Generation of Interhalogen Fluorides under Mild Conditions: A Comparison of Sluggish and Reactive Interhalogen Fluorides
摘要:
Interhalogen fluorides (XF; X = I, Br, or Cl) generated from xenon difluoride (XeF2) or triethylamine trihydrofluoride (TREAT HF) with iodine (I-2), N-halosuccinimides (NXS; X = I, Br, or CI), or alkylhypohalites (ROX; R = CH3 or t-Bu, X = Br or Cl) with alkenes and aromatics are reported. A comparison of the above reactions with other methods reported in the literature to generate interhalogen fluorides is made. Interhalogens generated from direct action of elemental fluorine (F-2) or XF3 (X = I, Br, or Cl) with chlorine (Cl-2), bromine (Br-2), or iodine (I-2) give a species that can react with electron-deficient alkenes or aromatics. These reagents are too reactive for electron-rich substrates. Interhalogen fluorides from reagents like NXS or ROX with XeF2 or amine HF are much less reactive and give good yields with electron-rich akenes or aromatics.
chosen as standard C4 units of 1,3-diene precursors. The reactions are believed to undergo a unique cutting and insertion process, involving a CC bond cleavage of the enaminone and insertion of a new C(sp2) source with the formation of two C–C single bonds. A broad range of substrates can be used to synthesize the corresponding 1,3-dienes under very mild reaction conditions, including low catalyst-loading
A novel method for synthesis of benzyl alkyl ethers using vanadium-based metal complex catalysts
作者:R. I. Khusnutdinov、A. R. Bayguzina、L. I. Gallyamova、U. M. Dzhemilev
DOI:10.1134/s0965544112040044
日期:2012.7
A novelmethod has been developed for the synthesis of benzyl alkyl ethers in 25–85% yields via the reaction of toluene with alcohols in a CCl4 medium catalyzed by Et3N-activated VO(acac)2.
The compounds having a 4,11-dioxo-3-oxa-8(or 7)-thia-1-azatricyclo[7,2,0,0.sup.2,6 ]undecane-2-carboxylic acid skeleton as the base structure, their esters and their salts are useful antibacterial agents.
The present invention relates to a series of quinazolinone compounds and applications thereof as PI3Kα inhibitors. In particular, the present invention relates to a compound shown in formula (I) and a tautomer or pharmaceutically acceptable salt thereof.