NAPHTHOPYRANS AND COMPOSITIONS AND ARTICLES CONTAINING THEREOF Russian patent published in 2001 - IPC

FIELD: organic chemistry. SUBSTANCE: invention describes novel naphthopyrans of the general formula (I) where R¹, R², R⁴ and R⁶ can be similar or different and each means independently hydrogen atom, linear or branched alkyl group with 1-12 carbon atoms; R⁷ and R⁸ can be similar or different and each means independently linear or branched alkyl group with 1-12 carbon atoms, cycloalkyl group with 3-12 carbon atoms, aryl group with 6-24 carbon atoms or heteroaryl group with 4-24 carbon atoms and at least one heteroatom as sulfur, oxygen or nitrogen atom; this aryl or heteroaryl group can be substituted with one or more substitutes taken among linear or branched alkyl group with 1-6 carbon atoms, linear or branched alkoxy-group with 1-6 carbon atoms and group NR'R'' where R' and R'' can be similar or different and each means independently linear or branched alkyl group with 1-6 carbon atoms or taken in common with nitrogen atom to which they are bound form 5-7 membered ring; the latter can include at least a single another heteroatom as oxygen atom or the group julolidine-9-yl; or groups R⁷ and R⁸ taken in common form adamantyl, norbornyl or fluorenylidene group; R³ and R⁵ can be similar or different and each means independently linear or branched alkoxy-group with 1-6 carbon atoms. New compounds show photochromic properties. Invention describes also photochromic compositions based on thereof and ophthalmological articles (for example, lens) that include naphthopyrans. EFFECT: valuable properties of new compounds. 10 cl, 1 dwg, 1 tbl, 10 ex