Macrocyclic Compounds And Methods Of Making And Using The Same
申请人:Farmer J. Jay
公开号:US20080045585A1
公开(公告)日:2008-02-21
The present invention provides macrocyclic compounds useful as therapeutic agents. More particularly, these compounds are useful as anti-infective, anti-proliferative, anti-inflammatory, and prokinetic agents.
Arjona, Odon; Perez-Ossorio, Rafael; Perez-Rubalcaba, Alfredo, Journal of the Chemical Society. Perkin transactions II, 1981, p. 597 - 603
作者:Arjona, Odon、Perez-Ossorio, Rafael、Perez-Rubalcaba, Alfredo、Quiroga, Maria L.
DOI:——
日期:——
Arjona, Odon; Perez-Ossorio, Rafael; Perez-Rubalcaba, Alfredo, Journal of Chemical Research, Miniprint, 1982, # 9, p. 2351 - 2371
作者:Arjona, Odon、Perez-Ossorio, Rafael、Perez-Rubalcaba, Alfredo、Quiroga, Maria L.、Romero, Dolores
DOI:——
日期:——
Reversed Stereochemical Control in the Presence of CeCl<sub>3</sub> and TiCl<sub>4</sub> in the Lewis Acid Mediated Reduction of α-Alkyl-β-keto Esters by Metal Hydrides. A General Methodology for the Diastereoselective Synthesis of <i>s</i><i>yn</i>- and <i>a</i><i>nti</i>-α-Alkyl-β-hydroxy Esters
The Lewis acid-mediated reduction of alpha-alkyl-beta-keto esters has been shown to proceed by different stereochemical control depending on the nature of the metal atom. Strongly chelating TiCl4 led to the syn isomer in high diastereomeric excess in noncoordinating solvents (CH2Cl2) at -78 degrees C with BH3. py as reducing agent, while nonchelating CeCl3 gave a high excess of the anti isomer in coordinating solvents (THF) at the same temperature with lithium triethylborohydride (LiEt3BH) as reducing agent. The methodology has been successfully utilized for obtaining important syn- and anti-alpha-alkyl-beta-hydroxy esters with high diastereoselectivity.