635-90-5Relevant articles and documents
Synthesis of pyrrole by 1,5,3,7-diazadiphosphocine-1,5-dicarboxylic acid as acid catalyst
Lee,Lee,Jung,Hahn
, p. 2257 - 2259 (2015)
As a part of research program related to the synthetic study of pharmacologically interesting compounds and good chelating agent for transition metal ion, we here report the synthesis of an unusual medium-sized ring heterocyclic ligand with mixed carboxylic-amino-phosphonic donating group. We have synthesized 3,7-dihydroxy-3,7-dioxoperhydro-1,5,3,7-diazadiphosphocine-1,5-diacetic acid (1a), 2-[5-(1,2-dicarboxyethyl-3,7-dihydroxy-3,7-dioxo-3[1,5,3,7]diazadiphosphocan-1-yl)-succinic acid (1b) and 3,7-dihydroxy-3,7-diox-operhydro-1,3,5,7-diazadiphosphocine-1,5-di-(2-glutaric acid) (1c). In order to analyze reactivity of synthesized dicarboxylic acids 1a-c as acid catalysts, we tried reactions of pyrrole formation according to acid variation. We know that the catalytic ability of synthesized dicarboxylic acids (1a-c) are very good at pyrrole formation reaction.
A Bottleable Imidazole-Based Radical as a Single Electron Transfer Reagent
Das, Arpan,Ahmed, Jasimuddin,Rajendran,Adhikari, Debashis,Mandal, Swadhin K.
, p. 1246 - 1252 (2020/12/21)
Reduction of 1,3-bis(2,6-diisopropylphenyl)-2,4-diphenyl-1H-imidazol-3-ium chloride (1) resulted in the formation of the first structurally characterized imidazole-based radical 2. 2 was established as a single electron transfer reagent by treating it with an acceptor molecule tetracyanoethylene. Moreover, radical 2 was utilized as an organic electron donor in a number of organic transformations such as in activation of an aryl-halide bond, alkene hydrosilylation, and in catalytic reduction of CO2 to methoxyborane, all under ambient temperature and pressure.
L-Proline N-oxide dihydrazides as an efficient ligand for cross-coupling reactions of aryl iodides and bromides with amines and phenols
Ding, Zhiqiang,Nie, Nan,Chen, Tian,Meng, Lingxin,Wang, Gongshu,Chen, Zhangpei,Hu, Jianshe
supporting information, (2020/12/21)
A novel catalytic system based on L-proline N-oxide/CuI was developed and applied to the cross-coupling reactions of various N- and O- nucleophilic reagents with aryl iodides and bromides. This strategy featured in the employment of an-proline derived dihydrazides N-oxide compound as the superior supporting ligand. By using this protocol, a variety of products, including N-arylimidazoles, N-arylpyrazoles, N-arylpyrroles, N-arylamines, and aryl ethers, were synthesized with up to 99% yield.
