ABSTRACT
Spirocyclopropanes were prepared from aromatic aldehydes, 1,3-indandione and acetophenones through a halogenation/SN2-displacement/Michael-initiated ring-closing sequence by a pyridinium-ylide-assisted multicomponent reaction, and their further use was also researched in the construction of cyclopropa[c]indeno[1,2-b]quinolines through subsequent Staudinger/aza-Wittig reactions.
GRAPHICAL ABSTRACT
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Acknowledgment
We would like to appreciate Professor Shi-Jie Liu from the State University of New York for providing linguistic assistance during the preparation of this manuscript.