Asymmetric Synthesis of β-Amino Carbonyl Compounds with <i>N</i>-Sulfinyl β-Amino Weinreb Amides
作者:Franklin A. Davis、M. Brad Nolt、Yongzhong Wu、Kavirayani R. Prasad、Danyang Li、Bin Yang、Kerisha Bowen、Seung H. Lee、John H. Eardley
DOI:10.1021/jo0402780
日期:2005.3.1
readily add to enantiopure N-sulfinyl β-aminoWeinrebamides providing the corresponding, stable, N-sulfinyl β-amino carbonyl compounds in good to excellent yields. This new methodology represents a general solution to the problem of β-amino carbonyl syntheses, which are important chiral building blocks and constituents of natural products. N-Sulfinyl β-aminoWeinrebamides are prepared by reaction of the
Asymmetric Synthesis of Acyclic 1,3-Amino Alcohols by Reduction of <i>N</i>-Sulfinyl β-Amino Ketones. Formal Synthesis of (−)-Pinidinol and (+)- Epipinidinol
作者:Franklin A. Davis、Paul M. Gaspari、Brad M. Nolt、Peng Xu
DOI:10.1021/jo801653c
日期:2008.12.19
Stereoselective reduction of acyclic N-sulfinyl beta-amino ketones with (LiEt(3)BH) and Li(t-BuO)(3)AlH, respectively, gave anti- and syn-1,3-amino alcohols with excellent selectivity. A formal asymmetric synthesis of the hydroxy piperidine alkaloids (-)-pinidinol and (+)-epipinidinol from a common N-sulfinyl beta-amino ketone ketal precursor was developed. The pinidinol piperidine ring was formed