Carbocyclization by Radical Closure onto O-Trityl Oximes: Dramatic Effect of Diphenyl Diselenide
摘要:
O-Trityl oximes of 5- and 6-iodoaldehydes undergo radical cyclization to produce oximes when treated in refluxing tetrahydrofuran (THF) with Bu3SnH, 1,1'-azobis(cyclohexanecarbonitrile), i-Pr2NEt, and diphenyl diselenide (PhSeSePh).
An Easy Procedure for the Highly Regioselective Conversion of Epoxides to Halohydrins
作者:Bonini、Giuliano、Righi、Rossi
DOI:10.1080/00397919208021317
日期:1992.7
Several epoxides and epoxy alcohols have been opened to the corresponding halohydrins by lithium halides with Amberlyst in CH3CN at room temperature : the reaction proceeds in quantitative yields with high degree of regioselectivity.
MACROCYCLIC PEPTIDES AS HCV NS3 PROTEASE INHIBITORS
申请人:Merck Sharp & Dohme Corp.
公开号:EP1913016B1
公开(公告)日:2013-01-16
Carbocyclization by Radical Closure onto <i>O</i>-Trityl Oximes: Dramatic Effect of Diphenyl Diselenide
作者:Derrick L. J. Clive、Mai P. Pham、Rajendra Subedi
DOI:10.1021/ja067117t
日期:2007.3.1
O-Trityl oximes of 5- and 6-iodoaldehydes undergo radical cyclization to produce oximes when treated in refluxing tetrahydrofuran (THF) with Bu3SnH, 1,1'-azobis(cyclohexanecarbonitrile), i-Pr2NEt, and diphenyl diselenide (PhSeSePh).
H2TPP Organocatalysis in Mild and Highly Regioselective Ring Opening of Epoxides to Halo Alcohols by Means of Halogen Elements
found that elementaliodine and bromine are converted to trihalide nucleophiles (triiodine and tribromide anion, respectively) in the presence of catalytic amounts of meso-tetraphenylporphyrins (H2TPP). Therefore a highly regioselective method for the synthesis of beta-haloalcohols through direct ringopening of epoxides with elementaliodine and bromine in the presence of H2TPPs as new catalysts is described