Iron(II)-Catalyzed Sulfimidation and [2,3]-Sigmatropic Rearrangement of Propargyl Sulfides with tert-Butoxycarbonyl Azide. Access to N-Allenylsulfenimides
摘要:
The iron(II)-catalyzed Bach reaction of tert-butoxycarbonyl azide (BocN(3)) and allyl sulfides has been extended to include propargyl sulfides, which give N-allenylsulfenimide products. Using 10 mol % dppeFeCl(2) as catalyst the reaction proceeds at 0 degreesC with a number of different propargyl sulfides in 31-73% isolated yield. The reaction is limited by product instability toward catalyst and termination of the catalytic cycle by excess BocN3. N-Allenylsulfenimide 2b smoothly undergoes catalytic hydrogenation and a Diels-Alder reaction with cyclopentadiene.
Iron(II)-Catalyzed Sulfimidation and [2,3]-Sigmatropic Rearrangement of Propargyl Sulfides with tert-Butoxycarbonyl Azide. Access to N-Allenylsulfenimides
摘要:
The iron(II)-catalyzed Bach reaction of tert-butoxycarbonyl azide (BocN(3)) and allyl sulfides has been extended to include propargyl sulfides, which give N-allenylsulfenimide products. Using 10 mol % dppeFeCl(2) as catalyst the reaction proceeds at 0 degreesC with a number of different propargyl sulfides in 31-73% isolated yield. The reaction is limited by product instability toward catalyst and termination of the catalytic cycle by excess BocN3. N-Allenylsulfenimide 2b smoothly undergoes catalytic hydrogenation and a Diels-Alder reaction with cyclopentadiene.
Amination and [2,3]-sigmatropic rearrangement of propargylic sulfides using a ketomalonate-derived oxaziridine: synthesis of N-allenylsulfenimides
作者:Alan Armstrong、Richard S. Cooke、Stephen E. Shanahan
DOI:10.1039/b307722e
日期:——
Amination of propargylic sulfides with a ketomalonate-derived oxaziridine under metal free conditions gives N-Boc-N-allenylsulfenimides via [2,3]-sigmatropicrearrangement.
Iron(II)-Catalyzed Sulfimidation and [2,3]-Sigmatropic Rearrangement of Propargyl Sulfides with <i>tert</i>-Butoxycarbonyl Azide. Access to <i>N</i>-Allenylsulfenimides
作者:James P. Bacci、Kevin L. Greenman、David L. Van Vranken
DOI:10.1021/jo0340410
日期:2003.6.1
The iron(II)-catalyzed Bach reaction of tert-butoxycarbonyl azide (BocN(3)) and allyl sulfides has been extended to include propargyl sulfides, which give N-allenylsulfenimide products. Using 10 mol % dppeFeCl(2) as catalyst the reaction proceeds at 0 degreesC with a number of different propargyl sulfides in 31-73% isolated yield. The reaction is limited by product instability toward catalyst and termination of the catalytic cycle by excess BocN3. N-Allenylsulfenimide 2b smoothly undergoes catalytic hydrogenation and a Diels-Alder reaction with cyclopentadiene.