Acid-catalyzed cyclizations of n-vinyl-α-sulfinylacetamides A novel synthetic approach to erythrinane

Add time:07/17/2019    Source:sciencedirect.com

Under the Pummerer reaction conditions, N-(1-cyclohexenyl)-N-methyl-α-(methylsulfinyl)acetamide (7a) cyclized in a 5-endo trigonal fashion through the intermediary cation (8) to give the tetrahydro-4H-oxindole (10). The reaction was successively applied to a novel synthesis of erythrinane skeleton.

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