<i>N</i>-Sulfinyl β-Amino Weinreb Amides: Synthesis of Enantiopure β-Amino Carbonyl Compounds. Asymmetric Synthesis of (+)-Sedridine and (−)-Allosedridine
作者:Franklin A. Davis、Kavirayani R. Prasad、M. Brad Nolt、Yongzhong Wu
DOI:10.1021/ol034119z
日期:2003.3.1
[reaction: see text] N-Sulfinyl beta-amino Weinreb amides are prepared by condensation of sulfinimines with the potassium enolate of N-methoxy-N-methylacetamide. These new chiral building blocks are useful for the asymmetric synthesis of beta-amino carbonyl compounds, as illustrated here by the concise enantioselective syntheses of sedum alkaloids (+)-sedridine and (-)-allosedridine.
[反应:见正文] N-亚磺酰基β-氨基Weinreb酰胺是通过亚磺胺与N-甲氧基-N-甲基乙酰胺的烯醇钾缩合制备的。这些新的手性结构单元可用于β-氨基羰基化合物的不对称合成,如本文所述的景天生物碱(+)-三氢吡啶和(-)-亚乙基吡啶的简明对映选择性合成所示。