Abstract

α,ω-dianthryl poly(N-tert-butyliminoethylene) was prepared by end capping bifunctionally living PTBIE with 9-aminomethylanthracene and was used as a photosensitizer for the photochemical conversion of tachysterol compounds into previtamin D 2 and D 3 . The photosensitizer can be removed from the solution by extraction with aqueous HCl or by precipitation with a polyacid.

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