Stereoisomeric diaryl-β-γ-diamino-N-butanes
Abstract
When condensed with primary aromatic amines, β : γ-dibromohutane or the corresponding clichloride gives rise to secondary diamines of the following type:— ArNH. CH(CH3). CH(CH3). NHAr. These bases contain two asymmetric carbon atoms, which are either mirror images of each other or absolutely identical. Like the tartaric acids they should therefore exist in an internally-compensated meso-form, as well as an externally compensated mixture, potentially resolvable into optically active modifications. Moreover, the externally compensated mixture may belong to one of three categories, being either (1) a true racemoid, inseparable by purely physical agencies; (2) a conglomerate of d- and l-crystals, mechanically separable in various ways; or (3) a pseudo-racemoid, i. e., a special kind of mixed crystal containing d- and l-material in variable proportions.
