中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 7-bromo-2,3-dihydro-1H-naphtho[2,1-b]pyran-1-one | 848574-11-8 | C13H9BrO2 | 277.117 |
—— | 2-Formyl-1-oxo-2,3-dihydro-1H-naphtho<2,1-b>pyran | 97625-37-1 | C14H10O3 | 226.232 |
—— | 2-chloromethyl-1H-naphtho<1,2-b>pyran-1-one | —— | C14H11ClO2 | 246.693 |
—— | 2-bromo-2,3-dihydro-1H-naphtho[2,1-b]pyran-1-one | 99515-49-8 | C13H9BrO2 | 277.117 |
—— | 2-dimethylaminomethyl-2,3-dihydro-benzo[f]chromen-1-one | —— | C16H17NO2 | 255.316 |
—— | 2-diethylaminomethyl-2,3-dihydro-benzo[f]chromen-1-one | —— | C18H21NO2 | 283.37 |
—— | 2,3-dihydro-1H-naphtho[2,1-b]pyran | 3722-88-1 | C13H12O | 184.238 |
—— | 1,3-dihydronaphtho[2,1-b]pyran-2-one | 90734-65-9 | C13H10O2 | 198.221 |
—— | (2E)-2-benzylidenebenzo[f]chromen-1-one | —— | C20H14O2 | 286.3 |
—— | (E)-2-(4-methylbenzylidene)-2,3-dihydrobenzo[f]chromen-1-one | 1378465-04-3 | C21H16O2 | 300.357 |
—— | (2E)-2-[(4-chlorophenyl)methylidene]benzo[f]chromen-1-one | 1378464-99-3 | C20H13ClO2 | 320.775 |
—— | (E)-2-(3-bromobenzylidene)-2,3-dihydrobenzo[f]chromen-1-one | 1378465-07-6 | C20H13BrO2 | 365.226 |
—— | 2,3-dihydro-1-hydroxy-1H-naphtho<2,1-b>pyran | 75608-56-9 | C13H12O2 | 200.237 |
—— | (E)-2-(3,4,5-trimethoxybenzylidene)-2,3-dihydrobenzo[f]chromen-1-one | 1378465-03-2 | C23H20O5 | 376.409 |
—— | 2,3-dihydro-benzo[f]chromen-1-one oxime | 107624-92-0 | C13H11NO2 | 213.236 |
—— | 2,2-dideuterio-2,3-dihydro-1H-naphtho<2,1-b>pyran-1-ol | 155221-98-0 | C13H12O2 | 202.221 |
—— | (2,3-Dihydrobenzo[f]chromen-1-ylideneamino)urea | 202605-56-9 | C14H13N3O2 | 255.276 |
—— | 2,3-dihydro-benzo[f]chromen-1-one semicarbazone | —— | C14H13N3O2 | 255.276 |
—— | [(E)-2,3-dihydrobenzo[f]chromen-1-ylideneamino]thiourea | —— | C14H13N3OS | 271.34 |
The mechanism of the Schmidt rearrangement has been examined in the conversion of chromanones to 1,4- and 1,5-benzoxazepinones. With substituents in the 6-, 7-, or 8-position, only electronic effects prevail resulting in the exclusive formation of 1,4-benzoxazepinones. Steric effects come into play with increasing bulk of substituents in the 5-position of the chromanone. Results now presented favor more than one pathway for the products to arise. Nuclear magnetic resonance spectra have been used to distinguish between the isomeric 1,4- and 1,5-benzoxazepinones.Several new chromanones have been synthesized.