Palladium‐Catalyzed Suzuki Coupling and NIS‐Mediated Dehydrogenative Cylcoetherification: A Concise Approach to 6,6‐Disubstituted 6
<i>H</i>
‐benzo[
<i>c</i>
]chromenes and Total Synthesis of Didehydroconicol
作者:Chander Shekhar、Gedu Satyanarayana
DOI:10.1002/ejoc.202101444
日期:2022.5.13
Herein, we report a concise approach of 6,6-disubstituted 6H-benzo[c]chromenes in a two-step sequence starting from ortho-bromo benzylic alcohols and arylboronic acids, using intermolecular palladium-catalyzed C−C and intramolecular N-Iodosuccinimide (NIS) mediated key C−O bonds construction.
在此,我们报告了一种从邻溴苯甲醇和芳基硼酸开始的两步序列中 6,6-二取代 6 H-苯并[ c ]色烯的简明方法,使用分子间钯催化的 C - C 和分子内N-碘代琥珀酰亚胺 (NIS) 介导了关键的 C-O 键构建。
(1-Benzylindole-3-yl)alkanoic Acids; Novel Nonsteroidal Inhibitors of Steroid 5.ALPHA.-Reductase (I).
A novel series of indole-3-alkanoic acids with varied N-benzyl substituents were synthesized as nonsteroidalinhibitors of steroid 5 alpha-reductase. The structure-activity relationships in this series were studied and the optimum carboxylic acid side chain was butyric acid. Furthermore, compounds with a diaryl substituent at the 1-position of the indole ring displayed strong inhibitory activities
Photocatalytic dehydrogenated etherification of 2-aryl benzylic alcohols
作者:Zhihui Liang、Chao Liu、Jiajun Fan、Mingze Wang、Xuanyu Yan、Mingqiang Huang、Shunyou Cai
DOI:10.1039/d2gc02030k
日期:——
we describe an efficient and practical method for the conversion of 2-aryl benzylic alcohols into the corresponding chromenes through visible-light-induced photoredox catalysis. This protocol has been applied to a wide range of benzylic alcohols, involving pharmaceuticals and natural products, with the synergistic interactions of 2-bromoanthraquinone, O2, nBu4NBr and K2CO3 in EtOH under visible-light
在这里,我们描述了一种通过可见光诱导的光氧化还原催化将 2-芳基苯甲醇转化为相应色烯的有效且实用的方法。该协议已应用于广泛的苯甲醇,包括药物和天然产物,在可见光照射下,2-溴蒽醌、O 2、n Bu 4 NBr 和 K 2 CO 3在 EtOH 中具有协同作用。该协议在结构复杂的 6 H-苯并[ c ]色烯合成中的后期应用证明了其合成效用。