Synthesis of (optically active) sulfur-containing trifunctional amino acids by radical addition to (optically active) unsaturated amino acids
摘要:
Sulfur-based radicals, generated from R-S-H-type precursors (R = alkyl, acyl) with AIBN, smoothly add to alpha-allylglycines protected at none, one, or both of the amino acid functions (NH2 and/or CO2H). Sulfur-containing trifunctional amino acids were obtained in good to excellent yields (64-100%). The solvent used for the reaction is critical. Optimal results were obtained when both the unsaturated amino acid and RSH dissolve completely in the medium (dioxane/water or methanol/water are good solvent systems). The scope of the reaction includes alpha-substituted alpha-allylglycine and derivatives as well as beta-substituted beta-allyl-beta-ammo alcohols. In the case of optically active alpha-allylglycine derivatives, radical addition is accompanied by a small amount of racemization, the amount depending on the type of protection and R-S-H. The products are easily optically enriched by crystallization. Addition of sulfur-based radicals to alpha-allylglycine is believed to be an example of a general method for synthesizing optically active trifunctional amino acids from unsaturated amino acids.
The present invention relates to dihydropyrrole compounds that are useful for treating cellular proliferative diseases, for treating disorders associated with KSP kinesin activity, and for inhibiting KSP kinesin. The invention is also related to compositions which comprise these compounds, and methods of using them to treat cancer in mammals.
PHOTOREACTIVE REGULATOR OF GLUTAMATE RECEPTOR FUNCTION AND METHODS OF USE THEREOF
申请人:Trauner Dirk
公开号:US20090181454A1
公开(公告)日:2009-07-16
The present invention provides a synthetic regulator of glutamate receptor function, which regulator is a light-sensitive (photoreactive) regulator. The present invention further provides a light-regulated glutamate receptor that includes a subject synthetic regulator non-covalently associated with the glutamate receptor. Also provided are cells and membranes comprising a subject light-regulated glutamate receptor. The present invention further provides methods of modulating glutamate receptor function, involving use of light. The present invention further provides methods of identifying agents that modulate glutamate receptor function.
The present invention relates to dihydropyrrole compounds that are useful for treating cellular proliferative diseases, for treating disorders associated with KSP kinesin activity, and for inhibiting KSP kinesin. The invention is also related to compositions which comprise these compounds, and methods of using them to treat cancer in mammals.
New use of glutamate antagonists for the treatment of cancer
申请人:Ikonomidou, Hrissanthi
公开号:EP1002535A1
公开(公告)日:2000-05-24
New therapies can be devised based upon a demonstration of the role of glutamate in the pathogenesis of cancer. Inhibitors of the interaction of glutamate with the AMPA, kainate, or NMDA receptor complexes are likely to be useful in treating cancer and can be formulated as pharmaceutical compositions. They can be identified by appropriate screens.
Treatment of glial tumors with glutamate antagonists
申请人:——
公开号:US20030050224A1
公开(公告)日:2003-03-13
The present invention relates to a method of treating glial tumors in a subject, which includes providing a glutamate antagonist or a NMDA receptor antagonist and administering the glutamate antagonist or NMDA receptor antagonist to a subject with a glial tumor of the brain or spinal cord under conditions effective to treat the glial tumor.