A novel method to access chiral nonnatural 2,4-disubstituted pyrrolidines from aldehydes and nitroolefins only with an α-substituent
作者:Bo Zheng、Hui Wang、Yong Han、Changlu Liu、Yungui Peng
DOI:10.1039/c3cc40583d
日期:——
A series of α-substituted nitroolefins were employed in organocatalytic asymmetric Michael reactions with aldehydes. γ-Nitro carbonyl products were achieved in good yields (up to 86%) with good stereoselectivities (up to 96% ee and 24â:â1 dr). Reduction of the nitro group followed by intramolecular reductive amination successfully afforded various novel optically active 2,4-disubstituted pyrrolidine compounds.
一系列α-取代硝基烯与醛在有机催化不对称Michael反应中被应用。得到了产率良好(高达86%)且立体选择性良好的γ-硝基羰基产物(高达96% ee和24:1 dr)。经过硝基还原后再进行分子内还原胺化,成功合成了多种新型光学活性的2,4-二取代吡咯烷化合物。