β-Phosphorylated five-membered ring nitroxides: synthesis and ESR study of 2-phosphonyl-4-(hydroxymethyl)pyrrolidine aminoxyl radicals
摘要:
Intramolecular aminomercuration of the alkenyl alpha-amino phosphonate 6 followed by sodium borohydride reduction leads to the diethyl (4-(benzyloxymethyl)-2,5,5-trimethylpyrrolidinyl)-phosphonate 7. Oxidation of the phosphonates 7 and 8 with 3-chloroperbenzoic acid led to the stable 2-phosphonylpyrrolidinyl aminoxyl radicals 9 and 10 bearing a 4-(hydroxymethyl)substituent.
β-Phosphorylated five-membered ring nitroxides: synthesis and ESR study of 2-phosphonyl-4-(hydroxymethyl)pyrrolidine aminoxyl radicals
摘要:
Intramolecular aminomercuration of the alkenyl alpha-amino phosphonate 6 followed by sodium borohydride reduction leads to the diethyl (4-(benzyloxymethyl)-2,5,5-trimethylpyrrolidinyl)-phosphonate 7. Oxidation of the phosphonates 7 and 8 with 3-chloroperbenzoic acid led to the stable 2-phosphonylpyrrolidinyl aminoxyl radicals 9 and 10 bearing a 4-(hydroxymethyl)substituent.
Preparation of Aliphatic Ketones through a Ruthenium-Catalyzed Tandem Cross-Metathesis/Allylic Alcohol Isomerization
作者:David Finnegan、Benjamin A. Seigal、Marc L. Snapper
DOI:10.1021/ol060918g
日期:2006.6.1
shown to be effective catalysts for cross-metatheses of allylic alcohols with cyclic and acyclic olefins, as well as isomerization of the resulting allylic alcohols to alkyl ketones. The net result of this new tandem methodology is a single-flask process that provides highly functionalized, ketone-containing products from simple allylic alcohol precursors. [reaction: see text]