A facile and efficient synthesis of 3,5-disubstituted tetronic acids in aqueous media involving acid-catalyzed intramolecular oxa-pyridylethylation

被引:24
作者
Bi, XH [1 ]
Liu, Q [1 ]
Sun, SG [1 ]
Liu, J [1 ]
Pan, W [1 ]
Zhao, L [1 ]
Dong, DW [1 ]
机构
[1] NE Normal Univ, Dept Chem, Changchun 130024, Peoples R China
关键词
aqueous media; tetronic acid derivatives; alpha-oxo ketene-S; S-acetals; oxa-pyridylethylation; alpha-oxo ketene-N; N-acetals;
D O I
10.1055/s-2004-836034
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
A facile and efficient one-pot synthesis of 3-[bis(alkylthio/alkylamino)methylene]-5-(pyridyl/quinoylmethyl) furan-2,4(3H,5H)-diones 3 and 10, based on a sequential aldol condensation and lactonization reaction between alpha-oxo ketene-S,S-acetals 1 and pyridine/qinoline-carboxaldehydes 2 in aqueous media, has been developed. A mechanism involving an acid-catalyzed intramolecular oxa-pyridylethylation reaction is proposed for the formation of the lactone ring.
引用
收藏
页码:49 / 54
页数:6
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