Salbutamol → Methyl-5[[(1,1-dimethylethyl)(phenylmethyl)-amino]acetyl]-2-hydroxybenzoate

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Reaktionsschritte

Albuterol has been prepared, see Irish Patent Specification No. 31391, Aug. 9, 1972, starting from the appropriate acetophenone derivative methyl-5-(bromoacetyl-2-hydroxybenzoate, by condensation with N-(1,1-dimethylethyl)benzenemethanamine in the presence of base to form the ketonic ester, methyl-5[[(1,1-dimethylethyl)(phenylmethyl)-amino]acetyl]-2-hydroxybenzoate. The ketonic ester is reduced with lithium aluminum hydride in tetrahydrofuran under nitrogen to yield α1 -[[(1,1-dimethylethyl)-(phenylmethyl)amino]methyl]-4-hydroxy-1,3-benzenedimethanol which is subsequently debenzylated with hydrogen in the presence of palladium on carbon catalyst to produce albuterol.

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