Asymmetric Domino Nitro-Michael/Horner-Wadsworth-Emmons Reaction for Disubstituted Cyclohexenecarboxylate Annulation: Efficient Synthesis of Dipeptidyl Peptidase IV Inhibitor ABT-341 and Influenza Neuraminidase Inhibitor
作者:Jiang Weng、Jun-Ming Li、Feng-Quan Li、Zhi-Sheng Xie、Gui Lu
DOI:10.1002/adsc.201200093
日期:2012.7.9
An asymmetricdomino nitro‐Michael/Horner–Wadsworth–Emmons (HWE) reaction involving α,β‐unsaturated aldehydes and nitro phosphonates has been developed, which gave 4,5‐disubstitutedcyclohexenecarboxylates with high stereoselectivities (dr up to >20:1, ee 83–92%) in good yields (44–76%). Furthermore, using this methodology as a key step, a short and practical synthesis of pharmaceutically useful compounds
One‐Pot High‐Yielding Synthesis of the DPP4‐Selective Inhibitor ABT‐341 by a Four‐Component Coupling Mediated by a Diphenylprolinol Silyl Ether
作者:Hayato Ishikawa、Masakazu Honma、Yujiro Hayashi
DOI:10.1002/anie.201006204
日期:2011.3.14
A dream come true: ABT‐341 was synthesized in high yield with excellent diastereo‐ and enantioselectivity in a one‐pot process mediated by a diphenylprolinolsilylether (see scheme; TMS=trimethylsilyl). Thus, an asymmetric Michael reaction, a domino Michael/Horner–Wadsworth–Emmons reaction combined with a retro‐aldol reaction, base‐catalyzed isomerization, amide‐bond formation, and reduction of the