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    • 8. 发明申请
    • PROCESS FOR THE PREPARATION OF METHYLALUMINIUM DICHLORIDE
    • 二氯化甲基铝的制备方法
    • WO2005016938A1
    • 2005-02-24
    • PCT/CH2004/000505
    • 2004-08-13
    • GIVAUDAN SABARRAS, Jean-PierreSCHRÖDER, Fridtjof
    • BARRAS, Jean-PierreSCHRÖDER, Fridtjof
    • C07F5/06
    • C07F5/064
    • A process of preparing methylaluminium dichloride by (i) reacting by heating a material of the formula R 3 Al 2 X 3 , where R is C 1 -C 4 alkyl 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 ß-Georgywood.
    • (i)通过加热式R3Al2X3的材料(其中R是C1-C4烷基,X选自溴和碘)与选自金属铝和金属的混合物的铝的材料反应制备甲基二氯化铝的方法 铝和三氯化铝在甲基氯气氛中,条件是当R为甲基且X为碘时,含铝材料为铝和三氯化铝的混合物; 和(ii)当含铝材料是金属铝时,向该反应混合物中加入三氯化铝并加热,得到粗反应产物; 和(iii)如果需要,从该粗反应产物中获得二氯化甲基铝。 粗反应产物可以直接用于有机合成中,例如将psi-Georgywood环化得到ß-Georgywood。