Synthesis of 1,3-disubstituted benzo[c]thiophene analogs containing benzo[b]thiophene/benzo[b]pyrrole
作者:Arasambattu K. Mohanakrishnan、J. Arul Clement、P. Amaladass、V.S. Thirunavukkarasu
DOI:10.1016/j.tetlet.2007.10.018
日期:2007.12
The synthesis of 1,3-disubstituted benzo[c]thiophene analogs incorporating benzo[b]thiophene/benzo[b]pyrrole units is described.
描述了结合有苯并[ b ]噻吩/苯并[ b ]吡咯单元的1,3-二取代的苯并[ c ]噻吩类似物的合成。
Biomimetic Asymmetric Reduction of Tetrasubstituted Olefin 2,3-Disubstituted Inden-1-ones with Chiral and Regenerable NAD(P)H Model CYNAM
作者:Zhou-Hao Zhu、Yi-Xuan Ding、Bo Wu、Yong-Gui Zhou
DOI:10.1021/acs.orglett.1c02568
日期:2021.9.17
Because of the formidable development of the asymmetric reduction of tetrasubstituted olefins, an effective method is in urgent demand. Herein, through the biomimetic protocol of the coenzyme NAD(P)H, the reduction of tetrasubstituted olefin 2,3-substituted 1H-inden-1-ones has been successfully realized with the catalytic chiral NAD(P)Hmodel CYNAM, which is hard to bring about via the common rhodium
Catalytic Asymmetric Synthesis of Inherently Chiral <scp>Saddle‐Shaped</scp> Dibenzo[<i>b</i>,<i>f</i>][1,5]diazocines<sup>†</sup>
作者:Jinmiao Zhou、Mengyao Tang、Xiaoyu Yang
DOI:10.1002/cjoc.202400243
日期:——
Dibenzo[b,f][1,5]diazocines are a class of eight-membered heterocycles, which exhibit unique rigid saddle-shaped structure and possess inherent chirality. In this study, we report a convenient and straightforward method for the catalytic enantioselective synthesis of these unique chiral molecules through chiral phosphoric acid-catalyzed dimerization of 2-acylbenzoisocyanates. Notably, the addition
二苯并[ b , f ][1,5]二氮杂辛是一类八元杂环化合物,具有独特的刚性鞍状结构并具有固有的手性。在这项研究中,我们报告了一种方便、直接的方法,通过手性磷酸催化 2-酰基苯并异氰酸酯的二聚,催化对映选择性合成这些独特的手性分子。值得注意的是,添加相应的2-酰基苯胺作为助催化剂显着提高了这些反应的效率,并且简单的相分离操作导致产物具有优异的对映体纯度。进行实验研究是为了阐明这些反应背后的机制,并根据研究结果提出合理的反应机制。