Synthesis of 2-Hydroxy-5-Arylselanyl-Benzoates by [3+3] Cyclocondensation of 1,3-Bis(Silyloxy)-1,3-Butadienes with 2-Arylseleno-3-Silyloxy-Alk-2-en-1-Ones
Functionalized diaryl selenides were prepared by the first [3+3] cyclizations of 1,3-bis(trimethylsilyloxy)-1,3-butadienes with organoselenium compounds (i.e., 2-(phenylselanyl)-3-silyloxy-3-en-1-ones).
Synthesis of 5-(Arylselanyl)-2-(arylsulfanyl)benzoates by [3+3] Cyclocondensation of 3-(Arylsulfanyl)-1-(silyloxy)buta-1,3-dienes with 2-(Arylselanyl)-3-(silyloxy)alk-2-en-1-ones
作者:Inam Iqbal、Muhammad Imran、Peter Langer
DOI:10.1002/hlca.201000110
日期:——
Functionalized 5‐(arylselanyl)‐2‐(arylsulfanyl)benzoates were prepared by [3+3] cyclocondensation of 3‐(arylsulfanyl)‐1‐(silyloxy)buta‐1,3‐dienes with 2‐(arylselanyl)‐3‐(silyloxy)‐alk‐2‐en‐1‐ones.
Synthesis of 4-Arylselanylpyrazoles Through Cyclocondensation Reaction Using Glycerol as Solvent
作者:José E. R. Nascimento、Daniela H. de Oliveira、Paola B. Abib、Diego Alves、Gelson Perin、Raquel G. Jacob
DOI:10.5935/0103-5053.20150127
日期:——
We describe here a simple method to synthesize 4-arylselanylpyrazoles by reaction of alpha-arylselanyl-1,3-diketones with arylhydrazines using glycerol as solvent at 60 degrees C under N-2 atmosphere. This is a direct cyclocondensation reaction performed with alpha-arylselanyl-1,3-diketones and arylhydrazines bearing electron-withdrawing and electron-donating groups affording the corresponding 4-arylselanylpyrazoles in moderate to good yields.