PHOTOCHROMIC 5'-VINYL-6-NITRO-SPIROBENZOPYRAN DERIVATIVES AND PRODUCTION METHOD THEREOF Russian patent published in 2012 - IPC C07D491/107 G03C7/32 

FIELD: chemistry.

SUBSTANCE: present invention relates to novel derivatives of 5'-vinyl-6-nitro-spirobenzopyran of formula 1 , where R₁=R₂=H (SP2); R₁=CN, R₂=H (SP3); R₁=CHO, R₂=H(SP4); R₁=NC₂, R₂=H(SP5); R₁=CN, R₂=CN(SP6); R₁=CO₂CH₃, R₂-CN(SP7); R₁,R₂=-C(O)-O-C(CH₃)₂-O-(O)C-(SP8), which have photochromic properties, as well as production methods thereof. Disclosed are methods for directed modification on the 5'-position of a photochrome molecule using well-known and simple experimental procedures of organic synthesis (Wittig and Horner-Emmons olefination, nucleophilic bonding on the carbonyl group of reactants containing active methyl or methylene groups: nitromethane, malonodinitrile, cyanoacetic acid and esters thereof, Meldrum acid).

EFFECT: method of producing substituted 5'-vinyl-indoline spirobenzopyrans is characterised by that the starting 5'-formyl derivative in the solution undergoes olefination with different CH-acids in the presence of corresponding bases in an argon atmosphere at high temperature of the reaction mixture.

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