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   a green and practical method for the synthesis of novel pyrano[2,3-c]pyrazoles and bis-pyrano[2,3-c]pyrazoles using sulfonic acid-functionalized ionic liquid  
   
نویسنده farokhian pegah ,mamaghani manouchehr ,mahmoodi nosrat ollah ,tabatabaeian khalil
منبع journal of the iranian chemical society - 2018 - دوره : 15 - شماره : 1 - صفحه:11 -16
چکیده    An efficient and practical protocol was developed for the synthesis of novel pyrano[2,3-c]pyrazoles and bis-pyrano[2,3-c]pyrazoles by one-pot four-component reaction of arylaldehyde, ethyl acetoacetate, hydrazine hydrate and dimethyl malonate using so3h-functionalized ionic liquid [dmbsi]hso4 as a potential green catalyst under solvent-free condition. the method presented is mild, environmentally friendly, inexpensive and functionality tolerant and produces the desired pyranopyrazoles in short reaction times (17–24 min) and excellent yields (85–95%). in addition, the catalyst can be reused at least ten times without almost any change in its catalytic activity.
کلیدواژه pyranopyrazole ,ionic liquid ,solvent-free ,four-component ,pyrazole
آدرس university of guilan, university campus 2, department of chemistry, iran, university of guilan, faculty of sciences, department of chemistry, iran, university of guilan, faculty of sciences, department of chemistry, iran, university of guilan, faculty of sciences, department of chemistry, iran
 
     
   
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