Chemistry of 5-oxodihydroisoxazoles. Part 17.1 Acylation of 5-oxodihydroisoxazoles
作者:Rolf H. Prager、Jason A. Smith、Ben Weber、Craig M. Williams
DOI:10.1039/a700133i
日期:——
2-Unsubstituted isoxazol-5(4H)-ones and
-5(2H)-ones may be acylated by acid chlorides,
anhydrides or carboxylic acids in the presence of carbodiimides, to give
O- and N-acylated products. The solvent, the presence
of base and the temperature are found to alter the product ratios
dramatically, but the substituents present at C-3 have the greatest
effect. Aliphatic acid anhydrides and chlorides generally react at
nitrogen, but aroyl halides give significant proportions of
O-acylated products. Limited success in converting
O-aroyl to N-aroyl isoxazolones is reported.
The chemistry of 5-oxodihydroisoxazoles. Part 19.1 The synthesis and photolysis of N-thioacylisoxazol-5(2H)-ones
作者:Rolf H. Prager、Max R. Taylor、Craig M. Williams
DOI:10.1039/a700646b
日期:——
5-Oxodihydroisoxazoles react with thiocarbonyl chlorides to afford
N-thioacylisoxazol-5(2H)-ones which lose carbon
dioxide under photochemical conditions and undergo intramolecular
cyclisation of the iminocarbene to afford thiazoles. However, in some
cases loss of carbon dioxide is accompanied by loss of sulfur, giving
1,3-oxazin-6-ones.
[EN] COMPOUNDS AND COMPOSITIONS FOR INHIBITING THE ACTIVITY OF SHP2<br/>[FR] COMPOSÉS ET COMPOSITIONS POUR L'INHIBITION DE L'ACTIVITÉ DE SHP2
申请人:NOVARTIS AG
公开号:WO2017216706A1
公开(公告)日:2017-12-21
The present invention relates to compounds of formula I: in which Y1, Y2, R1, R2 and R3 are defined in the Summary of the Invention; capable of inhibiting the activity of SHP2. The invention further provides a process for the preparation of compounds of the invention, pharmaceutical preparations comprising such compounds and methods of using such compounds and compositions in the management of diseases or disorders associated with the aberrant activity of SHP2.
The Synthesis of Potential DNA Intercalators. 2. Tri- and Tetra-Cyclic Heterocycles
作者:Ali Reza Molla Ebrahimlo、Jabbar Khalafy、Rolf H. Prager
DOI:10.1071/ch08370
日期:——
The reaction of 1,4-dichlorophthalazine and 2,3-dichloroquinoxaline with some isoxazolones gave their mono- and bis-isoxazolinyl derivatives. The base-catalyzed rearrangement of these derivatives afforded the corresponding tri- and tetracyclic heterocycles.
A short and efficient method for the synthesis of pyrimido[1,2-a]quinolines
作者:A. Poursattar Marjani、J. Khalafy
DOI:10.1007/s10593-011-0725-0
日期:2011.4
A new series of pyrimido[1,2-a]quinolines has been synthesized in good to excellent yields by rearrangement of N-quinolinylisoxazol-5(2H)-ones, substituted at nitrogen, with 2-chloroquinoline derivatives under mild base-catalyzed conditions. This method has the advantage of a short syntheticroute.