32040-07-6Relevant articles and documents
Synthesis of N-heterocyclic carbene-Pd(II)-5-phenyloxazole complexes and initial studies of their catalytic activity toward the Buchwald-Hartwig amination of aryl chlorides
Zhang, Zhi-Mao,Xu, Yu-Ting,Shao, Li-Xiong
, (2021/04/19)
Three new N-heterocyclic carbene (NHC)-Pd(II) complexes using 5-phenyloxazole as the ancillary ligand have been obtained in moderate to good yields by a one-pot reaction of the corresponding imidazolium salts, palladium chloride and 5-phenyloxazole under mild conditions. Initial studies showed that one of the complexes is an efficient catalyst for the Buchwald-Hartwig amination of aryl chlorides with various secondary and primary amines under the varied catalyst loading of 0.01-0.05 mol%, thus it will enrich the chemistry of NHCs and give an alternative catalyst for the coupling of challenging while cost-low aryl chlorides.
Tropane alkaloid compounds and method of manufacturing using sequential oxidation reactions
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Paragraph 0098; 0110-0114, (2020/06/16)
The present invention relates to a tropane alkaloid compound sequentially using an oxidative Mannich ring reaction and a method for producing the same. The present invention provides a tropane alkaloid compound having a structure of chemical formula 1 in
Phosphoryl chloride-mediated solvent-free synthesis of N-aryl-substituted azacycles from arylamines and cyclic ethers
Tran, Van Hieu,La, Minh Thanh,Kim, Hee-Kwon
supporting information, p. 1860 - 1863 (2019/06/19)
A solvent- and metal-free protocol for preparation of N-aryl substituted azacycles from arylamines and cyclic ethers is described. In this method, the combination of POCl3 and DBU is crucial for conversion of arylamines and cyclic ethers to five- and six-membered azacycles. Without solvent, a variety of N-aryl-substituted, five-membered azacycles (pyrrolidines, 2-methylpyrrolidines, and piperidine) and six-membered azacycles (isoindolines and tetrahydroisoquinolines) are synthesized in high yields. This green method provides a sustainable and efficient approach for the preparation of azacycles from various cyclic ethers.