444143-65-1Relevant articles and documents
Selective sulfonylation of arenes and benzoylation of alcohols using lithium perchlorate as a catalyst under neutral conditions
Bandgar,Kamble,Sadavarte,Uppalla
, p. 735 - 738 (2002)
Sulfonylation of aromatics with p-toluenesulfonyl chloride and benzoylation of alcohols with benzoyl chloride using lithium perchlorate as a catalyst is described. The remarkable selectivity under neutral conditions is an attractive feature of this method.
Co(thd)2: A superior catalyst for aerobic epoxidation and hydroperoxysilylation of unactivated alkenes: Application to the synthesis of spiro-1,2,4-trioxanes
O'Neill, Paul M.,Hindley, Stephen,Pugh, Matthew D.,Davies, Jill,Bray, Patrick G.,Park, B. Kevin,Kapu, Dauda S.,Ward, Stephen A.,Stocks, Paul A.
, p. 8135 - 8138 (2007/10/03)
Bis(2,2,6,6-tetramethyl-3,5-heptanedionato)cobalt(II) (Co(thd) 2), a β-diketonate prepared in a simple one-step procedure, is an excellent catalyst for aerobic epoxidation and Mukaiyama-Isayama hydroperoxysilylation of unactivated alkenes. For hydroperoxysilylation, Co(thd)2 is superior to Co(acac)2 and can catalyse oxidation of cyclic alkenes in excellent yield. Chiral β-diketonate or keto iminato catalysts failed to catalyse this reaction in an enantioselective manner and a free radical mechanism consistent with this observation is proposed. Hydroperoxysilylation of cyclohex-1-enylmethanol by Co(thd) 2 followed by addition of a ketone/TsOH provides a simple one-pot procedure for the synthesis of spiro-1,2,4-trioxane antimalarials.
