51839-15-7Relevant articles and documents
Diphosphametacyclophanes: Structural and electronic influences of substituent variation within a family of bis(diketophosphanyl) macrocycles
Pearce, Kyle G.,Crossley, Ian R.
, p. 14697 - 14707 (2020/11/20)
The condensation of MeP(SiMe3)2 with a series of 5-substituted isophthaloyl chlorides (5-R′C6H3-2,6-{C(O)Cl}2) affords the diphosphametacyclophanes m-{-C(O)-C6H3-5-R′-(C(O)PMe)}2 (R′ = I, Me, tBu, Ph, and p-NCC6H4); the analogues m-{-C(O)-C5H3N-(C(O)PMe)}2 and m-{-C(O)-C6H4-(C(O)PPh)}2 are similarly obtained in preference to higher oligomers, in contrast to precedent reports. The cyclophanes all adopt butterfly-like conformations in the solid state with the P-organyl substituents adopting mutually exo arrangements. Structural and computational data suggest the nature of the 5-R substituent is key in directing the inter-ring angle and the extent of LUMO stabilization about the diketophophanyl scaffold. The latter is substantiated by UV/vis spectroscopy and cyclic voltammetry, which demonstrate these cyclophanes to be appreciably comparable to the diketophosphanyl systems commonly explored in the context of organic electronic materials; intriguingly, the distinct dikeophosphanyl moieties within the macrocycles appear effectively “insulated” by the macrocycle geometry, rather than acting as a through-conjugate.
Synthesis of Indole-Fused Polycyclics via Rhodium-Catalyzed Undirected C-H Activation/Alkene Insertion
Guo, Songjin,Pan, Rui,Guan, Zhe,Li, Panpan,Cai, Libo,Chen, Siwei,Lin, Aijun,Yao, Hequan
supporting information, p. 6320 - 6324 (2019/08/26)
A Rh(III)-catalyzed undirected C-H activation/alkene insertion to synthesize diversified indole-fused polycyclics has been developed. Intramolecular electrophilic cyclization generated a 3-indolyl rhodium species that went through an aryl-to-aryl 1,4-rhodium migration to realize the C-H activation. The subsequent [4 + 2] carboannulation or hydroarylation of alkenes could be achieved, respectively, by simply adjusting the additives of the reaction.
TWELVE-ARMED HEXAPHENYLBENZENE-BASED GIANT SUPRAMOLECULAR SPONGE FOR MOLECULAR INCLUSION AND PROCESS FOR PREPARATION THEREOF
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Page/Page column 15, (2018/06/16)
The present invention discloses twelve-armed hexaphenyl benzene (HPB)-based giant supramolecular sponges of formula (I) for molecular inclusion and process for preparation thereof.
