2- and 3-phenylsulfonylindoles – synthetic equivalents of unsubstituted indole in N-alkylation reactions
摘要:
The N-alkylation of 2- and 3-phenylsulfonylindoles under various conditions and the subsequent removal of the activating phenylsulfonyl group by reductive desulfonylation using Raney nickel leads to N-alkylindoles in high yield. 2-Phenylsulfonylindole readily undergoes the Mitsunobu reaction, while isomeric 3-phenylsulfonylindole is relatively inert under these conditions.
Oxidative Cleavage of C<sub>sp<sup>3</sup></sub>–C<sub>sp<sup>2</sup></sub> and C<sub>sp<sup>3</sup></sub>–H Bonds with KO<sup><i>t</i></sup>Bu: Highly Robust and Practical Synthesis of Diaryl/(het-Ar) Ketones
作者:Srinivasarao Yaragorla、Tabassum Khan、Ahalya Behera
DOI:10.1021/acs.joc.2c02519
日期:2023.2.17
report an efficient and practical approach for synthesizing diaryl(het) ketones from R–CO–CHR–Ar through a simultaneous oxidativecleavage of C–C and C–H bonds using KOtBu. This method enables synthesizing a variety of unsymmetrical and symmetrical (hetero)aryl ketones in excellent yields, which are otherwise difficult to make. Besides, we synthesized natural products using this method.
在此,我们报告了一种通过使用 KO t Bu 同时氧化裂解 C-C 和 C-H 键从 R-CO-CHR-Ar 合成二芳基(杂)酮的有效且实用的方法。这种方法能够以优异的收率合成各种不对称和对称(杂)芳基酮,否则很难制备。此外,我们用这种方法合成了天然产物。
Tryptamine Synthesis by Iron Porphyrin Catalyzed C−H Functionalization of Indoles with Diazoacetonitrile
作者:Katharina J. Hock、Anja Knorrscheidt、Renè Hommelsheim、Junming Ho、Martin J. Weissenborn、Rene M. Koenigs
DOI:10.1002/anie.201813631
日期:2019.3.11
non‐precious metal catalysts is an important research area for the development of efficient and sustainable processes. Herein, we describe the development of iron porphyrin catalyzed reactions of diazoacetonitrile with N‐heterocycles yielding important precursors of tryptamines, along with experimental mechanistic studies and proof‐of‐concept studies of an enzymatic process with YfeX enzyme. By using readily
2- and 3-phenylsulfonylindoles – synthetic equivalents of unsubstituted indole in N-alkylation reactions
作者:A. V. Karchava、I. S. Shuleva、A. A. Ovcharenko、M. A. Yurovskaya
DOI:10.1007/s10593-010-0504-3
日期:2010.7
The N-alkylation of 2- and 3-phenylsulfonylindoles under various conditions and the subsequent removal of the activating phenylsulfonyl group by reductive desulfonylation using Raney nickel leads to N-alkylindoles in high yield. 2-Phenylsulfonylindole readily undergoes the Mitsunobu reaction, while isomeric 3-phenylsulfonylindole is relatively inert under these conditions.