61188-00-9Relevant articles and documents
Total Synthesis of (+)-Antrocin and Its Diastereomer and Clarification of the Absolute Stereochemistry of (-)-Antrocin
Huang, Sheng-Han,Liang, Kai-Hsiang,Lu, Jia-Syun,Chang, Wei-Sheng,Su, Ming-Der,Yang, Te-Fang
, p. 9576 - 9584 (2017)
Using 2,2-dimethyl cyclohexanone as the starting compound, (+)-antrocin and its diastereomer have been synthesized. The absolute stereochemistry of (-)-antrocin, a natural sesqui-terpenoid and an antagonist in some types of cancer cells, was clarified using the character data of (+)-antrocin. The synthetic procedure involved two key steps: (1) the reaction of vinyl magnesium bromide with 2,2-dimethyl-6-t-butyl-dimethyl-silyoxy-methyl-1-cyclo-hexanone to give a vinyl cyclohexanol derivative and (2) a highly stereoselective intramolecular Diels-Alder (IMDA) reaction of the camphanate-containing triene intermediate. The relative energy levels of the possible transition states of the IMDA reaction of the camphanate-containing triene were obtained from density functional theory calculations, proving the stereospecific formation of the target molecule.
Stereospecific Construction of Contiguous Quaternary All-Carbon Centers by Oxidative Ring Contraction
Yu, Xin,Hu, Jiadong,Shen, Zhigao,Zhang, Hui,Gao, Jin-Ming,Xie, Weiqing
supporting information, p. 350 - 353 (2016/12/30)
Oxidative ring contraction of cyclic α-formyl ketones was facilitated by the action of H2O2under operationally simple and environmentally benign reaction conditions. The process was highly regioselective and enables stereospecific construction of contiguous quaternary all-carbon centers from stereodefined all-substituted all-cyclic ketones. The asymmetric syntheses of (+)-cuparene and (+)-tochuinyl acetate were also successively achieved by taking advantage of this novel protocol.
First total synthesis and assignment of the stereochemistry of crispatenine
Bourdron, Julien,Commeiras, Laurent,Audran, Gerard,Vanthuyne, Nicolas,Hubaud,Parrain, Jean-Luc
, p. 3770 - 3775 (2008/02/04)
(Figure Presented) The first racemic and enantioselective synthesis of crispatenine 1 has been achieved, which involved a few steps, enabling the assignment of the absolute and relative configurations.
New Synthesis of γ-Homocyclogeranial, γ-Dihydroionone and Their Derivatives
Kawanobe, Tsuneo,Kogami, Kunio,Hayashi, Kazuo,Matsui, Masanao
, p. 461 - 464 (2007/10/02)
A new and efficient synthesis of γ-homocyclogeranial (4), γ-dihydroionone (3) and their derivatives, 5, 6, 7 and 8, volatile components of ambergris, is described.Their compounds were synthesized via Claisen rearrangement of (3,3-dimethylcyclohexenyl)methyl vinyl ether (14).