Ring-transformations of pyrimidines by intramolecular diels-alder reactions. Synthesis of annelated fyridines
作者:A.E. Frissen、A.T.M. Marcelis、H.C. Van Der Plas
DOI:10.1016/0040-4020(89)80111-5
日期:1989.1
Pyrimidines carrying an ω-alkyne side-chain -XCH2CH2CCH (X=O,N,S,SO,SO2) at the 2 or 5 position undergo intramolecularinverseelectrondemandDiels-Alderreactions across the C-2 and C-5 positions; elimination of hydrogen (or alkyl) cyanide from the intermediate adducts leads to condensed pyridines. The influence of the hetero atom (X) in the dienophilic side-chain and that of substituents in the
Vinyl Dihydropyrans and Dihydrooxazines: Cyclizations of Catalytic Ruthenium Carbenes Derived from Alkynals and Alkynones
作者:Fermín Cambeiro、Susana López、Jesús A. Varela、Carlos Saá
DOI:10.1002/anie.201400675
日期:2014.6.2
A novel synthesis of 2‐vinyldihydropyrans and dihydro‐1,4‐oxazines (morpholine derivatives) from alkynals and alkynones has been developed. The cyclizations require a mild generation of catalytic ruthenium carbenes from terminal alkynes and (trimethylsilyl)diazomethane followed by trapping with carbonyl nucleophiles. Mechanistic aspects of the new cyclizations are discussed.
[EN] BICYCLIC HETEROCYCLE DERIVATIVES AND USE THEREOF AS GPR119 MODULATORS<br/>[FR] DÉRIVÉS HÉTÉROCYCLIQUES BICYCLIQUES ET LEUR UTILISATION EN TANT QUE MODULATEURS DE GPR119
申请人:SCHERING CORP
公开号:WO2009143049A1
公开(公告)日:2009-11-26
The present invention relates to Bicyclic Heterocycle Derivatives of formula (I), compositions comprising a Bicyclic Heterocycle Derivative, and methods of using the Bicyclic Heterocycle Derivatives for treating or preventing obesity, diabetes, a metabolic disorder, a cardiovascular disease or a disorder related to the activity of GPR1 19 in a patient.
Selective Synthesis of Epolactaene Featuring Efficient Construction of Methyl (<i>Z</i>)-2-Iodo-2-butenoate and (2<i>R</i>,3<i>S</i>,4<i>S</i>)-2-Trimethylsilyl-2,3-epoxy-4-methyl- γ-butyrolactone
作者:Ze Tan、Ei-ichi Negishi
DOI:10.1021/ol060856u
日期:2006.6.1
see text] (+)-Epolactaene was synthesized in 14 steps in the longest linear sequence. The synthesis is highlighted by a highly efficient preparation of the lactone intermediate 4, which only requires three steps from the commercially available (S)-3-butyn-2-ol. It also features a fully stereocontrolled synthesis of the intermediate 9, which was constructed through the use of Zr-catalyzed methylalumination
<i>S</i>-Farnesyl-Thiopropionic Acid Triazoles as Potent Inhibitors of Isoprenylcysteine Carboxyl Methyltransferase
作者:Joel A. Bergman、Kalub Hahne、Jiao Song、Christine A. Hrycyna、Richard A. Gibbs
DOI:10.1021/ml200106d
日期:2012.1.12
We report the design and synthesis of novel FTPA-triazole compounds as potent inhibitors of isoprenylcysteinecarboxylmethyltransferase (Icmt), through a focus on thioether and isoprenoid mimetics. These mimetics were coupled utilizing a copper-assisted cycloaddition to assemble the potential inhibitors. Using the resulting triazole from the coupling as an isoprenyl mimetic resulted in the biphenyl