M. Kinugawa et al., FACILE SYNTHESIS OF THE KEY INTERMEDIATE OF EO-9 VIA THE FORMATION OFTHE INDOLE SKELETON USING THE NENITZESCU REACTION, Journal of the Chemical Society. Perkin transactions. I, (21), 1995, pp. 2677-2678
A Nenitzescu reaction has been used to prepare the indole skeleton 6 h
aving all the functional groups necessary for its conversion into 10a,
a key intermediate in a short synthesis of the indolequinone EO 9.