Synthesis and intramolecular photocycloadditions of 2-acyloxy-3-hexenoyl cyclohexenones: Diastereoselectivity in the intramolecular [2+2] photocycloadditions of alkenes and cyclohexenones tethered by four atoms
作者:Michael T. Crimmins、Bryan W. King、Paul S. Watson、Lisa E. Guise
DOI:10.1016/s0040-4020(97)90403-8
日期:1997.6
The intramolecular [2+2] photocycloaddition of 2-acyloxy-2-3-hexenoylcyclohexenones has been shown to be highly diastereoselective. The cycloadditions produce exclusively cis fused products and the sense and level of selectivity is consistent with a molecular mechanics model for initial bond formation in the stepwise cycloaddition.
Transition metal promoted acetylene isomerisation reactions in organic synthesis
作者:Peter Quayle、Shopna Rahman、E.Lucy M. Ward、John Herbert
DOI:10.1016/s0040-4039(00)73103-0
日期:1994.5
A transitionmetal mediated acetylene-vinylidene rearrangement has been developed for the synthesis of spirocyclic lactones
已经开发出过渡金属介导的乙炔-亚乙烯基重排用于合成螺环内酯
Compositions useful as inhibitors of protein kinases
申请人:Jimenez Juan-Miguel
公开号:US20050148603A1
公开(公告)日:2005-07-07
The present invention relates to compounds useful as inhibitors of protein kinases. The invention also provides processes for preparing the compounds, pharmaceutically acceptable compositions comprising the compounds, and methods of using the compounds and compositions in the treatment of various disease, conditions, or disorders.
Cytotoxic bicyclo[7.3.1]tridec-4-ene-2,6-diyne compounds and process for
申请人:Bristol-Myers Squibb Company
公开号:US05198560A1
公开(公告)日:1993-03-30
The present invention relates to a novel and efficient process for the preparation of 8-hydroxybicyclo[7.3.1]tridec-4-ene-2,6-diyne ring system which is part of the aglycone of esperemicin and to novel cytotoxic antitumor agents having said bicyclic ring system. The present invention also provides a method for treating mammalian malignant tumors by administering to an animal in need of such treatment an antitumor effective amount of a compound of the present invention.
Synthesis of Fused Oxabicyclic Systems by Metal-Catalyzed Intramolecular Addition of 1,3-Cycloalkyldiones to Alkynes
作者:Moisés Gulías、J. Ramón Rodríguez、Luis Castedo、José L. Mascareñas
DOI:10.1021/ol0345632
日期:2003.5.1
[reaction: see text] Readily available 4-propargyl-1,3-cyclohexanediones and cyclopentanediones can be chemo- and regioselectively cycloisomerized to synthetically appealing fused oxabicyclic systems by simply stirring at room temperature with catalytic amounts of an appropriate metal complex.