1129-89-1Relevant articles and documents
METHOD FOR PRODUCING CYCLODODECANONE
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Page/Page column 27-28, (2008/06/13)
The invention relates to a method for producing cyclododecanone by reacting cyclododecen with dinitrogen, especially a method comprising steps (I) and (II): (I) producing cyclododecen by partially hydrating cyclododecatriene; (II) reacting the cyclododecen obtained in step (I) with dinitrogen monoxide, thereby obtaining cyclododecanone.
Reaction of arylsulfonylhydrazones of aldehydes with α-magnesio sulfones. A novel olefin synthesis
Kurek-Tyrlik,Marczak,Michalak,Wicha,Zarecki
, p. 6994 - 7001 (2007/10/03)
Reactions of representative tosylhydrazones of aldehydes and ketones with α-metalated sulfones were examined in order to develop a practical olefination method. Treatment of aldehyde tosylhydrazone 2 with an excess of α-lithiated methyl phenyl or dimethyl sulfones yielded 3a. The reaction of 2 with sterically unhindered lithiated alkyl sulfones gave mixtures of the respective olefination products 3b-d along with the Shapiro fragmentation product 4. Sterically hindered lithiated sulfones afforded Shapiro products exclusively. In contrast, aldehyde tosylhydrazones 2 or 6 in reactions with a variety of α-magnesio primary or secondary alkyl sulfones gave olefination products 3a-j and 7a-c in high yields (Tables 1 and 2). β-Branched alkyl sulfones afforded predominantly (E)-alkenes, whereas unhindered primary sulfones gave mixtures of (E)- and (Z)- alkenes with low selectivity. Reaction of the 2,4,6-triisopropylbenzenesulfonylhydrazone (trisylhydrazone) of cyclodecanone 11c with α-magnesio methyl phenyl sulfone afforded the methylidene derivative 12a contaminated with the Shapiro product 13. Tosylhydrazone 2 resisted reaction with i-PrMgCl and gave only a small amount of the addition product in reaction with Bu2Mg. Some mechanistic aspects of the reaction of tosylhydrazones with organomagnesium compounds are discussed.
Synthesis of a Titaniumsilicoaluminate Isomorphous to Zeolite Beta and its Application as a Catalyst for the Selective Oxidation of Large Organic Molecules
Camblor, Miguel A.,Corma, Avelino,Martinez, Agustin,Perez-Parmente, Joaquin
, p. 589 - 590 (2007/10/02)
The isomorphous substitution of Si by Ti in the zeolite Beta framework by direct hydrothermal synthesis gives rise to useful catalysts for the selective oxidation of small and large organic compounds.
