Aluminium alkoxide derivatives chloride

A veiy elegant reaction is the synthesis of 1-hydrosilatrane and its C-substituted derivatives via readily available boratranes. Aprotic conditions exclude side processes involving the Si—H bond, so that the desired silatranes are formed in high yields (60-95%) . For example, triethoxysilane reacts with 4-ethylboratrane in xylene in the presence of magnesium propoxide to give l-hydro-4-ethylsilatrane (92%) (equation 40) . Aluminium alkoxides or aluminum chloride are also used as catalysts. The reaction rate decreases sharply in the absence of catalysts. Attempts to prepare l-(2 -chloroethyl)silatrane by this mild method failed . 

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