Fig. 1 | Nature Communications

Fig. 1

From: Diastereo- and enantioselective [3 + 3] cycloaddition of spirocyclopropyl oxindoles using both aldonitrones and ketonitrones

Fig. 1

Enantioselective cycloaddition reactions using D−A cyclopropanes. a Well-established cyclic compounds synthesis. b Undeveloped spiro stereocenter generation compounds synthesis. c Activation of spirocyclopropyl oxindoles for cycloaddition reactions. Donor (D): electron-releasing group; Acceptor (A): electron-withdrawing group (CO2R or COR)

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