A silver-catalyzed chlorination of benzylic, tertiary, and secondary C(sp3)–H bonds was developed. The reaction proceeded with as low as 0.2 mol % catalyst loading at room temperature under air atmosphere with synthetically useful functional group compatibility. The regioselectivity and reactivity tendencies suggest that the chlorination proceeded through a radical pathway, but an intermediate alkylsilver
Kinetic resolution of primary alcohols having remote stereogenic centers: lipase mediated kinetic resolution of (±)-3-chloro-3-arylpropanols
作者:Alper Isleyen、Cihangir Tanyeli、Özdemir Dogan
DOI:10.1016/j.tetasy.2006.06.001
日期:2006.6
Kineticresolutions of (±)-3-chloro-3-arylpropanols by lipase mediated acetylation are described for the first time. Acetylation with CCL provided the best enantioselectivity amongst the enzymes used. Enantiomerically enriched products were obtained with up to 78% ee after two successive lipase-catalyzed acetylations. Different substituents on the aromatic ring and bromide, instead of chloride, on
Oxetanes. VII. Synthesis from 1,3-Diols. Reactions of Oxetanes and of 1,3-Butanediol with Hydrogen Chloride, Hydrogen Bromide and Acetyl Chloride<sup>1,2</sup>
作者:Scott Searles、Kenneth A. Pollart、Frank Block
DOI:10.1021/ja01561a047
日期:1957.2
PRODRUG COMPOUNDS AND THEIR USES
申请人:Ligand Pharmaceuticals, Inc.
公开号:EP3105238A1
公开(公告)日:2016-12-21
[EN] PRODRUG COMPOUNDS AND THEIR USES<br/>[FR] COMPOSÉS DE PROMÉDICAMENTS ET LEURS UTILISATIONS
申请人:LIGAND PHARM INC
公开号:WO2015123352A1
公开(公告)日:2015-08-20
Provided herein are prodrug compounds, their preparation and their uses, such as treating liver diseases or nonliver diseases via intervening in molecular pathways in the liver. Novel prodrug compounds of acid/alcohol derivatives such as phosphates, phosphonates, phosphonamidates, phosphoramidates, carboxylates, phenolates, and alkoxylates, their preparation and their uses are described. Some of the novel prodrug compounds described herein do not generate a vinyl keto reactive intermediate in the activation process. Another aspect includes the use of prodrugs to treat diseases that benefit from enhanced drug distribution to the liver and like tissues and cells.