(2R,3S)-Methyl 2-hydroxy-3-(4-methylbenzenesulfonamido)-3-phenylpropanoate

Crystal structures of (RS)-N-[(1R,2S)-2-benzyloxy-1-(2,6-dimethylphenyl)propyl]-2-methylpropane-2-sulfinamide and (RS)-N-[(1S,2R)-2-benzyloxy-1-(2,4,6-trimethylphenyl)propyl]-2-methylpropane-2-sulfinamide: two related protected 1,2-amino alcohols

The title compounds, C22H31NO2S, (1), and C23H33NO2S, (2), are related protected 1,2-amino alcohols. They differ in the substituents on the benzene ring,viz.2,6-dimethylphenyl in (1) and 2,4,6-trimethylphenyl in (2). The plane of the phenyl ring is inclined to that of the benzene ring by 28.52 (7)° in (1) and by 44.65 (19)° in (2). In the crystal of (1), N—H...O=S and C—H...O=S hydrogen bonds link molecules, forming chains along [100], while in (2), similar hydrogen bonds link molecules into chains along [010]. The absolute structures of both compounds were determined by resonance scattering.

tert-Butyl 2-hy-droxy-3-(4-methyl-benzene-sulfonamido)-butano-ate

In the crystal of the title compound, C(15)H(23)NO(5)S, mol-ecules are linked through N-H⋯O and O-H⋯O hydrogen-bond inter-actions, resulting in centrosymmetric dimers in which the N-H⋯O inter-actions generate R(2) (2)(12) rings and the O-H⋯O inter-actions generate R(2) (2)(14) rings. Weak inter-molecular C-H⋯O inter-actions are also observed.