Three Different Dimerizations of 2-Bromo-3-methyl-1,4-naphthoquinones
- Shuhei Azuma ,
- Kazuyuki Nishio ,
- Konomi Kubo ,
- Takahiro Sasamori ,
- Norihiro Tokitoh ,
- Kouji Kuramochi , and
- Kazunori Tsubaki
Abstract

Three types of dimeric naphthoquinones, which possess structurally diverse skeletons, can be prepared in one step from 2-bromo-3-methyl-1,4-naphthoquinones. 2,2′-Dimeric naphthoquinones were prepared by a one-pot Stille-type reaction via vinylstannanes. Oxepines are formed by unexpected domino reactions via 1,4-dihydroxynaphthalene species. Epoxides are formed by a Michael/Darzens reaction via the o-quinone methides.
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