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Ethers, 2-methoxyethoxymethyl removal

A 2-methoxyethoxymethyl ether (MEMOR) is normally prepared under non-acidic conditions in methylene chloride solution or under basic conditions. The MEM ether group can be removed in excellent yield with trifluoroacetic acid (TEA) in dichloromethane (1 1). The MEM group can also be removed by treatment with zinc bromide (ZnBr2), titanium chloride (TiCU) or bromocatechol borane. When MEM-protected diols are treated with zinc bromide (ZnBr2) in ethyl acetate, 1,3-dioxane is formed and a mechanism of this reaction is given in Scheme 1.23. [Pg.31]

Titanium tetrachloride Protection of hydroxyl as y -methoxyethoxymethyl ethers Removal of the protective group... [Pg.15]

See other pages where Ethers, 2-methoxyethoxymethyl removal is mentioned: [Pg.248]    [Pg.274]    [Pg.143]    [Pg.242]    [Pg.1279]    [Pg.175]    [Pg.31]    [Pg.47]    [Pg.149]    [Pg.980]   
See also in sourсe #XX -- [ Pg.648 ]

See also in sourсe #XX -- [ Pg.6 , Pg.648 ]

See also in sourсe #XX -- [ Pg.648 ]



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