2997-53-7

Basic information

• Product Name: (4-Aminophenyl)diphenylmethanol
• Synonyms: (4-Aminophenyl)diphenylmethanol
• CAS NO: 2997-53-7
• Molecular Formula: C₁₉H₁₇NO
• Molecular Weight: 0
• Mol File: 2997-53-7.mol
• Article Data: 3

Chemical Properties

• Appearance: /
• Storage Temp.: 2-8°C
• CAS DataBase Reference: (4-Aminophenyl)diphenylmethanol(CAS DataBase Reference)
• NIST Chemistry Reference: (4-Aminophenyl)diphenylmethanol(2997-53-7)
• EPA Substance Registry System: (4-Aminophenyl)diphenylmethanol(2997-53-7)

Safety Data

• Hazardous Substances Data: 2997-53-7(Hazardous Substances Data)

Upstream product

• 119-61-9 benzophenone 
• 5089-33-8 2-(4-bromophenyl)-1,1,1,3,3,3-hexamethyldisilazane 
• 2945-12-2 1-(diphenylmethyl)-4-nitrobenzene 
• 4518-10-9 Methyl 3-aminobenzoate 
• 99-05-8 meta-aminobenzoic acid 
• 52189-36-3 methyl 5-acetylaminobenzoate 
• 71-43-2 benzene 
• 95946-75-1 N-(4-benzhydrylphenyl)acetamide 
• 41273-47-6 4-nitro-trityl chloride 
• 440333-21-1 4-[bis(trimethylsilyl)amino]phenyl diphenyl methanol 
• 58814-37-2 N-(4-(hydroxydiphenylmethyl)phenyl)acetamide 
• 110-86-1 pyridine 

Downstream Products

• 128527-00-4 N,N-dimethyl-N-{4-[(E)-(4-(diphenylhydroxymethyl)phenyl)diazenyl]phenyl}amine 
• 102882-84-8 (4'-Amino-biphenyl-4-yl)-diphenyl-methanol 
• 114279-23-1 (4'-Nitro-biphenyl-4-yl)-diphenyl-methanol 

Relevant articles and documents

Development of hydrophilic photolabile hydroxyl protecting groups

Hydrophilic photolabile protecting groups (PPGs) for hydroxyl protection have been developed. The new PPGs are derived from 3-(dimethylamino)trityl (DMATr) by replacing the two methyl groups with two hydrophilic butyryl groups. The new PPG reagents can be readily prepared and installed. They are stable in the dark but can be removed cleanly and efficiently in aqueous environments upon irradiation with a UV lamp or sunlight.

Phenylazo-Substituted Triphenylmethylium Systems

Triphenylmethanols (or their ethers) bearing phenylazo groups react with trifluoroacetic acid to give deeply colored solutions of the tritylium ions 7(+) - 9(+), (RC6H4N=NC6H4)nC(+)(C6H5)3-n (R = H, Me, Cl, NO2, MeO, H2N, Me2N), whose long wavelengths VIS absorptions and lowfield 1H-NMR signals are consistent with the existence of through-conjugated ?-electron systems.After addition of trifluoromethanesulfonic acid significant hypsochromic shifts of the VIS bands as well as additional proton deshieldings in the 1H-NMR spectrum are observed, which are in accordance with the formation of proximally azo-protonated phenylazotritylium ions 7(+)*H(+), 8(+)*2H(+), and 9(+)*3H(+), (RC6H4N=N(+)H-C6H4)nC(+)(C6H5)3-n.Fully analogous acid-strength-dependent ionisation/protonation reactions result for the overall p-substituted ions 17(+), 18(+), (RC6H4N=NC6H4)C(+)(C6H4R')2 (R,R' = Me, MeO, Me2N), as well as for the azobistritylium system 10(2+), (C6H5)2C(+)C6H4N=NC6H4C(+)(C6H5)2, and its azoxy derivative 11(2+).The linearly extended bis- and trisazo systems 19(+), 22(+), MeC6H4N=N(C6H4N=N)1,2C6H4C(+)(C6H5)2 and the (phenylazo)styryl system 20(+), MeC6H4N=NC6H4CH=CHC6H4C(+)(C6H5)2 in trifluoroacetic acid do not show any significant color changes relativ to the corresponding monofunctional parent types.In trifluoromethanesulfonic acid, however, compounds 19(+), 22(+) exhibit the usual bathochromic shifts of the longest wavelenght VIS absorption accompanying the increasing protonation of the polyazo system.In the case of the tritylium ions containing azomethine bridges, 24(+), only for the methoxy derivative 24b(+) indications for the existence of the conjugatively extended tritylium system (MeOC6H4N=CHC6H4)C(+)(C6H5)2 are found.The amide derivatives 26(+)-29(+), on the other hand, presents no clues for the existence of through-conjugated systems of the kind ArC(OH)=NC6H4C(+)Ar2 and ArN=C(OH)C6H4C(+)Ar2, respectively.