N-Arenesulfonyl-2-aminomethylpyrrolidines Novel Modular Ligands and Organocatalysts for Asymmetric Catalysis
作者:Nils Dahlin、Anders Bøgevig、Hans Adolfsson
DOI:10.1002/adsc.200404098
日期:2004.8
A novel series of (S)-N-arenesulfonyl-2-aminomethylpyrrolidines were prepared in high overall yield starting from N-Boc-L-proline. The mono-sulfonyldiamines were evaluated as organocatalysts in the asymmetric α-amination of propanal using diethyl azadicarboxylate (DEAD) as the amine source. The initially formed α-aminated aldehyde was reduced in situ to the corresponding N-aminooxazolidinone, which
从N -Boc-L-脯氨酸开始,以高总收率制备了一系列新的(S)-N-芳烃磺酰基-2-氨基甲基吡咯烷。使用氮杂二羧酸二乙酯(DEAD)作为胺源,对丙醛的不对称α-胺化反应中的有机磺酰二胺进行了评估。将最初形成的α-胺基醛原位还原为相应的N-氨基恶唑烷酮,以中等至高产率获得了高达87%ee的氮。