Synthetic Applications of Azolium Ylides to a Traceless Solid-Phase Synthesis of 2-Substituted Azoles
作者:Yijun Deng、Dennis J. Hlasta
DOI:10.1021/ol0266727
日期:2002.11.1
resin in a traceless fashion is described. Azole substrates II are assembled in a one-pot condensation reaction of azoles and aldehydes with a resin-bound carbamyl chloride. Treatment of the azolyl-carbamate II with borontrifluoride etherate under thermal or microwave-assisted solvolysis conditions afforded 2-substituted azoles. [reaction: see text]
The synthesis of 2-substituted azoles through a one-pot three-component reaction
作者:Yijun Deng、Dennis J. Hlasta
DOI:10.1016/s0040-4039(01)02110-4
日期:2002.1
We have discovered a new reaction whereby 2-substituted azoles are formed in the reaction of an azolium ylide with reactive carbonyl compounds. These products contain a leaving group in the α-position, which on solvolysis in the presence of nucleophiles yield azoles with a variety of α-substituents. We have developed new aspects of this chemistry and expanded the scope to include imidazoles, thiazoles