3677-81-4Relevant articles and documents
Four-coordinate triarylborane synthesis: Via cascade B-Cl/C-B cross-metathesis and C-H bond borylation
Yang, Kai,Zhang, Guan,Song, Qiuling
, p. 7666 - 7672 (2018/10/24)
To develop a simple and efficient synthetic method for four-coordinate triarylboranes, we herein describe a tandem highly selective B-Cl/C-B cross-metathesis of two of the same or different arylboranes and C-H bond borylation to synthesize four-coordinate triarylboranes with a broad substrate scope. By switching substituent groups of the target molecules, different emission wavelengths can be achieved from 467 nm to 583 nm with aggregation-induced emission (AIE) properties.
Pyrrolopyrrole cyanine dyes: A new class of near-Infrared dyes and fluorophores
Fischer, Georg M.,Isomaki-Krondahl, Magnus,Gottker-Schnetmann, Inigo,Daltrozzo, Ewald,Zumbusch, Andreas
supporting information; experimental part, p. 4857 - 4864 (2009/12/08)
Pyrrolopyrrole cyanine (PPCy) dyes are presented as a novel class of near-infrared (NIR) chromophores, which are synthesized in a condensation reaction of diketopyrrolopyr-role with heteroarylacetonitrile compounds. Their optical properties are marked by strong and narrow-band NIR absorptions. Complexation prod-ucts with BF2 and BPh2 show strong NIR fluorescence and hardly any ab-sorption in the visible range. We syn-thesized a series of new PPCys that differ only in the heterocyclic peripheral groups of the chromophore. With this strategy, the absorption spectra can be tuned between 684 and 864 nm, while high fluorescence quantum yields are maintained. The influence of the heterocycle on the optical properties of the dyes is discussed.
Bis(phosphino)borates: A new family of monoanionic chelating phosphine ligands
Thomas, J. Christopher,Peters, Jonas C.
, p. 5055 - 5073 (2008/10/08)
The reaction of dimethyldiaryltin reagents Me2SnR2 (R = Ph (1), p-MePh (2), m,m-Me2Ph (3), p-tBuPh (4), p-MeOPh (5), p-CF3Ph (6)) with BCl3 provided a high-yielding, simple preparative route to the corresponding diarylchloroboranes R2BCl (R = Ph (10), p-MePh (11), m,m-Me2Ph (12), p-tBuPh (13), p-MeOPh (14), p-CF3Ph (15)). In some cases, the desired diarylchloroborane was not formed from an appropriate tin reagent Me 2SnR2 (R = o-MeOPh (7), o,o-(MeO)2Ph (8), o-CF3Ph (9)). The reaction of lithiated methyldiaryl- or methyldialkylphosphines with diarylchloroboranes or dialkylchloroboranes is discussed. Specifically, several new monoanionic bis(phosphino)borates are detailed: [Ph2B(CH2PPh2)2] (25); [(p-MePh)2B(CH2PPh2)2] (26); [(p-tBuPh)2B(CH2PPh2)2] (27); [(p-MeOPh)2B-(CH2PPh2)2] (28) ; [(p-CF3Ph)2B(CH2PPh2) 2] (29); [Cy2B(CH2PPh2) 2] (30); [Ph2B(CH2P{p-tBuPh} 2)2] (31);[(p-MeOPh)2B-(CH2P{p- tBuPh}2)2] (32); [Ph2B(CH 2P{p-CF3Ph}2)2] (33); [Ph 2B(CH2P(BH3)(Me)2)2] (34); [Ph2B(CH2P(S)(Me)2)2] (35); [Ph2B(CH2P1Pr2)2] (36); [Ph2B(CH2PtBu2)2] (37); [(m,m-Me2Ph)2B(CH2PtBu 2)2] (38). The chelation of diarylphosphine derivatives 25-33 and 36 to platinum was examined by generation of a series of platinum dimethyl complexes. The electronic effects of substituted bis(phosphino)borates on the carbonyl stretching frequency of neutral platinum alkyl carbonyl complexes were studied by infrared spectroscopy. Substituents remote from the metal center (i.e. on boron) have minimal effect on the electronic nature of the metal center, whereas substitution close to the metal center (on phosphorus) has a greater effect on the electronic nature of the metal center.
