Abstract
The crystal structures of two newβ-adrenergic antagonists, derivatives of propranolol, are shown in this paper. The space groups and unit-cell parameters are: compound1 (C19H26NO4Cl): triclinic, space groupP1,a=6.420(1),b=10.161(1),c=15.823(1) A,α=82.47(1),β=84.16(1), γ=77.55(1)°; compound 2 (C20H28NO4Cl): monoclinic, space groupP21/c,a=6.460(1),b=33.285(2),c=10.120(1) A,β=104.83(1)°. The structures were solved by direct methods and refined with full-matrix least-squares techniques toR indices of 0.055 and 0.048, respectively. The −CH(OH)-CH2-NH-sections of the side chains show the conformation approximate togauche.
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