Synthesis of 3-(Arylsulfonyl)-3-pyrrolines from Allenyl Sulfonamides by Silver Ion Catalysis
作者:Rama Rao Tata、Chencheng Fu、Steven P. Kelley、Michael Harmata
DOI:10.1021/acs.orglett.8b02440
日期:2018.9.21
Treatment of allenyl sulfonamides with catalytic amounts of silver fluoride in acetonitrile at reflux afforded the corresponding 3-sulfonyl-3-pyrrolines in excellent yields by intramolecular hydroamination via a 5-endo-trig cyclization. The starting allenyl sulfonamides were prepared by lithiation of allenic sulfones and trapping with various N-sulfonylimines.
The Synthesis of Trimethylsilylmethyl Allylic Sulfones
作者:Michael Harmata、Barry F. Herron
DOI:10.1055/s-1993-25828
日期:——
3-Arylsulfonyl-2-[(trimethylsilyl)methyl]alkenes are easily prepared by the reaction of trimethylsilylmethyl cuprates with the appropriate 1-(arylsulfonyl)alka-1,2-dienes.
Rh(<scp>iii</scp>)-Catalyzed chemo-, regio- and stereoselective carboamination of sulfonyl allenes with <i>N</i>-phenoxy amides or <i>N</i>-enoxy imides
作者:Min Wu、Haiman Zhang、Ting Wang、Shuang Lin、Ziyang Guo、Hui Gao、Zhi Zhou、Wei Yi
DOI:10.1039/d2cc02982k
日期:——
The Rh(III)-catalyzed chemo-, regio- and stereoselective carboamination of sulfonyl allenes has been realized by virtue of either N-phenoxy amides or N-enoxy imides simultaneously acting as the C- and N-sources, via redox-neutral tandem C–H activation/allene insertion/oxidative addition/C–Nbond formation for the direct construction of allylamine derivatives equipped with an α-quaternary carbon center
Rh( III ) 催化的磺酰基丙二烯的化学选择性、区域选择性和立体选择性碳胺化反应是通过N-苯氧基酰胺或N-烯氧基酰亚胺同时作为 C-和 N-源,通过氧化还原中性串联实现的C-H活化/丙二烯插入/氧化加成/C-N键形成,用于直接构建配备α-季碳中心的烯丙胺衍生物。该协议具有高原子经济性和良好的底物兼容性,在复杂分子的后期 C-H 修饰方面表现出深远的合成潜力。
Cinquini,M. et al., Journal of the Chemical Society. Perkin transactions I, 1978, p. 247 - 249