Detail of "5720-05-8"

CAS Number:
5720-05-8
Name:
Boronic acid,B-(4-methylphenyl)-
Superlist Name:
4-Tolylboronic acid
Molecular Structure:
Formula:
C₇H₉BO₂
Molecular Weight:
135.96
Synonyms:
Boronicacid, (4-methylphenyl)- (9CI);p-Tolueneboronic acid (7CI,8CI);(4-Methylphenyl)boronic acid;(p-Methylphenyl)boronic acid;4-Tolueneboronic acid;NSC62870;p-Methylbenzeneboronic acid;p-Tolylboronic acid;
Density:
1.1 g/cm³
Melting Point:
256-263 °C(lit.)
Boiling Point:
275.2 °C at 760 mmHg
Flash Point:
120.2 °C
Appearance:
white to light yellow crystal powder
Hazard Symbols:
Xi
Risk Codes:
36/37/38
Safety:
26-36/37/39 Details

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CAS No.5720-05-8 4-Tolylboronic acid

Assay:HPLC≥98% Appearance:light yellow... Package:20kg/drum or...

Chemical Name: 4-Methylphenylboronic acid Application: liquid crystal intermediate/pharmace

Supplier:Hebei Maison Chemical Co.,Ltd[ China (Mainland)]

Verified-Silver Supplier 1st Year Silver
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1940

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Reference

Boronic acids as fructose sensors: Boronic acids as fructose sensors. Structure determination of the complexes involved using 1JCC coupling constants. Norrild, Jens Chr.; Eggert, Hanne (Dep. Org. Chem., Tech. Univ.Chemicals with cas numbers 5720-05-8 and 10043-35-3 also play role. Denmark, Lyngby DK-2800, Den.). Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry, (12), 2583-2588 (English) 1996 Royal Society of Chemistry. CODEN: JCPKBH. ISSN: 0300-9580. DOCUMENT TYPE: Journal CA Section: 33 (Carbohydrates) Section cross-reference(s): 22 Complex formation between p-tolyl boronic acid and D-fructose was investigated by 13C NMR spectroscopy both in neutral nonaq. and alk. aq. solns. to evaluate the possibilities of boronic acid based fructose sensors. Under both conditions a mixt. of complexes was obsd. The structures of the complexes in soln. were assigned on the basis of 1JCC coupling consts. which provided the information of the binding sites for the formed cyclic boronic esters. In alk. aq. soln. seven different complexes were obsd. At a 1:1 boronic acid: fructose ratio the major complex (82%) was b-D-fructofuranose 2,3,6-tri-O-(p-tolylorthoboronate). Under nonaq. conditions signals arising from 13 different compds. were obsd. Five of these complexes were structurally assigned. It is concluded that results of earlier studies on binding consts. bear no relation to the actual formed complexes. .

Regioselectivity in alkenyl(aryl)-heteroaryl Suzuki cross-coupling reactions of 2,4-dibromopyridine: All Rights Reserved. Regioselectivity in alkenyl(aryl)-heteroaryl Suzuki cross-coupling reactions of 2,4-dibromopyridine. A synthetic and mechanistic study. Sicre, Cristina; Alonso-Gomez, J.-Lorenzo; Cid, M. Magdalena ( Departamento de Quimica Organica, Facultade de Quimica, Universidade de Vigo, Vigo 36310, Spain). Tetrahedron, 62(48), 11063-11072 (English) 2006 Elsevier Ltd.In this article, certain chemicals are used. Some of their cas registry numbers are 5720-05-8 and 208929-34-4 CODEN: TETRAB. ISSN: 0040-4020. DOCUMENT TYPE: Journal CA Section: 27 (Heterocyclic Compounds (One Hetero Atom)) Section cross-reference(s): 29 2,4-Dibromopyridine undergoes a regioselective Suzuki cross-coupling reaction at position 2 with several alkenyl- or arylboronic acids to render 4-bromo-2-substituted pyridines, difficult to be prepd. otherwise, in good yields under palladium catalysis, either Pd(PPh3)4/TlOH or Pd2dba3/PCy3/K3PO4 at 25 °C. This behavior is explained on the basis of the electrophilic character of both C-Br bonds, with their relative reactivity in 2,4-dibromopyridine being similar to that in the corresponding monobromopyridines. In addn., the dicoupled 2,4-diaryl- or 2,4-dialkenylpyridines are not formed through a double oxidative addn. of 2,4-dibromopyridine to Pd(PPh3). .

Detail of "5720-05-8"

Boronic acid,B-(4-methylphenyl)-

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Reference