83548-84-9Relevant academic research and scientific papers
An efficient synthesis of 3-bromoflavones under solvent free conditions using grinding technique
Jakhar, Komal,Makrandi
, p. 770 - 773 (2012/06/30)
Selective bromination of 1-(2-hydroxyphenyl)-3-phenylpropane- 1,3-diones has been carried out with ammonium bromide and ammonium persulphate at room temperature using grinding technique under solvent free conditions to give 2-bromo derivatives which on cyclodehydration with p-toluenesulphonic acid under grinding conditions give 3-bromoflavones. Also, flavones on bromination using above mentioned conditions give 3-bromoflavones directly.
Selective halogenation of 1-(2-hydroxyphenyl)-3-phenylpropane-1,3-diones using phase transfer catalysis and synthesis of 3-chloro- and 3-bromo-flavones
Makrandi,Shashi,Kumar, Surender
, p. 895 - 896 (2007/10/03)
Selective chlorination and bromination of 1-(2-hydroxyphenyl)-3-phenylpropane-1,3-diones have been achieved by their reaction with ammonium chloride/ammonium bromide and hydrogen peroxide in biphase medium using phase transfer catalysis.
Synthesis of 4-Bromo-3-(2'-hydroxyphenyl)-1,5-diphenylpyrazolines and Pyrazoles
Joshi, M. G,Wadodkar, K. N.
, p. 689 - 690 (2007/10/02)
3-(2'-Hydroxyphenyl)-1,5-diphenylpyrazolines (Ia-e) react with NBS in CCl4 to give 4-bromo-3-(2'-hydroxyphenyl)-1,5-diphenyl-pyrazolines (IIa-e) whereas α-bromo-2-hydroxydibenzoylmethanes (IVa-e) react with phenylhydrazine in boiling ethanol to afford 4-b
