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Tartaric acid-1,2-diaminocyclohexane

Unequivocal syntheses of cis- and mns-(i -decahydroquinoxalincs have been achieved by lithium aluminum hydride reduction of the corresponding cis- and trans-decahydroquinoxaIin-2-ones. The latter compounds were prepared by condensation of chloroacetic acid and cis- and trans-1,2-diaminocyclohexane, respectively. The resolution of frans-dUdecahydroquinoxaline was effected by use of first dibenzoyl-cZ-tartaric acid and then of dibenzoyl- -tartaric acid. "" (C/. p. 215.)... [Pg.244]

Preparative Methods cheap and readily available racemic trans-1,2-diaminocyclohexane can be resolved with d-(—)-tartaric acid, giving (15, 25 )-diaminocyclohexane with >98% enantiomeric excess. Detailed procedures for the resolution have been published. Determination of enantiomeric excess is made by HPLC analysis of the A(Af -bis(m-toluyl) derivative on a Pirkle L-Leucine-DNB column. Direct separation of enantiomers by preparative HPLC on a chiral colunrn has also been described. ... [Pg.202]

See other pages where Tartaric acid-1,2-diaminocyclohexane is mentioned: [Pg.2]    [Pg.186]    [Pg.2]    [Pg.119]    [Pg.287]    [Pg.139]    [Pg.97]   


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