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.
Selective N-alkylation of indoles with primary alcohols using a Pt/HBEA catalyst
作者:S. M. A. Hakim Siddiki、Kenichi Kon、Ken-ichi Shimizu
DOI:10.1039/c4gc01419g
日期:——
(H+-exchanged BEA zeolite) is found to be an effective and reusable heterogeneous catalyst for regioselective N-alkylation of indoles with primary aliphatic and benzylic alcohols under additive-free conditions driven by the borrowing-hydrogen methodology. Structural and mechanistic studies suggest a cooperative mechanism of the Pt0 site on Pt metal clusters and the Brønsted acid site of the zeolite,
Nickel-Catalyzed Regioselective C(2)−H Difluoroalkylation of Indoles with Difluoroalkyl Bromides
作者:Vineeta Soni、Dipesh M. Sharma、Benudhar Punji
DOI:10.1002/asia.201800504
日期:2018.9.4
RegioselectiveC(2)−Hdifluoroalkylation of C‐3 unsubstituted indoles with commonly available fluoroalkyl bromides is successfully achieved employing a simple nickel catalyst system, (DME)NiCl2/Xantphos. This methodology shows excellent regioselectivity and exhibits a broad substrate scope. Various functional groups, such as ‐OMe, ‐F, and ‐Br, are tolerated on the indole backbone to give the difluoroalkylated
A class of novel indole is disclosed together with the use of such compounds for inhibiting sPLA
2
mediated release of fatty acids for treatment of Inflammatory Diseases such as septic shock.