Selective C-monomethylation in 1-(2-hydroxyphenyl)-3-phenylpropane-1,3-diones and synthesis of 3-methylflavones
1-(2-Hydroxyphenyl)-3-phenylpropane-1,3-diones (Ia-f) on reaction with methyl iodide in benzene-aq. potassium carbonate biphase medium in the presence of tetra-n-butylammonium hydrogen sulphate as phase transfer catalyst give 2-methyl-1-(2-methoxyphenyl)-
Makrandi, J K,Kumari, Vandna
p. 1142 - 1144
(2007/10/02)
Mono-C-methylation of β-Dicarbonyls with Dimethyl Sulphate and Potassium Carbonate
Methylation of β-dicarbonyls, RCOCH2COR' where R and R' are substituted or unsubstituted phenyl groups, with dimethyl sulphate and potassium carbonate results in the formation of mono-C-methyl derivatives at the active methylene group.
Raju, N. Ranga,Murthy, M. Sreerama,Rao, E. Venkata
p. 258 - 259
(2007/10/02)
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