title: (S)-1,5-Dibenzyl-3-tert-butyl-imidazol-idin-4-one.
abstract: The title compound, C(21)H(26)N(2)O, was obtained as an unexpected by-product when attempting to prepare (S)-2-benzyl-N-tert-butyl-1,2,3,4-tetra-hydro-isoquinoline-3-carboxamide from (S)-2-benzyl-amino-N-tert-butyl-3-phenyl-propanamide and dimethoxy-methane. The mol-ecules are linked by weak C-H⋯O hydrogen bonds, generating linear chains parallel to the b axis. C-H⋯π inter-actions provide further stability for the crystal structure. The planes of the two phenyl rings make a dihedral angle of 84.1 (1)°. The absolute configuration was known from the starting material.
authors.affiliation: Department of Chemistry, Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China.
authors.forename: Jian-Feng
authors.initials: JF
authors.lastname: Zheng
authors.forename: Jian-Nan
authors.initials: JN
authors.lastname: Guo
authors.forename: Su-Yu
authors.initials: SY
authors.lastname: Huang
authors.forename: Bo
authors.initials: B
authors.lastname: Teng
authors.forename: Li-Ren
authors.initials: LR
authors.lastname: Jin