PALLADIUM-CATALYZED AMINATION OF PHOTOCHROMIC TRIFLATE- SUBSTITUTED 3H-NAPHTHO[2,1-b]PYRANS
Résumé
The conversion of triflic 3H-naphtho[2,1-fc>]pyrans to the corresponding piperazine derivatives, using the combination of palladium acetate/BINAP as catalyst is reported. Compared to the 3,3-diphenyl-3H-naphtho[2,1-b]pyran, the amino group on the 8-position of naphthopyran part induces a significant bathochromic shift of the absorption of the coloured form. Introduction :
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[Heterocyclic Communications] PALLADIUM-CATALYZED AMINATION OF PHOTOCHROMIC TRIFLATE-SUBSTITUTED 3H-NAPHTH0[12-b]PYRANS.pdf (548.55 Ko)
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