Four-Component Assembly of Natural-Product-Like Ring-Fused Isoquinuclidines

• A four-component reaction between formyl-substituted 2-pyridones, aldehydes, amines, and activated alkenes has been developed. The resulting products are ring-fused natural-product-like isoquinuclidines. Three carbon–carbon bonds, two carbon–nitrogen bonds, and four or five stereocentres are formed in the reaction with overall product yields in the range 23–67 %. In most cases a single diastereomer was obtained. An intramolecular version of the reaction yielded analogues of the multi-ring-fused natural product catharanthine in a single step.

Ämnesord

NATURVETENSKAP  -- Kemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences (hsv//eng)

Nyckelord

multicomponent reactions

natural products

fused-ring systems

nitrogen­ heterocycles

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