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Diamines cyclic, intramolecular hydrogen

Dihydrobenzodiazepine derivatives, which are generated from phenylene-diamine and substituted acetophenone, are racemized by the intramolecular retro-Mannich/Mannich process. Combination of this racemization with chiral phosphoric acid-catalysed transfer hydrogenation by Hantzsch ester gave cyclic 1,3-diamine having a quaternary stereogenic centre (Scheme 5.41) [114]. [Pg.193]

See other pages where Diamines cyclic, intramolecular hydrogen is mentioned: [Pg.328]    [Pg.328]    [Pg.300]    [Pg.275]    [Pg.323]    [Pg.275]    [Pg.323]    [Pg.422]    [Pg.140]    [Pg.333]    [Pg.279]   


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Cyclic hydrogen

Cyclic hydrogenation

Diamines hydrogenation

Intramolecular 1,3-diamines

Intramolecular hydrogen

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