Combination of NH2OH·HCl and NaIO4: an effective reagent for molecular iodine-free regioselective 1,2-difunctionalization of olefins and easy access of terminal acetals
Selective, Convenient and Efficient Deprotection of Trimethylsilyl and Tetrahydropyranyl Ethers, Ethylene Acetals and Ketals with Oxone under Non-aqueous Conditions
An efficient and selective method for the deprotection of trimethylsilyl (TMS) and tetrahydropyranyl (THP) ethers, ethylene acetals and ketals to their corresponding alcohols and carbonyl compounds using oxone in refluxing acetonitrile is described. Excellent chemoselectivity of this method makes it a useful and practical procedure in organic synthesis.
Aromatic Nitration under Neutral Conditions Using Nitrogen Dioxide and Ozone as the Nitrating Agent. Application to Aromatic Acetals and Acylal
作者:Hitomi Suzuki、Shuji Yonezawa、Tadashi Mori
DOI:10.1246/bcsj.68.1535
日期:1995.6
can be nitrated smoothly with nitrogen dioxide in ice-cooled dichloromethane or acetonitrile in the presence of ozone and magnesium oxide to give ortho- and para-nitro derivatives as the major product in good combined yields, the acetal ring as a protective group remaining almost intact. An acylal derived from benzaldehyde similarly undergoes nitration on the aromatic ring to give an isomeric mixture
Lifetimes of .alpha.-dialkoxy carbocations produced via radical cations generated by electron transfer and photoionization in aqueous solution
作者:S. Steenken、R. A. McClelland
DOI:10.1021/ja00195a061
日期:1989.6
Obtention des carbocations diethoxy-1,1 alkylium par reaction du diethylacetal de phenyl-1 alcanones-2 avec le radical SO 4 −•
获得碳正离子二乙氧基-1,1 烷基对反应二乙缩醛脱苯基-1 烷酮-2 avec le 自由基 SO 4 −•
Salmi et al., Suomen Kemistilehti B, 1947, vol. 20, p. 1,4
作者:Salmi et al.
DOI:——
日期:——
Magnetic isotope effects in photochemical reactions. Observation of carbonyl oxygen-17 hyperfine coupling to phenylacetyl and benzoyl radicals. Oxygen-17 enrichment studies