97301-06-9Relevant articles and documents
Stereoselective synthesis of trans-β-substituted γ-ferrocenyl- γ-butyrolactones via ammonium ylides
Shi, Ling,Han, Yao,Yang, Zhanjun,Liu, Weimin,Liang, Yongmin
, p. 2851 - 2856 (2005)
trans-β-substituted γ-ferrocenyl-γ-butyrolactones were prepared via the reaction of quaternary ammonium salts with electron-deficient trisubstituted alkene 1 under the optimum conditions. Moderate to good yields and excellent trans stereoselectivity were achieved for the new compounds 2-10. The X-ray crystal structure of 2a was determined and all the products were characterized by 1H NMR, 13C NMR, FAB-MS, IR and HRMS spectra. Georg Thieme Verlag Stuttgart.
A facile synthesis of highly functionalized dihydrofurans based on 1,4-diazabicyclo[2.2.2]octane (DABCO) catalyzed reaction of halides with enones
Yang, Zhanjun,Fan, Mingjin,Mu, Ruizhu,Liu, Weimin,Liang, Yongmin
, p. 9140 - 9146 (2007/10/03)
Treatment of halides 5 with electrophilic alkenes 2 afforded the corresponding dihydrofurans 3 and 4 in the presence of 1, 4-diazabicyclo[2.2.2] octane (DABCO) with good to excellent yields and in a stereoselective manner in most cases. Moreover, the ster
DIAZABICYCLOALKANES WITH NITROGEN ATOMS AT THE NODAL POSITIONS. 12. STEPHENS REARRANGEMENT IN SUBSTITUTED 1,4-DIAZABICYCLOOCTANES
Vysochin, V. I.,Shishkin, G. V.
, p. 559 - 563 (2007/10/02)
The ylides formed from phenacyl derivatives of substituted diazabicyclooctanes decompose to the initial base or give products of the Stephens rearrangement, leading to an expansion of the ring.The direction of the reaction is determined by the presence of
