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 novel two-dimensional metal-organic framework as a recyclable heterogeneous catalyst for the dehydrogenative oxidation of alcohol and theN-arylation of azole compounds
Liu, Chengxin,Cui, Jin,Wang, Yufang,Zhang, Mingjie
, p. 11739 - 11744 (2021/03/31)
A novel metal-organic framework (MOF) with two-dimensional (2D) crystal structure was developed using Cu(NO3)2·3H2O and 2,2′,5,5′-tetramethoxy-[1,1′-biphenyl]-4,4′-dicarboxylic acid. Further, its structure was characterized using infrared spectroscopy, thermogravimetry, X-ray diffraction, and X-ray crystallography. The activated Cu-MOF was used to catalyze the dehydrogenative oxidation of alcohol andN-arylation of azole compounds. Furthermore, it could be easily recovered and reused.
A solvent-free manganese(II) -catalyzed Clauson-Kaas protocol for the synthesis of N-aryl pyrroles under microwave irradiation
Anilkumar, Gopinathan,Meera, Gopinadh,Rohit, Kizhakkekuttu Radhakrishnan
supporting information, (2021/10/12)
The first manganese-catalyzed modified Clauson-Kaas reaction for N-substituted pyrrole synthesis using 2,5-dimethoxytetrahydrofuran with variously substituted aromatic amines has been developed (up to 89% yield). This interesting neat strategy is free from additives including co-catalysts, ligands, and acids. Relatively low cost, environmentally benign, and handy Mn(NO3)2·4H2O is employed as the catalyst under microwave conditions with a very short reaction time (20?min). The above qualities attest to the green nature of this reaction.
