31730-65-1Relevant articles and documents
Heterogeneous selective synthesis of 1,2-dihydro-1,3,5-triazines from alcohols and amidines via Cu/OMS-2-catalyzed multistep oxidation
Meng, Xu,Bi, Xiuru,Wang, Yanmin,Chen, Gexin,Chen, Baohua,Jing, Zhenqiang,Zhao, Peiqing
, p. 34 - 39 (2017)
Copper supported on octahedral manganese oxide molecular sieve (OMS-2) which was obtained via reducing KMnO4 by TBHP was prepared and found to be an efficient catalyst for the synthesis of 1,2-dihydro-1,3,5-triazines directly from alcohols and amidines in one-pot via multistep oxidation. The recyclable heterogeneous catalyst was characterized by BET, XRD, FTIR, TEM and SEM, and the catalytic system can tolerate a wide range of substrates under air with low catalyst loading of supported copper (0.25?mol%), employing OMS-2 as the electron-transfer mediator (ETM) and support.
Copper-Catalyzed Three-Component Cascade Reaction of Benzaldehyde with Benzylamine and Hydroxylamine or Aniline: Synthesis of 1,2,4-Oxadiazoles and Quinazolines
Wang, Chao,Rui, Xiyan,Si, Dongjuan,Dai, Rupeng,Zhu, Yueyue,Wen, Hongmei,Li, Wei,Liu, Jian
supporting information, p. 2825 - 2833 (2021/04/26)
The analogous three-component synthesis strategy for substituted 1,2,4-oxadiazole and quinazoline derivatives from readily available benzaldehyde, benzylamine and hydroxylamine or aniline has been developed. Both the cascade reaction sequences involves nucleophilic addition of C?N bond, introduction a halogen donor, nucleophilic substitution and Cu(II)-catalyzed aerobic oxidation. This synthesis methodology demonstrated good yields, broad substrate scope and oxygen as a green oxidant. Thus, this synthesis protocol provides strategies for the construction of substituted 1,2,4-oxadiazole and quinazolines from readily and simple starting materials. (Figure presented.).
Sulfur-Mediated Decarboxylative Coupling of 2-Nitrobenzyl Alcohols and Arylacetic Acids
Le, Ha V.,Nguyen, Duyen K.,Nguyen, Khang X.,Nguyen, Tung T.,Pham, Phuc H.,Phan, Nam T. S.
supporting information, p. 1112 - 1116 (2020/07/04)
We report a new method for the synthesis of substituted quinazolines by the condensation of 2-nitrobenzyl alcohols with arylacetic acids. The transformation requires the use of urea as a nitrogen source, elemental sulfur as a promoter, DABCO as a base, and DMSO as a solvent. Functionalities such as chloro, fluoro, trifluoromethyl, thienyl, and indolyl groups were all compatible with the reaction conditions. Because our method uses stable simple substrates to obtain the N,N-heterocycles in the absence of transition metals, it offers a potential pathway for preparing complex structures under mild conditions.