Add time:08/20/2019 Source:sciencedirect.com
A new one-step, pseudo four-component approach for the synthesis of fully substituted Pyridine (cas 110-86-1)s via ring-opening of the cyclic acyl amidine of 3-amino-1H-isoindol-1-one and its aza-analogues during the reaction with malononitrile in the presence of sodium methoxide, followed by pyridine ring closure is reported. This method allows the one-step preparation of previously unknown 2-(pyridin-4-yl)(hetero)aryl carboxamides in good yields under mild reaction conditions.
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