Synthesis of New Pyrano[2,3-<Emphasis Type="Italic">d</Emphasis>]Pyrazoles and Furochromones Derivatives Utilizing Amino Acids Derivatives |
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Authors: | N?M?Fawzy A?M?Shalaby Email author" target="_blank">M?E?A?ZakiEmail author |
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Institution: | 1.National Research Centre,Dokki, Cairo,Egypt |
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Abstract: | Hydrolysis of oxazolone derivatives (2b) yielded α-khellinoyl(amino)-cinnamic acid (3) as a good precursor to react with ethyl esters of glycine, L-methionine, and glycylglycine affording 4, 5, and 4, 5 respectively with minor product 7. Hydrolysis of oxazolone derivatives (2b) afforded α,β-dehydroamino acid derivatives (DDAA) (8). Interaction of oxazolone derivatives (2a,b) with active methylene compounds as ethyl acetoacetate, malononitrile, ethylcyanoacetate, and cyanoacetamide afforded 9–16 respectively |
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