Organocatalyzed enantioselective aldol reaction of 1H-pyrrole-2,3-diones.
Organocatalyzed enantioselective aldol reaction of 1H-pyrrole-2,3-diones.
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DOI:
10.1016/j.tetlet.2011.11.056
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发表时间:
2012-01-18
影响因子:
1.8
通讯作者:
Zhao, Cong-Gui
中科院分区:
文献类型:
--
作者:
Bhanushali, Mayur;Zhao, Cong-Gui
关键词:
The enantioselective cross aldol reaction of 1-benzyl 4,5-dioxo-2-aryl-4,5-dihydro-1H-pyrrole-3-carboxylates and ketones was studied with proline derivatives or cinchona alkaloid-derived primary amines as the catalysts for the first time. trans-4-Benzoyloxy-L-proline (15) was found to be the best catalyst for acyclic ketones. For cyclohexanone, the best results were achieved with 9-deoxy-9-epi-aminoquinine (18) as the catalyst in the presence of racemic 1,1'-binaphthyl-2,2'-diyl hydrogen phosphate (19) as the cocatalyst. Using these protocols, 3-alkyl-3-hydroxy-1H-pyrrol-2(3H)-one derivatives were obtained in excellent yields and good to high ee values (up to 94% ee).
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影响因子:
5.2
作者:
Font, Daniel;Sayalero, Sonia;Pericas, Miquel A.
通讯作者:
Pericas, Miquel A.
DOI:
10.1055/s-0030-1260029
发表时间:
2011-06
期刊:
Synthesis
影响因子:
--
作者:
Bhanushali M;Zhao CG
通讯作者:
Zhao CG
影响因子:
16.6
作者:
Hayashi, Y;Sumiya, T;Shoji, M
通讯作者:
Shoji, M
影响因子:
--
作者:
Fu, Yu-Qin;Li, Zai-Chun;Tang, Ming-Sheng
通讯作者:
Tang, Ming-Sheng
影响因子:
16.6
作者:
Hayashi, Yujiro;Yasui, Yusuke;Ishikawa, Hayato
通讯作者:
Ishikawa, Hayato