59563-87-0Relevant academic research and scientific papers
Several approaches to cyanide ion-catalyzed synthesis of 4-aroyl-1-phenyl-1h-pyrazolo[3,4-d]pyrimidines
Miyashita, Akira,Suzuki, Yumiko,Ohta, Kiyono,Iwamoto, Ken-Ichi,Higashino, Takeo
, p. 407 - 414 (2007/10/03)
- 4-Aroyl-1-phenyl-1H-pyrazolo[3,4-d]pyrimidines (5) were formed in low yields by reaction of 4-chloro-1-phenyl-1H-pyrazolo[3,4-d]pyrimidine (4) with arenecarbaldehydes (3) in the presence of potassium cyanide. Similar reaction of 4-tosyl-1-phenyl-1H-pyra
Synthesis and reactivities of 1,3-dimethyl-2-(α-hydroxy-benzyl)imidazolium and 1,3-dimethyl-2-(α-hydroxybenzyl)benzimidazolium iodides
Miyashita, Akira,Kurachi, Akihito,Matsuoka, Yoshiyuki,Tanabe, Noriko,Suzuki, Yumiko,Iwamoto, Ken-Ichi,Higashino, Takeo
, p. 417 - 426 (2007/10/03)
1,3-Dimethyl-2-(α-hydroxybenzyl)benzimidazolium iodide (3a) was synthesized from 1-methylbenzimidazole (10) through two steps involving lithiation and quaternization. Treatment of 3a with 4-chloro-1-phenyl-1H-pyrazolo[3,4-d]pyrimidine (6) afforded 4-benzoyl-1-phenyl-1H-pyrazolo[3,4-d]pyrimidine (15a). 4-Benzoylquinazoline (14a) and 7-benzoyl-3-phenyl-3H-1,2,3-triazolo[4,5-d]pyrimidine (16a) were given by reaction of 3a with 4-chloroquinazoline (5) and 7-chloro-3-phenyl-3H-1,2,3-triazolo[4,5-d]pyrimidine (7). Treatment of 3a with benzaldehyde (9a) gave benzoin (8a). Similar results were obtained in the reactions of 1,3-dimethyl-2-(α-hydroxybenzyl)imidazolium iodide (4a).
Catalytic action of azolium salts. IV. Preparations of 4-aroylquinazolines and 4-aroyl-1H-pyrazolo[3,4-d]pyrimidines by catalytic action of 1,3-dimethylimidazolium iodide
Miyashita,Matsuda,Suzuki,Iwamoto,Higashino
, p. 2017 - 2022 (2007/10/02)
The ability of 1,3-dimethylimidazolium iodide (1) to catalyze the aroylation of the chloroheteroarenes 4-8 with arenecarbaldehydes 3 as sources of the aroyl groups was examined in order to develop a preparative method of aroylheteroarenes. In the presence
