189628-39-5Relevant articles and documents
Development of a Phase-Transfer-Catalyzed, [2,3]-Wittig Rearrangement
Denmark, Scott E.,Cullen, Lindsey R.
, p. 11818 - 11848 (2015/12/11)
An investigation into the use of phase-transfer catalysis for the [2,3]-sigmatropic rearrangement of allyloxy carbonyl compounds is described. Initial studies focused on identifying viable substrate classes that would undergo selective [2,3]-rearrangement under phase-transfer catalysis. Under certain conditions, the [2,3]-sigmatropic rearrangement of allyloxy carbonyl compounds takes place in the presence of a phase-transfer agent, providing a rare example of a phase-transfer-catalyzed unimolecular reaction. In the course of this investigation, it was found that catalysis is dependent on several variables including base concentration, catalyst structure, and substrate lipophilicity. Preliminary testing of chiral, nonracemic phase-transfer catalysts has shown promising levels of enantioselectivity for future development.
Synthesis and structure-activity relationships of new disubstituted phenyl-containing 3,4-diamino-3-cyclobutene-1,2-diones as CXCR2 receptor antagonists
Lai, Gaifa,Merritt, J. Robert,He, Zhenmin,Feng, Daming,Chao, Jianhua,Czarniecki, Michael F.,Rokosz, Laura L.,Stauffer, Tara M.,Rindgen, Diane,Taveras, Arthur G.
, p. 1864 - 1868 (2008/12/21)
A series of 3,4- and 3,5-disubstituted phenyl-containing cyclobutenedione analogues were synthesized and evaluated as CXCR2 receptor antagonists. Variations in the disubstitution pattern of the phenyl ring afforded new compounds with potent CXCR2 binding
