title: Crystal structure of (±)-(5SR,6SR)-6-ethenyl-1-[(RS)-1-phenyl-eth-oxy]-1-aza-spiro-[4.5]decan-2-one.
abstract: In the title compound, C19H25NO2, the pyrrolidine ring adopts an envelope form, with the spiro C atom as the flap, while the cyclo-hexane ring shows a chair form. A weak intra-molecular C-H⋯O inter-action supports the mol-ecular conformation, generating an S(6) ring motif. In the crystal, pairs of C-H⋯O inter-actions connect the mol-ecules into inversion dimers with an R 2 (2)(16) ring motif. The dimers are linked by a second pair of C-H⋯O inter-actions, enclosing an R 4 (2)(12) ring motif, into a tape structure along the b axis.
authors: School of Medicine, Keio University, Hiyoshi 4-1-1, Kohoku-ku, Yokohama 223-8521, Japan.
authors: Takeshi
authors: T
authors: Oishi
authors: Department of Applied Chemistry, Faculty of Science and Technology, Keio University, Hiyoshi 3-14-1, Kohoku-ku, Yokohama 223-8522, Japan.
authors: Shio
authors: S
authors: Yamamoto
authors: Department of Applied Chemistry, Faculty of Science and Technology, Keio University, Hiyoshi 3-14-1, Kohoku-ku, Yokohama 223-8522, Japan.
authors: Takashi
authors: T
authors: Yokoyama
authors: Department of Applied Chemistry, Faculty of Science and Technology, Keio University, Hiyoshi 3-14-1, Kohoku-ku, Yokohama 223-8522, Japan.
authors: Akihiro
authors: A
authors: Kobayashi
authors: Department of Applied Chemistry, Faculty of Science and Technology, Keio University, Hiyoshi 3-14-1, Kohoku-ku, Yokohama 223-8522, Japan.
authors: Takaaki
authors: T
authors: Sato
authors: Department of Applied Chemistry, Faculty of Science and Technology, Keio University, Hiyoshi 3-14-1, Kohoku-ku, Yokohama 223-8522, Japan.
authors: Noritaka
authors: N
authors: Chida
keywords: N-alk­oxy-N-alkyl­amide; crystal structure; cyclo­hexa­ne; hydrogen bonding; pyrrolidine