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. 2021 Dec 1;122(1):565–788. doi: 10.1021/acs.chemrev.1c00449

Scheme 203. V-Shaped Dioxaphenalene Dyes.

Scheme 203

Reagents and conditions: (a)386,387 (1) H2SO4, (2) K2CO3; (b) Ac2O, DMAP.