121554-18-5Relevant articles and documents
Synthesis of cyclic compounds consisting of face-to-face p-oligophenyls
Morisaki, Yasuhiro,Tsuji, Yuichi,Chujo, Yoshiki
supporting information, p. 1631 - 1634 (2014/03/21)
Facile synthesis of xanthene-based π-stacked compounds consisting of face-to-face p-oligophenyls has been described. Just by mixing xanthene-4,5-diboronic acid and p-oligophenyls containing a benzenetetraol unit yielded cyclic compounds selectively due to the reversibility of the boronate esterification. In the ground state, weak π-π interactions between two p-oligophenyl moieties were observed, whereas their π-π interactions were clearly shown in the excited state.
Photochromic dichroic naphtho-pyrans and optical articles containing them
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Page/Page column 18, (2009/09/26)
A naphthopyran compound represented by the formulae (I) to (IV) wherein : ■ m1, m2, p, q are each an integer comprised from 0 to 4 or 5 inclusive; ■ R1, R2 and R4, represent a group selected from halogen, H, -Ra, aryl, -OH, -ORa, -SH, -SRa, -NH2, -NRaRa1, -NRbRc, -NRa1CORa, -NRa1CO(aryl), -NRa1aryl, -N-aryl2, -N(aryl)CO(aryl), -CO-Ra, -CO2Ra1, -OC(O)-Rd, and - X-(Re)-Y, and linear or branched (C1-C18) perfluoroalkyl group, wherein Ra, Ra1, Rb, Rc, X, Y, Re, Rd are as defined into the description; ■ Z1 represent a group selected from: wherein R3, J and n are as defined into the description; ■ R5, Z2, Z3 are as defined into the description; ■ Z4 represent a group selected from: o wherein R3, J and n are as defined hereinbefore; ■ with the provision that for compounds of formula (II) when Z1 represents a group then Z3 is not a hydrogen.