One-pot synthesis of disulfide-linked N-sulfonylazetidin-2-imines via a copper-catalyzed multicomponent cascade reaction
作者:Yongjia Shang、Kaisheng Liao、Xinwei He、Jinsong Hu
DOI:10.1016/j.tet.2013.09.033
日期:2013.11
A copper-catalyzed, three-component reaction between a sulfonyl azide, an alkyne, and a 2-aminothiophenol derived Schiff base is reported. This novel one-pot procedure involves a click reaction, a formal [2+2] cycloaddition, and S–S coupling, therefore, providing a unique method for the synthesis of novel disulfide-linked N-sulfonylazetidin-2-imines under mild conditions.
Facile Preparation of 2-Substituted Benzoxazoles and Benzothiazoles via Aerobic Oxidation of Phenolic and Thiophenolic Imines Catalyzed by Polymer-Incarcerated Platinum Nanoclusters
Platinum nanoclusters supported on a polymer/carbon black composite material was found to be an excellent catalyst for the oxidative cyclization of phenolic and thiophenolic Schiff bases to 2-substituted benzoxazoles and benzothiazoles under ambient conditions.
Novel aluminium compounds derived from Schiff bases: Synthesis, characterization and catalytic performance in hydroboration
作者:Da Jin、Xiaoli Ma、Yashuai Liu、Jiong Peng、Zhi Yang
DOI:10.1002/aoc.4637
日期:2019.3
Seven novel aluminium complexes supported by Schiff base ligands derivedfrom o‐diaminobenzene or o‐aminothiophenol were synthesized and characterized. The reactions of AlMe3 with L1 (N,N′‐bis(benzylidine)‐o‐phenylenediamine) and L2 (N,N′‐bis(2‐thienylmethylene)‐o‐phenylenediamine) gave the complexes L1AlMe3 (1) and L2AlMe2 (2), respectively, which involved two types of reaction mechanisms: one was
Abstract A group of five new ruthenium(II) bipyridine heterochelates of the type [RuII (bpy) 2L] + 1a – 1e have been synthesized (bpy=2,2′-bipyridine; L=anionic form of the thiol-based imine ligands, HS–C 6 H 4 NC(H)C6 H 4 (R) (R=OMe, Me, H, Cl, NO 2 ). The complexes 1a − 1e are 1:1 conducting and diamagnetic. The complexes 1a − 1e exhibit strong MLCT transitions in the visible region and intra-ligand
分离的单电子顺磁性钌(III)络合物1c +在1:1的氯仿-甲苯溶液中,在77 K时具有弱的菱形EPR谱(g 1 = 2.106,g 2 = 2.093,g 3 = 1.966)。分析了1c +的EPR光谱以提供畸变参数(Δ= 8988 cm -1; V = 0.8833 cm -1)和预期的配体场跃迁的能量(ν1 = 1028 nm和ν2 = 1186 nm)的值)在t 2壳内。在1265 nm处已通过实验观察到一种配体场跃迁。在t 2壳层中具有8833 cm -1)和预期的配体场跃迁的能量(ν1 = 1028 nm和ν2 = 1186 nm)。在1265 nm处已通过实验观察到一种配体场跃迁。在t 2壳层中具有8833 cm -1)和预期的配体场跃迁的能量(ν1 = 1028 nm和ν2 = 1186 nm)。在1265 nm处已通过实验观察到一种配体场跃迁。
Dess-Martin Periodinane Mediated Intramolecular Cyclization of Phenolic Azomethines: A Solution-Phase Strategy toward Benzoxazoles and Benzothiazoles
作者:D. Bose、Mohd. Idrees
DOI:10.1055/s-0029-1217136
日期:2010.2
Dess-Martin periodinane (DMP), a highly versatile hypervalent iodine(V) reagent, was found to efficiently mediate the intramolecular cyclization of phenolic azomethines/Schiff bases at ambient temperature leading to the rapid and expeditious synthesis of substituted benzoxazoles and benzothiazoles. Furthermore, a solution-phase strategy has been developed by treating the reaction mixtures sequentially with Amberlyst A-26 thiosulfate resin and diisopropylaminomethyl resin (PS-DIEA), which remove excess reagent and byproducts, to give pure products.