FIELD: process of polymerization. SUBSTANCE: compound having formula I 
interacts with compound having formula II 
(where X1 and X2 are preferable halogens) to prepare suitable indanones. Then by reduction and by dehydration said indanones are converted into desired compounds having formula IV 
and IVa 
where R1-R5 are preferably hydrogen or alkyl. EFFECT: improved efficiency of the method. 5 cl
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