Free radical reactions for heterocycle synthesis. Part 7: 2-Bromobenzoic acids as building blocks in the construction of spirobenzolactones and spirobenzolactams
作者:Wei Zhang、Georgia Pugh
DOI:10.1016/s0040-4020(03)00655-0
日期:2003.6
A straightforward 2-step parallel synthesis for structurally diversified spiro compounds is developed. 2-Bromobenzoic acids are used as common building blocks to couple with a series of conjugated enoles or enamines. Sequential intramolecular free radical Michael additions lead to formation of spirobenzolactones, spirobenzolactams, spirobenzolactone-lactams, spiorbenzolactone-thiolactones, spiordilactones
Novel amino acid ester and reagent composition for detecting leucocytes or elastase in body liquid
申请人:KYOTO DAIICHI KAGAKU CO., LTD.
公开号:EP0661280A1
公开(公告)日:1995-07-05
An amino acid ester of the formula: (X-O-A-)n-Y in which X is derived from an aromatic or heterocyclic compound: X-OH or its derivative; A is a residue of a L-amino acid, n is an integer of at least 2, and Y is a N-substituent of an amino acid derived from a compound having the same or different two or more carbonyl or sulfonyl groups which is formed from a single or complex compound selected from the group consisting of noncyclic or cyclic hydrocarbons having 1 to 10 carbon atoms, saturated or unsaturated heterocyclic compounds, aromatic compounds, organosilicon compounds having 1 to 10 silicon atoms, monosaccharides and oligosaccharide comprising 2 to 10 monosaccharides, all of which may have a substituent and/or a hetero atom to form the complex, which ester is specifically hydrolyzed by leucocytes or elastase.
Substituted 1, 4-thiazepine and analogs as activators of caspases and inducers of apoptosis and the use thereof
申请人:Cytovia, Inc.
公开号:US20020010169A1
公开(公告)日:2002-01-24
The present invention is directed to substituted 1,4-thiazepine and analogs thereof, represented by the general Formula I:
1
wherein the dashed lines, A
1
, A
2
, A
3
, X
1
and R
1
are defined herein. The present invention also relates to the discovery that compounds having Formula I are activators of capases and inducers of apoptosis. Therefore, the activators of caspases and inducers of apoptosis of this invention can be used to induce cell death in a variety of clinical conditions in which uncontrolled growth and spread of abnormal cells occurs.
formaldehyde under basic condition. Similarly, the electrochemical oxidation and the treatment of 6 under Knoevenagel reaction conditions are the other alternative procedure described for the preparation of these bis compounds. However, the first method lacks generality as it involves aqueous reaction media and the second procedure is useful to obtain only the methylene bridged bispyrone derivatives
Free radical reactions for heterocycle synthesis. Part 3: Formation of novel spirodilactones, spirolactone-lactams, and spirolactone-thiolactones
作者:Wei Zhang
DOI:10.1016/s0040-4039(00)00256-2
日期:2000.4
Synthesis of spirodilactones is achieved by intramolecular free radical Michael addition of enol esters derivatized from tetronic acid. Synthesis of spirolactone-lactams and spirolactone-thiolactones is also covered by the scope of this new reaction.