Synthesis and characterization of hydrophilic theophylline base compounds and their use as ligands in the microwave assisted Suzuki–Miyaura couplings of halopyridines in water
摘要:
Xanthine derivatives, caffeine (L1), theobromine (L2), theophylline (L3), 7-(beta-hydroxyethyltheophylline) (L4), (7-(2,3-dihydroxypropyl)theophylline) (L5), and theophylline 7-acetic acid (L6) and the acetylated derivatives of the later three (L7-L9) were employed as ligands for the in situ palladium catalyzed Suzuki-Miyaura cross couplings of a series of halogenated pyridines. Optimized conditions were found where the diacetylated ligand (1.8) was determined to be the best for this process, producing good to excellent yields in the couplings of halogenated anilines with phenylboronic acid under mild reaction conditions in water using microwave irradiation. (C) 2014 Elsevier Ltd. All rights reserved.
Synthesis and characterization of hydrophilic theophylline base compounds and their use as ligands in the microwave assisted Suzuki–Miyaura couplings of halopyridines in water
摘要:
Xanthine derivatives, caffeine (L1), theobromine (L2), theophylline (L3), 7-(beta-hydroxyethyltheophylline) (L4), (7-(2,3-dihydroxypropyl)theophylline) (L5), and theophylline 7-acetic acid (L6) and the acetylated derivatives of the later three (L7-L9) were employed as ligands for the in situ palladium catalyzed Suzuki-Miyaura cross couplings of a series of halogenated pyridines. Optimized conditions were found where the diacetylated ligand (1.8) was determined to be the best for this process, producing good to excellent yields in the couplings of halogenated anilines with phenylboronic acid under mild reaction conditions in water using microwave irradiation. (C) 2014 Elsevier Ltd. All rights reserved.
El Ashry, El Sayed H.; Rashed, Nagwa; Awad, Laila F., Journal of Chemical Research, Miniprint, 2001, # 4, p. 440 - 450
作者:El Ashry, El Sayed H.、Rashed, Nagwa、Awad, Laila F.、Abdel-Rahman, Adel A. H.、Rasheed, Hanna A.
DOI:——
日期:——
Satoda et al., Yakugaku Kenkyu, 1956, vol. 28, p. 609,611, 612
作者:Satoda et al.
DOI:——
日期:——
Synthesis and characterization of hydrophilic theophylline base compounds and their use as ligands in the microwave assisted Suzuki–Miyaura couplings of halopyridines in water
作者:Patricia Conelly-Espinosa、Ruben A. Toscano、David Morales-Morales
DOI:10.1016/j.tetlet.2014.08.103
日期:2014.10
Xanthine derivatives, caffeine (L1), theobromine (L2), theophylline (L3), 7-(beta-hydroxyethyltheophylline) (L4), (7-(2,3-dihydroxypropyl)theophylline) (L5), and theophylline 7-acetic acid (L6) and the acetylated derivatives of the later three (L7-L9) were employed as ligands for the in situ palladium catalyzed Suzuki-Miyaura cross couplings of a series of halogenated pyridines. Optimized conditions were found where the diacetylated ligand (1.8) was determined to be the best for this process, producing good to excellent yields in the couplings of halogenated anilines with phenylboronic acid under mild reaction conditions in water using microwave irradiation. (C) 2014 Elsevier Ltd. All rights reserved.