Cuprous Oxide Catalyzed Oxidative CC Bond Cleavage for CN Bond Formation: Synthesis of Cyclic Imides from Ketones and Amines
作者:Min Wang、Jianmin Lu、Jiping Ma、Zhe Zhang、Feng Wang
DOI:10.1002/anie.201508071
日期:2015.11.16
cleavage of a CCbond offers a straightforward method to functionalize organic skeletons. Reported herein is the oxidative CCbond cleavage of ketone for CN bondformation over a cuprous oxide catalyst with molecular oxygen as the oxidant. A wide range of ketones and amines are converted into cyclic imides with moderate to excellent yields. In‐depth studies show that both α‐CH and β‐CH bonds adjacent
A Rhodium-Catalyzed Cascade Cyclization: Direct Synthesis of<i>N</i>-Substituted Phthalimides from Isocyanates and Benzoic Acids
作者:Xian-Ying Shi、Andrea Renzetti、Soumen Kundu、Chao-Jun Li
DOI:10.1002/adsc.201300834
日期:2014.3.10
A rhodium(III)‐catalyzed amidation between benzoicacids and isocyanates via direct functionalization of an ortho CH bond followed by intramolecular cyclization is described. This cascadecyclization affords N‐substituted phthalimides in one step in 26–91% yields. The reaction is highly atom‐economical, since no theoretical waste except for water is generated in the reaction.
Ruthenium(II)‐Catalyzed CH Activation with Isocyanates: A Versatile Route to Phthalimides
作者:Suman De Sarkar、Lutz Ackermann
DOI:10.1002/chem.201404261
日期:2014.10.20
A cationic ruthenium(II)‐complex was utilized in the efficient synthesis of phthalimide derivatives by CHactivation with synthetically useful amides. The reaction proceeded through a mechanistically unique insertion of a cycloruthenated species into a CHet multiple bond of isocyanate. The novel method also proved applicable for the synthesis of heteroaromatic unsymmetric diamides as well as a potent
intermolecular [3 + 2] annulation pathway for aromatic acids with isocyanates to afford N-substituted phthalimide in one step is demonstrated, which provides an efficient process to direct preparation of phthalimidefrom commercially available starting materials and environmentally benign catalysts. This cascadecyclization involves the direct functionalization of an ortho C–H bond and the subsequent
synthesized and their antiinflammatory activities toward NLRP3 (nucleotide-binding domain leucine-rich repeat containing protein family,pyrin domain-containing 3,also known as cryopyrin or NALP3) inflammasome were evaluated in vitro. Two lead compounds, TBZ-09 and TBZ-21, were identified by antiproduction of IL-1β. In the second round of biological evaluation, based on the lead, 34 more compounds were synthesized