tert-Butyl N-[2-(N-isobutyl-4-meth­oxy­benzene­sulfonamido)­eth­yl]carbamate

The title compound, C₁₈H₃₀N₂O₅S, was synthesized by the reaction of tert-butyl 2-(iso­butyl­amino)­ethyl­carbamate with p-meth­oxy­phenyl­sulfonyl chloride. In the mol­ecule, two intra­molecular C—H...O hydrogen bonds are observed. In the crystal, mol­ecules are linked by N—H...O hydrogen bonds involving the imino group N atom and the ester group O atom into chains running parallel to the b axis. The chains are further connected by C—H...O hydrogen bonds, forming layers parallel to the bc plane.

Methyl 5-methyl-1-(1H-pyrazol-3-yl)-1H-1,2,3-triazole-4-carboxyl­ate

The asymmetric unit of the title compound, C₈H₉N₅O₂, contains two independent mol­ecules (A and B) in which the dihedral angles between the triazole and pyrazole rings are 4.80 (14) and 8.45 (16)°. In the crystal, mol­ecules are linked by N—H...N hydrogen bonds into supra­molecular independent A and B chains propagating along the b-axis direction. The crystal structure also features π–π stacking between the aromatic rings of adjacent chains, the centroid–centroid separations being 3.8001 (15), 3.8078 (17), 3.8190 (14) and 3.8421 (15) Å.

Di-tert-butyl 1-[2-hy­droxy-3-(methyl­sulfan­yl)prop­yl]hydrazine-1,2-di­carboxyl­ate

The title compound, C₁₄H₂₈N₂O₅S, was synthesized by the reaction of 2-[(methyl­sulfan­yl)meth­yl]oxirane with di-tert-butyl oxalate in hydrazine hydrate. In the crystal, mol­ecules are linked by N—H...O and O—H...O hydrogen bonds into supra­molecular chains propagating along the b-axis direction.