曙红-Y(EY)介导的烯烃烷基磺酰基氰化反应显示出可提供高收率的烷基磺酰基腈。根据瞬态吸收光谱法,反应通过光致电子从3 EY *转移至原位形成的光催化剂的O氰化衍生物而进行,并生成了被EY •氧化的亚磺酸盐。变成磺酰基。将后者加到烯烃上,然后进行自由基氰基基团转移,然后将腈与维持自由基链的RSO 2自由基一起提供。
<i>p</i>-Anisaldehyde-Photosensitized Sulfonylcyanation of Chiral Cyclobutenes: Enantioselective Access to Cyclic and Acyclic Systems Bearing All-Carbon Quaternary Stereocenters
作者:Vincent Pirenne、Iman Traboulsi、Lisa Rouvière、Jonathan Lusseau、Stéphane Massip、Dario M. Bassani、Frédéric Robert、Yannick Landais
DOI:10.1021/acs.orglett.9b04345
日期:2020.1.17
The photosensitized p-anisaldehyde-mediated addition of sulfonylcyanides onto the π-system of cyclobutenes is shown to afford highly functionalized cyclobutanes in high yields and diastereocontrol. The homochiral cyclobutene precursors are accessible on multigram scale in two steps through an asymmetric [2 + 2] cycloaddition/vinyl thioether reduction sequence. The enantiopure cyclobutylnitriles can
Radical nitrile transfer with methanesulfonyl cyanide or p-toluenesulfonyl cyanide to carbon radicals generated from the acyl derivatives of N-hydroxy-2-thiopyridone
作者:Derek H.R. Barton、Joseph Cs. Jaszberenyi、Emmanouil A. Theodorakis
DOI:10.1016/s0040-4039(00)92696-0
日期:1991.7
Reaction of methanesulfonyl cyanide or p-toluenesulfonyl cyanide with carbon radicals generated from the acylderivatives of N-hydroxy-2-thiopyridone gives the corresponding nitriles in high yield. A mechanistic scheme is suggested.
The invention of radical reactions. Part XXIII new reactions: Nitrile and thiocyanate transfer to carbon radicals from sulfonyl cyanides and sulfonyl isothiocyanates.
作者:Derek H.R. Barton、Joseph Cs. Jaszberenyi、Emmanouil A. Theodorakis
DOI:10.1016/s0040-4020(01)88524-0
日期:1992.3
Reaction of p-toluenesulphonyl cyanide or methanesulfonyl cyanide with carbon radicals, generated from the corresponding O-acyl-N-hydroxy-2-thiopyridone derivatives by visible light photolysis gives nitriles in good yield. The homolysis products of these sulfonyl nitriles can also be trapped by electron rich olefins. We have also found that carbon radicals react easily with mesyl or tosyl isothiocyanate
Process for the production of 2-azabicyclo [2.2.1] hept-5-en-3-one
申请人:Lonza Ltd.
公开号:US05200527A1
公开(公告)日:1993-04-06
2-Azabicyclo[2.2.1]hept-5-en-3-one is produced by Diels-Alder reaction of cyclopentadiene and methanesulfonyl cyanide and then hydrolytic cleavage of the methanesulfonyl group.
Enantioselective Total Synthesis of (+)‐Eucophylline
作者:Iman Traboulsi、Nitin S. Dange、Vincent Pirenne、Frédéric Robert、Yannick Landais
DOI:10.1002/chem.202200088
日期:2022.3.16
Two strategies based respectively on the free-radical carbo- and sulfonyl-cyanation of cyclopropenes and cyclobutenes were developed to achieve the totalenantioselectivesynthesis of (+)-eucophylline, a monoterpene alkaloid isolated from Leuconotis eugenifolius.