α,α'-Dibrom-o-xylol Chemische Eigenschaften,Einsatz,Produktion Methoden
R-S?tze Betriebsanweisung:
R22:Gesundheitssch?dlich beim Verschlucken.
R34:Verursacht Ver?tzungen.
S-S?tze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn m?glich, dieses Etikett vorzeigen).
Chemische Eigenschaften
white to light yellow crystal powde
Verwenden
1,2-Bis(bromomethyl)benzene is used in the synthesis of isothioureas involved in the inhibition of human nitric oxide synthases. Also used in the synthesis of tridentate carbene ligands.
Application
1,2-Bis(bromomethyl)benzene (α,α′-Dibromo-o-xylene) is a source of o-quinodimethane, a highly reactive diene useful in Diels-Alder reactions; an electrophile for
the synthesis of carbo- and heterocyclic compounds including macrocycles (cyclophanes, crown ethers,
hemispherands, spherands), cryptands, hemicarcerands, vaulted cappedophanes, bicyclic compounds,
spirocyclic compounds; a protective group reagent for diols.
Lager
1,2-Bis(bromomethyl)benzene should be avoided moisture; corrosive (forms HBr on hydrolysis); lachrymator;
not mutagenic in Ames test; decontaminate by soaking apparatus, etc. in alcoholic alkali for 24 h or longer.
l?uterung methode
Crystallise it from CHCl3 or pet ether, and/or distil it under vacuum. [Wenner Org Chem 17 527 1952, Beilstein 5 H 366, 5 I 180, 5 II 285, 5 III 819, 5 IV 929.]
α,α'-Dibrom-o-xylol Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
2H-Isoindole
3',4'-dihydro-6-methylenespiro(2,4-cyclohexadiene-1,2'(1'H)-naphthalene)
1,2-BIS(DIPHENYLPHOSPHINOMETHYL)BENZENE
2-BENZYL-2,3-DIHYDRO-1H-ISOINDOLE
o-Phenylendiacetonitril
o-Xylol-α,α'-diol
o-Phenylendiessigsure
P,P'-[(1,2-Phenylene)bis(Methylene)]bisphosphonic Acid P,P,P',P'-tetraethyl ester
Carbamic acid, N-(1,3-dihydro-2H-isoindol-2-yl)-N-methyl-, 1,1-dimethylethyl ester