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.

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.

Crystal structure of ethyl 4-[(1H-pyrazol-1-yl)meth­yl]benzoate

In the title mol­ecule, C₁₃H₁₄N₂O₂, the dihedral angle between the pyrazole and benzene ring mean planes is 76.06 (11)°, and the conformation of the ethyl side chain is anti [C—O—C—C = −175.4 (3)°]. In the crystal, the only directional inter­actions are very weak C—H ...π inter­actions involving both the pyrazole and benzene rings, leading to the formation of a three-dimensional network.