Abstract
N-alkylation of amines with alcohols through a borrowing hydrogen strategy is a green route to amines. heterogeneous bimetallic pt-sn/gamma-al2o3 catalyzed the reactions of primary (secondary) amines with alcohols in the absence of external hydrogen source, efficiently affording secondary (tertiary) amines with water and a small amount of imines as the by-products. various functional groups in the substrates were tolerated in the catalytic system. the pt-sn/gamma-al2o3 catalyst was easily recycled, suggesting its potential application in the production of secondary and tertiary amines.
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