Photochemical reactions of thiobenzamides bearing an allylic substituent on the nitrogen atom: double-bond migration via tandem 1,4- and 1,6-hydrogen transfer
摘要:
N-(2-苯丙-2-烯基)硫代苯甲酰胺 1a–d 在照射下发生双键迁移,生成 N-(2-苯丙-1-烯基)硫代苯甲酰胺 2a–d,经历了连续的 1,4- 和 1,6-氢转移。N-(丙-2-烯基)硫代苯甲酰胺 1e 和 N-(3-苯丙-2-烯基)硫代苯甲酰胺 1f 的光反应未生成迁移产物,但以低产率生成了吡咯 3e 和 3f 及去烷基化产物 4a。
Synthesis and Cycloaddition Reactions of Stabilized Münchnones
作者:Taban K. K. Kakaawla、Will C. Hartley、Joseph P. A. Harrity
DOI:10.1002/ejoc.201600486
日期:2016.6
A family of stabilized munchnones bearing an acyl group at C4 have been prepared and studied in alkyne cycloadditionreactions. These reactions are highly regioselective, and the method represents a rapid and straightforward route to densely substituted pyrroles. Finally, the C4-stabilizing units can be further manipulated to furnish carboxylic acid and amide groups, or removed altogether to provide
1,3-Dipolar cycloadditions of nitrones derived from the reaction of acetylenes with hydroxylamines
作者:Albert Padwa、George S. K. Wong
DOI:10.1021/jo00366a009
日期:1986.8
PADWA A.; WONG G. S. K., J. ORG. CHEM., 59,(1986) N 16, 3125-3133
作者:PADWA A.、 WONG G. S. K.
DOI:——
日期:——
Photochemical reactions of thiobenzamides bearing an allylic substituent on the nitrogen atom: double-bond migration via tandem 1,4- and 1,6-hydrogen transfer
作者:Hiromu Aoyama
DOI:10.1039/a700247e
日期:——
N-(2-Phenylprop-2-enyl)thiobenzamides 1a–d
underwent
double-bond migration on irradiation to give
N-(2-phenylprop-1-enyl)thiobenzamides 2a–d via
consecutive 1,4- and 1,6-hydrogen transfer. Photoreaction of an
N-(prop-2-enyl)thiobenzamide 1e and an
N-(3-phenylprop-2-enyl)thiobenzamide 1f did not give migration
products, but afforded pyrroles 3e and 3f and dealkylation products 4a
in low yields.
N-(2-苯丙-2-烯基)硫代苯甲酰胺 1a–d 在照射下发生双键迁移,生成 N-(2-苯丙-1-烯基)硫代苯甲酰胺 2a–d,经历了连续的 1,4- 和 1,6-氢转移。N-(丙-2-烯基)硫代苯甲酰胺 1e 和 N-(3-苯丙-2-烯基)硫代苯甲酰胺 1f 的光反应未生成迁移产物,但以低产率生成了吡咯 3e 和 3f 及去烷基化产物 4a。
10.1039/d4ob00935e
作者:Brown, Emily B.、Gapare, Rosinah Liandrah、Campbell, Jacob W.、Alkaş, Adil、Sequeira, Steve、Hilborn, James W.、Greening, Sarah M.、Robertson, Katherine N.、Thompson, Alison
DOI:10.1039/d4ob00935e
日期:——
A new synthetic method to access α-nitroso pyrroles is presented. This method utilises the nitrosonium salt NOBF4, enabling short reaction times (<10 minutes) and avoiding the harsh acidic conditions usually associated with pyrrole nitrosation. Application of this procedure to diarylated pyrroles yielded several novel nitroso-pyrroles. Modifications to the method, through exclusion of air and inclusion