Summary
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1.
Cinnamaldehyde has been condensed with four amides, in the presence of a trace of pyridine as well as in the absence of any reagent. The yields are on the whole good. The presence of the base does not very much affect the yield.
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2.
The product in all cases is the cinnamylidenebisamide.
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3.
Similarly hydrocinnamaldehyde is also condensed with benzamide and gives a fair yield of the bisamide.
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References
Gupta,J.C.S., 1921,119, 298.
Pandya and Sodhi,Proc. Ind. Acad. Sci, 1938,7, 361.