Synthetic Strategy for Cyclic Amines: A Stereodefined Cyclic N,O-Acetal as a Stereocontrol and Diversity-Generating Element
作者:Haejin Kim、Wontaeck Lim、Donghong Im、Dong-gil Kim、Young Ho Rhee
DOI:10.1002/anie.201206967
日期:2012.11.26
In control: A new syntheticstrategy towards cyclicamines was developed and exploits a stereodefinedcyclicN,O‐acetal as the key stereocontrol and diversity‐generating element. The cyclicN,O‐acetal was prepared from the sequential asymmetric hydroamination of an alkoxyallene with the chiral ligand L*, and ring‐closing metathesis. The stereochemical integrity of the labile N,O‐acetal was conserved
Access to<i>trans</i>-3,4-Dihydroxy-2-alkylpyrrolidines and Piperidines by Use of Stereodefined Cyclic<i>N</i>,<i>O</i>-Acetals as a Diversity-Generating Element
作者:Soyeong Kang、Dong-gil Kim、Young Ho Rhee
DOI:10.1002/chem.201404659
日期:2014.12.1
A highly efficient and stereoselective synthetic pathway towards trans‐3,4‐dihydroxy‐2‐alkylpyrrolidines and piperidines is described. The nature of the protecting groups on the hydroxyl moieties played a crucial role on the trans selectivity. By using this method, a concise total synthesis of (−)‐2‐epilentiginosine has been achieved.