Reaction of Reformatsky Reagents with Substituted Alkyl Esters of 2-Oxochromene-3-carboxylic Acid
摘要:
Reformatsky reagents generated from alkyl esters of bromoacetic, alpha-bromopropionic, alpha-bromobutyric, and alpha-bromoisobutyric acids react with alkyl esters of 6,8-dibromo-2-oxochromene-3-carboxylic acid to form alkyl esters of 6,8-dibromo-4-(1-alkoxycarbonylalkyl)-2-oxochromane-3-carboxylic acid.
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-
由3-溴四氢呋喃-2-酮获得的Reformatskii试剂与6-溴和6,8-二溴-2-氧代铬烯-3-羧酸的烷基酯或烷基酯与3-氧代-3 H的 N-苄基 酰胺 反应 -苯并[ f ]亚甲基-2-羧酸形成6-溴和6,8-二溴-2-氧代-4-(2-氧代四氢呋喃-3-基)苯并-3-羧酸的烷基酯2,3-二氢-3-氧-1-(2-氧四氢呋喃-3-基) -1H- 苯并[ f ]亚甲基-2-羧酸的酯和 N- 苄 基酰胺为两种非对映异构体的混合物。
Reaction of methyl esters of substituted 2-oxochromene-3-carboxylic acids with zinc enolates formed from 1-aryl-2-bromoalkanones
作者:V. V. Shchepin、A. E. Korzun、S. N. Shurov、M. I. Vakhrin、N. Yu. Russkikh
DOI:10.1007/s11176-005-0022-7
日期:2004.9
Zinc enolates formed from 1-aryl-2-bromoalkanones react with methyl esters of substituted 2-oxochromene-3-carboxylic acids to give methyl esters of 6-bromo- or 6,8-dibromo-4-(2-aryl-2-oxo-1-R- ethyl)-2-oxochromane-3-carboxylic acids as mixtures of two diastereomers.