Dimethyl amino[(phenylthio)methyl]malonate: a useful C-3 unit in a mild, direct synthesis of oxazole-4-carboxylates
摘要:
N-Acyl derivatives of the title compound undergo oxidative cyclization upon treatment with N-chlorosuccinimide in DMF to form dimethyl 4,5-dihydro(phenylthio)oxazole-4,4-dicarboxylates 4 which then are decarbomethoxylated with concomitant loss of thiophenoxide to form 2-substituted-4-carbomethoxy-5-unsubstituted oxazoles 1. The mildness and generality of this method has been demonstrated by the synthesis of a variety of examples, including a fragment used for a synthesis of calyculin A.
Dimethyl amino[(phenylthio)methyl]malonate: a useful C-3 unit in a mild, direct synthesis of oxazole-4-carboxylates
摘要:
N-Acyl derivatives of the title compound undergo oxidative cyclization upon treatment with N-chlorosuccinimide in DMF to form dimethyl 4,5-dihydro(phenylthio)oxazole-4,4-dicarboxylates 4 which then are decarbomethoxylated with concomitant loss of thiophenoxide to form 2-substituted-4-carbomethoxy-5-unsubstituted oxazoles 1. The mildness and generality of this method has been demonstrated by the synthesis of a variety of examples, including a fragment used for a synthesis of calyculin A.
Die Erfindung betrifft neue sulfonylierte Carbonsäureamide der allgemeinen Formel (I)
in welcher
n, A, R¹, R² und R³ die in der Beschreibung angegebenen Definitionen haben sowie deren Salze, Verfahren zu ihrer Herstellung und ihre Verwendung als Herbizide.
Synthesis of new ligands for targeting the S1P1 receptor
作者:Stefanie S. Schilson、Petra Keul、Rizwan S. Shaikh、Michael Schäfers、Bodo Levkau、Günter Haufe
DOI:10.1016/j.bmc.2015.01.014
日期:2015.3
Sphingosine-1-phosphate (S1P) influences various fundamental biological processes by interacting with a family of five G protein-coupled receptors (S1P(1-5)). FTY720, a sphingosine analogue, which was approved for treatment of relapsing forms of multiple sclerosis, is phosphorylated in vivo and acts as an agonist of four of the five S1P receptor subtypes. Starting from these lead structures we developed new agonists for the S1P(1) receptor. The biological activity was tested in vivo and promising ligands were fluorinated at different positions to identify candidates for positron emission tomography (PET) imaging after [F-18]-labelling. The radioligands shall enable the imaging of S1P(1) receptor expression in vivo and thus may serve as novel imaging markers of S1P-related diseases. (C) 2015 Elsevier Ltd. All rights reserved.
Dimethyl amino[(phenylthio)methyl]malonate: a useful C-3 unit in a mild, direct synthesis of oxazole-4-carboxylates
作者:Rafael Shapiro
DOI:10.1021/jo00073a040
日期:1993.10
N-Acyl derivatives of the title compound undergo oxidative cyclization upon treatment with N-chlorosuccinimide in DMF to form dimethyl 4,5-dihydro(phenylthio)oxazole-4,4-dicarboxylates 4 which then are decarbomethoxylated with concomitant loss of thiophenoxide to form 2-substituted-4-carbomethoxy-5-unsubstituted oxazoles 1. The mildness and generality of this method has been demonstrated by the synthesis of a variety of examples, including a fragment used for a synthesis of calyculin A.