efficient for the oxidation of alcohols to carbonyl compounds, for the oxidative coupling of mercaptans into disulfides and for a mild cleavage of oximes to carbonyl compounds. Chlorotrimethylsilane-chromium trioxide has been shown to be an efficient oxidizing agent for the conversion of arylmethanes to benzaldehydes. The reagent is applied to the oxidative cleavage of some benzyl esters. A mild procedure
A new ferrocene-based bulky pyridine as an efficient reusable homogeneous catalyst
作者:Bishwapran Kashyap、Prodeep Phukan
DOI:10.1039/c3ra41674g
日期:——
An effective approach to reusing a homogeneous catalyst has been demonstrated. A ferrocene-based bulky pyridine has been synthesized and utilized as a homogeneous catalyst for the synthesis of benzoylfumarates as well as for acetylation. After the reaction, the catalyst was separated by simple precipitation and reused without appreciable loss of activity.
A mild and efficient method for esterification and transesterification catalyzed by iodine
作者:K Ramalinga、P Vijayalakshmi、T.N.B Kaimal
DOI:10.1016/s0040-4039(01)02235-3
日期:2002.1
a practical and useful Lewis acid catalyst for the esterification of carboxylicacids with alcohols. The high catalytic activity of iodine can be used for the transesterification of esters by different alcohols including tertiary alcohols and sterically hindered primary and secondary alcohols. The method presented is especially effective for simultaneous esterification and transesterification reactions
PROTECTION OF ALCOHOLS AND ACIDS WITH ALLYLSILANES CATALYZED BY IODINE OR IODOTRIMETHYLSILANE IN CHLORINATED HYDROCARBON
作者:Akira Hosomi、Hideki Sakurai
DOI:10.1246/cl.1981.85
日期:1981.1.5
Many triorganosilyl ethers and esters were prepared by the reaction of allylsilanes with alcohols catalyzed by iodine or iodotrimethylsilane in excellent yields. Bromine and bromotrimethylsilane were also effective catalysts.
A variety of alcohols have been oxidized under mild conditions by the DMSO–Ph3P·X2 complexes. The reaction does not produce any Pummerer product. A mechanism for the reaction is proposed.