sodium salt of (2S)-bornane-2,10-sultam 在
silver-graphite 、 草酰氯 、 苯甲醛 、 锌 作用下,
以
四氢呋喃 为溶剂,
反应 2.0h,
生成 1,6-Bis-((1R,5S,7S)-10,10-dimethyl-3,3-dioxo-3λ6-thia-4-aza-tricyclo[5.2.1.01,5]dec-4-yl)-2,5-dimethylene-hexane-1,6-dione
参考文献:
名称:
Enantioselective Dreiding-Schmidt reactions: asymmetric synthesis and analysis of α-methylene-γ-butyrolactones
摘要:
The zinc/silver-graphite mediated Dreiding-Schmidt reactions between aldehydes and the 2-bromomethyl-acrylate derived sultamamides (+)/(-)-28 or (+)/(-)-30 gave the corresponding substituted alpha-methylene-gamma-butyrolactones with ee's up to 90%. Enantiomerically pure compounds were obtained by semipreparative HPLC using a chiral stationary phase. (C) 1997 Elsevier Science Ltd.
The discovery, synthesis and biological activity of a series of triarylethane phosphodiesterase 4 inhibitors is described. Structure-activity relationship studies are presented for CDP840 29), a potent, chiral, selective inhibitor of PDE 4 (IC50 4nM). CDP840 is non-emetic in the ferret at 30 mg kg(-1) (po), active in models of inflammation and reverses ozone-induced bronchial hyperreactivity in the guinea pig. (C) 2002 Elsevier Science Ltd. All rights reserved.
Aminomethylation of chiral silyl enol ethers: access to β2-homotryptophane and β2-homolysine derivatives
We describe here the aminomethylation of chiral silyl enol ether derivatives using iminium ion. The choice of judicious precursors with adequate protecting groups for the silylation/aminomethylation step was required to achieve the synthesis of beta(2)-homotryptophane in few steps. The same methodology was used to prepare a beta(2)-homolysine derivative. (C) 2008 Elsevier Ltd. All rights reserved.
Enantioselective Dreiding-Schmidt reactions: asymmetric synthesis and analysis of α-methylene-γ-butyrolactones
The zinc/silver-graphite mediated Dreiding-Schmidt reactions between aldehydes and the 2-bromomethyl-acrylate derived sultamamides (+)/(-)-28 or (+)/(-)-30 gave the corresponding substituted alpha-methylene-gamma-butyrolactones with ee's up to 90%. Enantiomerically pure compounds were obtained by semipreparative HPLC using a chiral stationary phase. (C) 1997 Elsevier Science Ltd.