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- W2949511420 abstract "Synthesis of αβ-unsaturated acids is of current interests they being essential unit of a variety of substances of natural origin like fruits, foods, pheromones, and some pesticides too 1,2 . This seems to be reason these molecules are being pursued for their efficient production, so the new synthetic methods for their production. The classical method of limited scope is Perkin reaction 3 which is not explored further as it does not seem to be applicable large molecular diversity. Straightforward approach to these unsaturated acids appears to be Doebner Modification of Knoevenagel reaction 4 employing aromatic aldehydes, malonic acid and pyridine and certainly this route is fairly large in scope with few exceptions. Obviously, this and other used strong organic bases 5 are carcinogenic and very harmful to humans, environment as well. So, several other alternative procedures are developed using graphite 6 , BBr3 (Ref 7), piperidine acetate 8 , etc. Clearly, several of these processes are not mild, inexpensive, green hence a new process is highly desirable. Alum is cheap, household material and is inexpensive have already found use in prominent organic reactions such as Biginelli 9 , Pechmann 10" @default.
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- W2949511420 date "2011-10-01" @default.
- W2949511420 modified "2023-09-23" @default.
- W2949511420 title "Alum [KAl(SO 4 ) 2 .12H 2 O]: An efficient, novel, clean, catalyst for Doebner Knoevenagel reaction for the efficient production of -unsaturated acids" @default.
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