Effect of catalyst on zwitterionic intermediacy in additions of dimethyl diazomalonate to vinyl ethers
作者:Miguel E. Alonso、Raiza Fernández
DOI:10.1016/s0040-4020(01)81010-3
日期:1989.1
The reaction of dimethyl diazomalonate with 2-alkoxy-6-methyl-3,4-dihydro-2H-pyran in hot fluorobenzene has been studied in the presence of some transition metal catalysts. The characteristic addition-elimination reaction that afforded the 3-malonyl-pyran derivative 3 was found to proceed with the intervention of highly polar species, as indicated by the appearance of skeletal rearrangement products
Production Process Of Tetrahydropyran Compound And Tetrahydropyran Compound Produced By The Production Process
申请人:Yamagami Isao
公开号:US20080139828A1
公开(公告)日:2008-06-12
The invention provides a production, process of a tetrahydropyran compound, characterized by allowing 3,4-dihydro-2-alkoxy-2H-pyran compound or tetrahydro-2-alkoxy-2H-pyran compound which can be easily prepared through reaction between acrolein and alkylvinylether, with hydrogen in the presence of a catalyst containing an element of Groups VIII to X under acidic condition. The production process of the invention is useful for production of Grignard reaction solvent or polymer solvent and intermediate of organic compound.
Perkin communications. Improved synthesis of secondary hydroperoxides from alcohols
作者:Dee Ann Casteel、Kyeong-Eun Jung
DOI:10.1039/p19910002597
日期:——
Secondary hydroperoxides have been prepared from secondary alcohols by conversion of the alcohol into its mesylate and subsequent reaction with anhydrous hydrazine followed by hydrogen peroxide and sodium peroxide.
Participation of charged species in the thermocatalytic addition of diazo carbonyl compounds to electron-rich olefins. Addition-rearrangement of dimethyl diazomalonate to 2-methoxy-3,4-dihydro-2H-pyrans
作者:Miguel E. Alonso、Maria Del Carmen Garcia
DOI:10.1021/jo00207a016
日期:1985.4
The chemistry of 2-alkoxy-3,4-dihydro-2H-pyrans. 5. Addition of tert-butyl hypohalites to 3,4-dihydro-2H-pyran and its 2-alkoxy and 2-alkoxy-6-methyl derivatives in hydroxylic solvents