Reformatsky Reaction of Methyl -Bromoisobutyrate with 2-Oxo-2H-benzo[f]chromene-3-carboxylic Acid Esters and N-Benzylamide
摘要:
Reformatsky reagent derived from methyl alpha-bromoisobutyrate reacts with methyl and ethyl 2-oxo-2H-benzo[f]chromene-3-carboxylates and N-benzyl-2-oxo-2H-benzo[f]chromene-3-carboxamide to afford the corresponding derivatives of 4-(1-methyl-1-methoxycarbonylethyl)-2-oxo-3,4-dihydro-2H-benzo[f]chromene-3 carboxylic acid as a single stereoisomer.
死SYNTHESE sowie模具physikalischen Eigenschaften DER香豆素Abkömmlinge 5A - d,7α - d UND 11 AUS巢穴Azomethinen 1A - d UND 6A - d werden beschrieben。第三人以thermische Umsetzung冯5B - d奥德7B MIT 2,3-二甲基-1,3-丁二烯werden模具neuen Cycloaddukte 12A - Ç bzw. 13 gebildet,während图5c,d奥德7B MIT 1,2-双(亚甲基)环己模具Polycyclen 15A,bbzw。14 ergeben。
Reaction of the Reformatskii reagent obtained from bromotetrahydrofuran-2-one with 2-oxochromene-3-carboxylic or 3-oxo-3H-benzo[f]chromene-2-carboxylic acid derivatives
作者:V. V. Shchepin、D. V. Fotin、S. N. Shurov
DOI:10.1007/s11176-005-0020-9
日期:2004.9
The Reformatskii reagent obtained from 3-bromotetrahydrofuran-2-one reacts with alkyl esters of 6-bromo- and 6,8-dibromo-2-oxochromene-3-carboxylic acid or alkyl esters and N -benzylamide of 3-oxo-3 H -benzo[ f ]chromene-2-carboxylic acid to form alkyl esters of 6-bromo- and 6,8-dibromo-2-oxo-4-(2-oxotetrahydrofuran-3-yl)chroman-3-carboxylic acid or alkyl esters and N -benzylamide of 2,3- dihydro-