48 research outputs found
Thermally irreversible photochromic dithienylethenes
Get PDFAbstract. A lot of previously unknown derivatives of dithienylperfluorocyclopentene (DTPFCP) were synthesized. It was shown that 2, 2 -dialkylsubstituted DTPFCP'S are phtochromes. The quantum yields of forward and backward photochemical reactions and spectral parameters of open and cyclic forms of the photochromes synthesized were measured. An attempt to obtain fluorescing phtochromes by means of introduction of benzoxazolyl, benzthiazolyl and 1,2,4-oxadiazolyl moieties in 5 and 5 positions of DTPFCP failed; these compounds were synthesized but they do not fluoresce
Reactions of arylsulfonyl compounds with excess organolithium reagent 11. Polar addition to 3-lithioarynes and the synthesis of 2-substituted isophthalic acids
No full textReactions of arylsulfonyl compounds with an excess of an organolithium reagent 13. Synthesis of o-mercapto sulfones and o-bissulfones of the benzene, naphthalene, and thiophene series from o-lithio sulfones
No full textReaction of arylsulfonyl compounds with excess organolithium reagent Communication 7. Action of n-butyllithium on tert-butyl 2-naphthyl sulfone
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