A Free‐Radical Reduction and Cyclization of Alkyl Halides Mediated by FeCl
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作者:Feba Thomas Pulikottil、Ramadevi Pilli、Vetrivelan Murugesan、Chandu G. Krishnan、Ramesh Rasappan
DOI:10.1002/cctc.201900230
日期:2019.5.20
Iron mediated catalytic reactions are of great interest in the field of organic synthesis because they are economic and naturally abundant. However, the use of iron catalyst in the field of free radicalcyclization or reduction of alkyl halides remains limited. Here we describe the use of an unprecedented combination of iron and zinc in the reduction and 5‐exo‐trig radicalcyclization of alkyl halides
A new strategy for the preparation of an active Mn(0) and its use for radical cyclization reactions
作者:Jun Tang、Hiroshi Shinokubo、Koichiro Oshima
DOI:10.1016/s0040-4020(98)01205-8
日期:1999.2
Reduction of Li2MnCl4 with magnesium in THF afforded a fairly active manganese species which readily initiated radical cyclization of 2-iodoethanal allylic acetals at room temperature. The corresponding 2-bromoethanal acetals also provided the same cyclized products upon treatment with the activated manganese reagent at reflux in THF. This reagent can also be used to induce tandem radical cyclizations
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.