title: (9S,13R,14R)-7,8-Didehydro-3,4,7-trimeth-oxy-17-methyl-morphinan-6-one.
abstract: The title compound, C(20)H(25)NO(4), was synthesized by a Mitsunobu reaction of sinomenine [(9S,13R,14R)-7,8-didehydro-4-hydroxy-3,7-dimethoxy-17-methylmorphinan-6-one] with methanol. The chiral centers were unchanged during the reaction. Intra-molecular C-H⋯O hydrogen bonds result in the formation of six-membered rings.
authors.affiliation: Department of Applied Chemistry, College of Science, Nanjing University of Technology, Nanjing 210009, People's Republic of China.
authors.forename: Yu-Feng
authors.initials: YF
authors.lastname: Li
authors.forename: Yi
authors.initials: Y
authors.lastname: Qian
authors.forename: Li-He
authors.initials: LH
authors.lastname: Yin
authors.forename: Ran
authors.initials: R
authors.lastname: Lv
authors.forename: Hong-Jun
authors.initials: HJ
authors.lastname: Zhu