title: (R)-(+)-3-Hydr-oxy-2-methoxy-carbonyl-8-methyl-8-azoniabicyclo-[3.2.1]octane l-bitartrate.
abstract: (RS)-(±)-2-Methoxy-carbonyl-3-tropinone is an important inter-mediate for the preparation of cocaine and its derivatives. The molecule in the title compound, C(10)H(16)NO(3) (+)·C(4)H(5)O(6) (-), is present as the enol tautomer. The six-membered ring adopts a half boat conformation, and the five-membered ring a slightly distorted envelope conformation. There are intra- and inter-molecular hydrogen bonds involving the hydroxyl, carboxyl groups and quaternary ammonium groups.
authors.forename: Jian-Bing
authors.initials: JB
authors.lastname: Yu
authors.forename: Shuang-Wei
authors.initials: SW
authors.lastname: Chen
authors.forename: Guo-Rong
authors.initials: GR
authors.lastname: Zheng
authors.forename: Li-Yan
authors.initials: LY
authors.lastname: Dai