Morita–Baylis–Hillman reaction of Indole-2-carboxaldehyde (cas 19005-93-7): new vistas for indole-annulated systems

Add time:07/20/2019    Source:sciencedirect.com

DABCO-mediated Morita–Baylis–Hillman reactions of several 1-substituted-indole-2-carboxaldehydes are disclosed. It was discovered that carboethoxy or tert-butoxycarbonyl groups installed at N-1 undergo cleavage under the reaction conditions to afford 2-substituted indoles. Utility of the N-substituted adducts for preparing a variety of annulated indoles has been exemplified.

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