130525-43-8

Basic information

• Product Name: 4,5-DIBROMO-2,7-DI-TERT-BUTYL-9,9-DIMETHYLXANTHENE
• Synonyms: 4,5-DIBROMO-2,7-DI-TERT-BUTYL-9,9-DIMETHYLXANTHENE;4,5-dibromo-2,7-di-tert-butyl-9,9-dimethylxanthen;4,5-dibromo-2,7-di-tert-butyl-9,9-dimethyl-9H-xanthene
• CAS NO: 130525-43-8
• Molecular Formula: C₂₃H₂₈Br₂O
• Molecular Weight: 480.28
• Product Categories: Heterocyclic Compounds;O-ContainingHeterocyclic Building Blocks;Halogenated Heterocycles;Heterocyclic Building Blocks;Others
• Mol File: 130525-43-8.mol
• Article Data: 8

Chemical Properties

• Melting Point: 260-262 °C(lit.)
• Boiling Point: 429.7°C at 760 mmHg
• Flash Point: 178°C
• Appearance: /
• Density: 1.329g/cm³
• Vapor Pressure: 3.46E-07mmHg at 25°C
• Refractive Index: 1.56
• CAS DataBase Reference: 4,5-DIBROMO-2,7-DI-TERT-BUTYL-9,9-DIMETHYLXANTHENE(CAS DataBase Reference)
• NIST Chemistry Reference: 4,5-DIBROMO-2,7-DI-TERT-BUTYL-9,9-DIMETHYLXANTHENE(130525-43-8)
• EPA Substance Registry System: 4,5-DIBROMO-2,7-DI-TERT-BUTYL-9,9-DIMETHYLXANTHENE(130525-43-8)

Safety Data

• WGK Germany: 3
• Hazardous Substances Data: 130525-43-8(Hazardous Substances Data)

Usage

Uses

4,5-Dibromo-2,7-di-tert-butyl-9,9-dimethylxanthene may be used in the synthesis of:2,7-di-tert-butyl-4,5-diiodo-9,9-dimethylxanthenenew NON-donor ligand, 4,5-bis(2,6-diisopropylanilino)-2,7-di-tert-butyl-9,9-dimethylxanthenebis(diethylamino)xantphos, via one-pot metalation reaction and and quenching with bis(diethylamino)chlorophosphine

General Description

4,5-Dibromo-2,7-di-tert-butyl-9,9-dimethylxanthene is a heterocyclic building block.

InChI:InChI=1/C23H28Br2O/c1-21(2,3)13-9-15-19(17(24)11-13)26-20-16(23(15,7)8)10-14(12-18(20)25)22(4,5)6/h9-12H,1-8H3

Upstream product

• 90-47-1 xanth-9-one 
• 19814-75-6 9,9-dimethylxanthene 
• 130525-41-6 2,7-bis(1,1-dimethylethyl)-9,9-dimethylxanthene 
• 352336-84-6 4-bromo-2,7-di-tert-butyl-9,9-dimethyl-9H-xanthene 

Downstream Products

• 1260854-56-5 10-(4-(5-methoxycarbonyl-2,7-di-tert-butyl-9,9-dimethylxanthene))-5,15-bis(pentafluorophenyl)cobalt(III)corrole 
• 1260854-59-8 10-(5-hydroxycarbonyl-2,7-di-tert-butyl-9,9-dimethylxanthen-4-yl)-5,15-bis(pentafluorophenyl)cobaltcorrole 
• 1260854-67-8 10-(4-(5-hydroxycarbonyl-2,7-di-tert-butyl-9,9-dimethylxanthene))-5,15-bis(4-tert-butylphenyl)cobaltcorrole 
• 1260854-72-5 10-(4-(5-hydroxycarbonyl-2,7-di-tert-butyl-9,9-dimethylxanthene))-5,15-bis(2,4,6-trimethylphenyl)cobaltcorrole 
• 221462-97-1 1,1'-[2,7-bis(1,1-dimethylethyl)-9,9-dimethyl-9H-xanthene-4,5-diyl]bis[1,1-diphenylphosphine] 
• 130525-39-2 2,7-di-t-butyl-9,9-dimethyl-4,5-xanthenedicarboxylic acid 
• 201226-87-1 2,7-Di-tert-butyl-9,9-dimethyl-4-((R)-methyl-phenyl-phosphinoyl)-5-((S)-methyl-phenyl-phosphinoyl)-9H-xanthene 

Relevant articles and documents

Structurally strained cyclic xanthene dimers: A model for the rigid crown ether moiety in the reduced graphene oxide framework

Highly strained cyclic xanthene dimers, which serve as models for reduced graphene oxide (RGO), were synthesized by Ni(0) mediated homo-coupling reactions. The dimers are obtained as highly stable colorless solids. X-ray crystallographic analysis of a tetra-tert-butyl derivative demonstrates that it possesses a highly strained structure with an extremely short non-bonded O￡O distance (2.5662(44) ?). The results of variable temperature NMR experiments show that no signal broadening occurs even at 398 K, indicating that conformational flipping requires considerably high energy.

TADF COMPOUND and OLED Having the Same

The present invention relates to a novel thermally activated delayed fluorescence (TADF) compound capable of controlling a through space charge transfer (TSCT), and an organic light emitting device (OLED) comprising the same and, more specifically, to: a novel TADF compound including a back bone capable of controlling a TSCT and enabling a color tuning selectively by adjusting a distance and a type between a donor and an acceptor and controlling a bandgap; and an organic light emitting device including the TADF compound.(AA) Recombination(BB) Inverse inter-system transition(CC) Inter-system transition(DD) Fluorescence(EE) Thermally activation-delayed fluorescenceCOPYRIGHT KIPO 2020

Enhancements in catalytic reactivity and selectivity of homobimetallic complexes containing heteroditopic ligands

Rh(i) and Ir(i) homobimetallic complexes were synthesised using a heteroditopic ligand system on a xanthene scaffold containing a monodentate N-heterocyclic carbene ligand and a bidentate bis(pyrazol-1-yl)methane ligand. The complexes were tested as catalysts for the two-step dihydroalkoxylation and two-step hydroamination/hydrosilylation reactions. This is the first known report of an organometallic group 9 complex, Ir(i) bimetallic complex, 13, to selectively favour the opposite spirocyclisation product from that reported in the literature, 14cvs.14b. The Ir(i) homobimetallic complex catalyses the intramolecular hydroamination reaction of alkynamines efficiently and proved to be a highly active catalyst for promoting the subsequent hydrosilylation of the pyrrolines; completing the hydrosilylation reactions in less than 40 seconds. A chloro-bridged bimetallic species was observed in the solid state, revealing that the COD co-ligands present underwent an oxidation.