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- W2079554148 abstract "A new synthetic pathway to the parent and substituted ABCD ring cores of the camptothecin family of alkaloids was developed. The N-alkylation of 1,6-dihydro-6-oxo-2-pyridinecarbonitrile (2) with 3-bromo-1-phenylpropyne provided 3a using Curran's protocol. Treatment of 3a with a catalytic amount of DBU (5 mol %) at 110 °C for 12 h produced indolizino[1,2-b]quinolin-9(11H)-one (6a), the parent ABCD ring core of camptothecin, in essentially quantitative yield." @default.
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- W2079554148 date "2006-09-01" @default.
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- W2079554148 title "Synthesis of the Parent and Substituted Tetracyclic ABCD Ring Cores of Camptothecins via 1-(3-Aryl-2-propynyl)- 1,6-dihydro-6-oxo-2-pyridinecarbonitriles" @default.
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- W2079554148 doi "https://doi.org/10.1021/ol0620242" @default.
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