1360614-10-3Relevant articles and documents
Nano-cellulose/BF3/Fe3O4: a magnetic bio-based nano-catalyst for the synthesis of pyrimido[2,1-b]benzothiazoles under solvent-free conditions
Mirjalili, Bi Bi Fatemeh,Aref, Fatemeh
, p. 4519 - 4531 (2018)
Abstract: Nano-cellulose/BF3/Fe3O4 is a bio-based and eco-friendly catalyst with high catalytic activity. Easy separation with an external magnet and recyclability without significant loss of its activity are some advantag
Combining photo-redox and enzyme catalysis for the synthesis of 4H-pyrimido[2,1-b] benzothiazole derivatives in one pot
Yu, Yuan,Lu, Wei-Fan,Yang, Zeng-Jie,Wang, Na,Yu, Xiao-Qi
, (2020/12/25)
A novel strategy combining visible-light and enzyme catalysis in one pot for the synthesis of 4H-pyrimido[2,1-b] benzothiazole derivatives from alcohols is described for the first time. Fourteen 4H-pyrimido[2,1-b] benzothiazole derivatives were prepared with yields of up to 98% under mild reaction conditions by a simple operation. The photoorgano catalyst rose Bengal (rB) was employed to oxyfunctionalise alcohols to aldehydes. Compared with aldehydes, alcohols with more stable properties and lower cost, thus we used photocatalysis to oxidize alcohols into aldehydes. Next, the enzyme was used to further catalyze the reaction of Biginelli to produce the target product of 4H-pyrimidine [2,1-b] benzothiazole. Experimental results show that this method provides a more efficient and eco-friendly strategy for the synthesis of 4H-pyrimido[2,1-b] benzothiazole derivatives.
Multicomponent reaction-based discovery of pyrimido[2,1-b][1,3]benzothiazole (PBT) as a novel core for full-color-tunable AIEgens
Gong, Shan-Shan,Kong, Rui,Zheng, Chunhong,Fan, Congbin,Wang, Chengjun,Yang, Dong-Zhao,Chen, Zhen-Zhen,Duo, Shuwang,Pu, Shouzhi,Sun, Qi
supporting information, p. 10029 - 10036 (2021/08/21)
The Hf(OTf)4-catalyzed three-component reaction (3CR) was employed as a powerful tool for facile access to a library of 23 pyrimido[2,1-b][1,3]benzothiazole (PBT)-based AIEgens with full-color tunability, solid-state fluorescence quantum yields
Nano-Co-[4-chlorophenyl-salicylaldimine-pyranopyrimidine dione]Cl2 as a new Schiff base complex and catalyst for the one-pot synthesis of some 4H-pyrimido[2,1-b]benzazoles
Moosavi-Zare, Ahmad Reza,Goudarziafshar, Hamid,Fashi, Parva
, p. 5567 - 5582 (2020/10/12)
Abstract: Nano-Co-[4-clolorophenyl-salsylaldimine-pyranopyrimidine dione]Cl2 {Nano-[Co-4CSP]Cl2} was prepared and fully characterized as a new nano-Schiff base complex. Nano-[Co-4CSP]Cl2 was successfully used as an efficie