Identification and Mechanistic Studies of a Cell Cycle Regulator JP18 from a Library of Synthetic Indole Terpenoid Mimics
作者:Jinpeng Pei、Shupeng Zhou、Fan Yang、Yu Sun、Ang Li、Wei-Dong Zhang、Weiwei He
DOI:10.1002/asia.201600714
日期:2016.10.6
We constructed a small library of indoleterpenoidmimics using a hybridizing strategy to link various indole and α,β‐unsaturated enone building blocks together. Prepared compounds were evaluated for the cytotoxicity against a panel of cancer cell lines. An indolyl ketone called JP18 was identified as a cellcycleregulator, and the underlying mechanism was investigated.
Highly enantioselective synthesis of 1,3-mercapto alcohols from α,β-unsaturated ketones: asymmetric bifunctional group exchange reaction
作者:Hiroaki Shiraki、Kiyoharu Nishide、Manabu Node
DOI:10.1016/s0040-4039(00)00395-6
日期:2000.4
3-mercapto alcohols were synthesized from α,β-unsaturatedketones using a chiral reagent B and dimethylaluminum chloride in two steps. The transformation involved a tandemMichael addition–MPV reduction and a base-catalyzed elimination. The two newly created chiral carbons in trans-chalcone derivatives were enantioselectively controlled to a high degree. Using the above transformation, an asymmetric bifunctional
Intermolecular Conjugate Addition of Pyrroloindoline and Furoindoline Radicals to α,β-Unsaturated Enones<i>via</i>Photoredox Catalysis
作者:Shupeng Zhou、Deliang Zhang、Yu Sun、Ruofan Li、Wenhao Zhang、Ang Li
DOI:10.1002/adsc.201400702
日期:2014.9.15
We have developed an intermolecularconjugateaddition of 3a‐pyrroloindoline/furoindolineradicals to α,β‐unsaturated enones, through visible‐light photoredox catalysis. Ir(ppy)2(dtbbpy) PF6 was found to be an effective promoter to initiate this reaction from readily available 3a‐bromopyrroloindolines/furoindolines. This method was exploited to prepare a series of indole terpenoid‐like compounds of
Synthesis of Chiral Thienylpyridines from Naturally Occurring Monoterpenes: Useful Ligands for Cyclometallated Complexes
作者:Michel Gianini、Alex von Zelewsky
DOI:10.1055/s-1996-4280
日期:1996.6
On treatment with ammonium acetate, α,β-unsaturated ketones or aldehydes can easily undergo condensation with acetylpyridinium salts (Kröhnke reaction). Four ”thienylpyridine” ligands, derived from (-)-β-pinene, (+)-camphor, (+)-3-carene and (+)-2-carene, were prepared according to this method. The multistep syntheses to get (1R,5R)-3-methyleneopinone (5), (+)-3-methylenecamphor (10), (-)-3-caren-10-al (15) and (1S,6R)-7,7-dimethyl-3-methylenebicyclo[4.1.0]heptan-2-one (18) are also described.
New chiral 2,2′:6′,2″-terpyridine ligands from the chiral pool: synthesis, crystal structure of a rhodium complex and uses in copper- and rhodium-catalyzed enantioselective cyclopropanation of styrene
作者:Hoi-Lun Kwong、Wing-Leung Wong、Wing-Sze Lee、Leung-Shi Cheng、Wing-Tak Wong
DOI:10.1016/s0957-4166(01)00431-1
日期:2001.10
A number of chiral G-symmetric 2,2':6'.2 " terpyridines L-1-L-4 were synthesized in moderate to good yields from commercially available chiral materials. Copper(II) and rhodium(Ill) chloride complexes of these ligands were prepared in good yields. The Rh(L-2)Cl-3 complex was isolated as a yellow crystalline solid and characterized by X-ray crystallography. Both Cu(L)(OTf)(2) and Rh(L)(OTf)(3) were found to be active catalysts in the cyclopropanation of styrene with ethyl diazoacetate. Enantioselectivity up to 82% e.e. was observed. (C) 2001 Elsevier Science Ltd. All rights reserved.