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A Mild and Efficient Procedure for the Preparation of Chromone-2-carboxylates 被引量:1
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作者 Juan Hong YU Yu She YANG Ru Yun JI 《Chinese Chemical Letters》 SCIE CAS CSCD 2006年第8期1005-1008,共4页
A mild and efficient procedure to build up various chromone-2-carboxylates was developed. Condensation of diverse 2-hydroxyacetophones with tetr-butyl oxalate in the presence of sodium ethoxide could be accomplished r... A mild and efficient procedure to build up various chromone-2-carboxylates was developed. Condensation of diverse 2-hydroxyacetophones with tetr-butyl oxalate in the presence of sodium ethoxide could be accomplished rapidly under mild condition. Cyclodehydration was carried out to achieve chromone-2-carboxylates in one-pot with impressive yield. Advantages over conventional methods with diethyl oxalate were observed in yield and reaction time. 展开更多
关键词 Chromone-2-carboxylates tea-butyl ethyl oxalate diethyl oxalate.
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