中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 3,5-diphenyl-2-formyl-6-methyl-4H-pyran-4-one | 500716-71-2 | C19H14O3 | 290.318 |
—— | 2,6-diformyl-3,5-diphenyl-4H-pyran-4-one | 500716-73-4 | C19H12O4 | 304.302 |
—— | 2,6-Bis(brommethyl)-3,5-diphenyl-4-pyranon | 124945-37-5 | C19H14Br2O2 | 434.127 |
—— | 6-bromomethyl-2-dibromomethyl-3,5-diphenyl-4H-pyran-4-one | —— | C19H13Br3O2 | 513.023 |
—— | 16,18-Diphenyl-2,11-dithia<3>metacyclo<3>(2,6)pyranophan-17-on | 124945-41-1 | C27H22O2S2 | 442.602 |
—— | 2,6-dimethyl-3,5-diphenyl-4H-pyran-4-thione | 73499-29-3 | C19H16OS | 292.401 |
We developed a general method for the synthesis of various 2-mono- and 2,6-di-carboxaldehyde substituted derivatives of 3,5-diphenyl-4H-pyran-4-one and 4H-pyran-4-one. 3,5-Diphenyl-6-methyl-4-oxo-4H-pyran-2-carboxaldehyde (4a), 6-methyl-4-oxo-4H-pyran-2-carboxaldehyde (4b), 3,5-diphenyl-4-oxo-4H-pyran-2,6-dicarboxaldehyde (5a), 4-oxo-4H-pyran-2,6-dicarboxaldehyde (5b), 3,5-diphenyl-6-hydroxymethyl-4-oxo-4H-pyran-2-carboxaldehyde (10a), and 6-hydroxymethyl-4-oxo-4H-pyran-2-carboxaldehyde (10b) were obtained from the corresponding di-, tri-, and tetra-bromo derivatives of 2,6-dimethyl-3,5-diphenyl-4H-pyran-4-one (1a) and 2,6-dimethyl-4H-pyran-4-one (1b) by treatment with silver acetate followed by hydrolysis. Compounds 4a and 4b were also obtained by the oxidation of 10a and 10b with barium manganate.Key words: 4H-pyran-4-one, hydroxymethyl and carboxaldehyde derivatives, acetoxylation, hydrolysis, oxidation.