Organic compounds -- part of the class 532-570 series – Organic compounds – Aluminum containing
Reexamination Certificate
2004-08-13
2008-11-11
Gonzalez, Porfirio Nazario (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Aluminum containing
C568S343000
Reexamination Certificate
active
07449592
ABSTRACT:
A process of preparing methylaluminium dichloride by(i) reacting by heating a material of the formula R3Al2X3, where R is C1-C4alkyl and X is selected from bromine and iodine with an aluminium-containing material selected from metallic aluminium and a mixture of metallic aluminium and aluminium trichloride in an atmosphere of methyl chloride, with the proviso that when R is methyl and X is iodine, the aluminium-containing material is a mixture of aluminium and aluminium trichloride; and(ii) when the aluminium-containing material is metallic aluminium, adding aluminium trichloride to this reaction mixture and heating,to give a crude reaction product; and(iii) if desired, obtaining methylaluminium dichloride from this crude reaction product.The crude reaction product may be used directly in organic syntheses, such as the cyclisation of ψ-Georgywood to give β-Georgywood.
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Barras Jean-Pierre
Schröder Fridtjof Wai
Givaudan SA
Gonzalez Porfirio Nazario
Norris McLaughlin & Marcus PA
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