Al(III) chloride catalyzed multi-component domino strategy: Synthesis of library of dihydrotetrazolo[1,5- a ]pyrimidines and tetrahydrotetrazolo[1,5- a ]quinazolinones
作者:Parteek Kour、Varun P. Singh、Brijmohan Khajuria、Tajinder Singh、Anil Kumar
DOI:10.1016/j.tetlet.2017.09.052
日期:2017.11
Tetrazolo[1,5-a]pyrimidines are well recognized and valuable scaffolds in drug discovery. In the current manuscript, we demonstrated AlCl3 catalyzed synthesis of series of dihydrotetrazolo[1,5-a]pyrimidines and tetrahydrotetrazolo[1,5-a]quinazolinones via a modified Biginelli type multi-component reaction of 5-aminotetrazole, aldehyde and diverse active methylene components such as acetophenone/al
Tetrazolo [1,5- a ]嘧啶是药物发现中公认的有价值的支架。在当前的手稿中,我们证明了AlCl 3通过5-氨基四唑,醛和多种多样的修饰的Biginelli型多组分反应,催化合成一系列二氢四唑并[1,5- a ]嘧啶和四氢四唑并[1,5- a ]喹唑啉酮。活性亚甲基组分,如苯乙酮/乙酰乙酸烷基酯/二甲酮。这提供了直接从容易获得的起始原料直接构建高度官能化的二氢四唑并[1,5- a ]嘧啶和四氢四唑并[1,5- a ]喹唑啉酮的有效途径。
3-(Propylthio)propane-1-sulfonic acid immobilized on functionalized magnetic nanoparticles as an efficient catalyst for one-pot synthesis of dihydrotetrazolo[1,5-<i>a</i>]pyrimidine and tetrahydrotetrazolo[5,1-<i>b</i>]quinazolinone derivatives
An efficient and reusable catalyst, which is 3-(propylthio)propane-1-sulfonic acid immobillized on functionalized magneticnanoparticles [PTPSA@SiO2-Fe3O4], has been synthesized. For the first time, it is highlighted under solvent-free conditions for the catalytic activity in multicomponent synthesis of dihydrotetrazolo[1,5-a]pyrimidines, dihydrotetrazolo[1,5-a]pyrimidine-6-carboxylates and tetrahydrotetrazolo[5
Nickel (II) coordination on cross-linked poly triazine-urea-sulfonamide grafted onto Mg-Al LDHs: As a green catalytic system for the synthesis of tetrazolo[1,5-a] pyrimidines
Synthesis and tautomerism of 5,7-diaryl-4,7(6,7)-dihydrotetrazolo[1,5a]pyrimidines
作者:V. D. Orlov、S. M. Desenko、N. S. Pivnenko
DOI:10.1007/bf00633502
日期:1988.11
Isoform-Selective and Stereoselective Inhibition of Hypoxia Inducible Factor-2
作者:Thomas H. Scheuermann、Daniel Stroud、Christopher E. Sleet、Liela Bayeh、Cameron Shokri、Hanzhi Wang、Charles G. Caldwell、Jamie Longgood、John B. MacMillan、Richard K. Bruick、Kevin H. Gardner、Uttam K. Tambar
DOI:10.1021/acs.jmedchem.5b00529
日期:2015.8.13
Hypoxia inducible factor (HIF) transcription factors reside at the center of signaling pathways used by mammalian cells to sense and respond to low oxygen levels. While essential to maintain oxygen homeostasis, misregulation of HIF protein activity correlates with tumor development and metastasis. To provide artificial routes to target misregulated HIF activity, we identified small molecule antagonists of the HIF-2 transcription factor that bind an internal cavity within the C-terminal PAS domain of the HIF-2 alpha subunit. Here we describe a new class of chiral small molecule ligands that provide the highest affinity binding, the most effective, isoform-selective inhibition of HIP-2 in cells, and trigger the largest protein conformation changes reported to date. The current results further illuminate the molecular mechanism of HIF-2 antagonism and suggest additional routes to develop higher affinity and potency HIF-2 antagonists.