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有機(jī)催化不對(duì)稱(chēng)Mannich反應(yīng)中的熱效應(yīng)
閱讀:2655發(fā)布時(shí)間:2009-7-23
Thermal Effects in the Organocatalytic Asymmetric Mannich Reaction
The proline-catalyzed direct asymmetric Mannich reaction between cyclohexanone, formaldehyde, and various anilines is thermally accelerated. With only 0.5 mol % of catalyst, Mannich products with up to 98% ee have been obtained after a short period of time in reactions performed under microwave irradiation. In situ reduction of the resulting ketones affords N-aryl amino alcohols in up to 86% yield.
有機(jī)催化不對(duì)稱(chēng)Mannich反應(yīng)中的熱效應(yīng)
脯氨酸直接催化不對(duì)稱(chēng)曼尼希反應(yīng)(Mannich Reaction)中的環(huán)己酮(cyclohexanone),,甲醛(formaldehyde),和各種苯胺是熱加速,。只需要0.5mol %的催化劑,在微波輻射下,只要很短的時(shí)間內(nèi)完成反應(yīng)就能得到曼尼希(Mannich)產(chǎn)品達(dá)98 % ee,。原位還原反應(yīng)中, 由酮造成的N -芳基氨基醇(N-aryl amino alcohols)多達(dá)86 %的產(chǎn)量,。
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