Conjugate Additions of <i>o</i>-Iodoanilines and Methyl Anthranilates to Acetylenic Sulfones. A New Route to Quinolones Including First Syntheses of Two Alkaloids from the Medicinal Herb <i>Ruta chalepensis</i>
作者:Thomas G. Back、Masood Parvez、Jeremy E. Wulff
DOI:10.1021/jo026595t
日期:2003.3.1
especially when the aniline contained an electron-withdrawing substituent such as an ester group. In some cases, the reactions were enhanced by the presence of DMAP and the use of an excess of the sulfone in aqueousDMF. N-Formylanilines proved superior to free anilines. The products were either vinyl or allyl sulfones, depending on the conditions and the structure of the reactants. The acetylenic sulfone
2-substituted-4H-3, 1-benzoxazin-4-ones and benzthiazin-4-ones as
申请人:Warner-Lambert Company
公开号:US05652237A1
公开(公告)日:1997-07-29
This invention concerns certain 2-substituted-3,1-benzoxazin-4-ones and benzthiazinones as complement Clr protease inhibitors and antiinflammatory agents, pharmaceutical compositions containing them, methods of using them, and processes for their preparation.
Sulphuric acid immobilized on silica gel (H<sub>2</sub>SO<sub>4</sub>–SiO<sub>2</sub>) as an eco-friendly catalyst for transamidation
作者:Sk. Rasheed、D. Nageswar Rao、A. Siva Reddy、Ravi Shankar、Parthasarathi Das
DOI:10.1039/c4ra16571c
日期:——
A novel method of transamidation of carboxamides with amines using catalytic amounts of H2SO4–SiO2 under solvent-free conditions has been developed. The scope of the methodology has been demonstrated with primary and secondary amines.
Amides as precursors of imidoyl radicals in cyclisation reactions
作者:W. Russell Bowman、Anthony J. Fletcher、Jan M. Pedersen、Peter J. Lovell、Mark R.J. Elsegood、Elena Hernández López、Vickie McKee、Graeme B.S. Potts
DOI:10.1016/j.tet.2006.10.030
日期:2007.1
Amides have been successfully used as precursors of imidoyl radicals for radical cyclisation. The amides have been converted to imidoyl selanides via reaction with phosgene to yield imidoyl chlorides followed by reaction with potassium phenylselanide. Imidoyl selanides were reacted with tributyltin hydride (Bu3SnH) as the radical mediator with triethylborane or AIBN as initiators to yield imidoyl radicals
The present invention relates to compounds of formula (I) or pharmaceutical acceptable salts,
wherein A
1
, A
2
, A
3
, A
4
, X and Y are defined in the description. The present invention relates also to methods of making said compounds, and compositions containing said compounds which are useful for inhibiting kinases such as aurora and KDR.