Direct alkenylation of arylamines at the ortho-position with magnesium alkylidene carbenoids and some theoretical studies of the reactions
作者:Tsuyoshi Satoh、Yumi Ogino、Kaori Ando
DOI:10.1016/j.tet.2005.08.035
日期:2005.10
1-Chlorovinyl p-tolyl sulfoxides were synthesized from ketones and chloromethyl p-tolyl sulfoxide in high yields. Treatment of the sulfoxides with isopropylmagnesium chloride at −78 °C in toluene gave magnesium alkylidene carbenoids (α-chloro alkenylmagnesium chlorides), which were treated with N-lithio arylamines to afford ortho-alkenylated arylamines in moderate yields. The reaction, in some cases, proceeded
Magnesium alkylidene carbenoids: Generation from 1-halovinyl sulfoxides with Grignard reagents and studies on their property, mechanism, and some synthetic uses
the ligand exchange reaction of sulfoxides with Grignard reagents. The generated magnesium alkylidene carbenoids were found to be stable at −78 °C for over 30 min. The carbenoids reacted with aldehydes to give the adducts in moderate yields; however, they were found to be relatively unreactive to usual electrophiles. The generated magnesium alkylidene carbenoid exists in equilibriumbetween an α-halo
Photolysis of 3-chlorodiazirine in the presence of alkenes. Kinetic evidence for intervention of a carbene-alkene intermediate in addition of chlorocarbene to alkene
作者:Hideo Tomioka、Norihiro Hayashi、Yasuji Izawa、Michael T. H. Liu
DOI:10.1021/ja00314a051
日期:1984.1
Photolyse de benzyl-3 chloro-3 diazirines dans le cyclohexane conduisant aux cis- et trans-β-chlorostyrenes, via un chlorobenzylcarbene. En presence d'alcenes, formation de cyclopropanes syn- et anti. Rendements. Cinetique
通过 un chlorobenzylcarbene 光解苄基-3 氯-3 二氮杂环己烷导管辅助顺式和反式-β-氯苯乙烯。En 存在 d'alcenes,形成 de cyclopropanes synet anti。演绎。电影