2-naphthylamines with iminoquinones enables the atroposelective synthesis of axiallychiral biaryl amino alcohols. Many functional groups are tolerated in this reaction, and it is a rare example of 2-naphthylamines acting as nucleophiles in an organocatalytic enantioselective transformation.
A nickel-catalyzed protocol for the conversion of aryl and heteroaryl alcohol derivatives to primary and secondary aromaticamines via C(sp2)–O bond cleavage is described. The new amination protocol can be applied to a range of substrates bearing diverse functional groups and uses readily available benzophenone imines as an effective nitrogen source.
Design and Atroposelective Construction of IAN analogues by Organocatalytic Asymmetric Heteroannulation of Alkynes
作者:Lei Zhang、Jiahua Shen、San Wu、Guofu Zhong、Yong‐Bin Wang、Bin Tan
DOI:10.1002/anie.202010598
日期:2020.12.14
atroposelective strategy for accessing enantioenriched axially chiral IAN analogues was developed for the first time. A class of novel atropisomeric C2‐arylquinoline skeletons were synthesized with high enantiocontrol via chiral phosphoric‐acid‐catalyzed heteroannulation of in situ generated vinylidene ortho‐quinone methide (VQM) intermediates with ortho‐aminophenones. The strategy tolerated a broad
feedstocks in one reaction. Herein, we report the first utilization of both elemental sulfur and CO2 in a multi-component reaction to generate valuable thiazolidin-2-ones and 1,3-thiazinan-2-ones. Under transition-metal-free reaction conditions, a variety of easily available arylamines react with elemental sulfur and CO2 (1 atm) to give functional thiazolidin-2-ones and 1,3-thiazinan-2-ones in moderate to good