Highly Selective Mild Stepwise Allylation of <i>N</i>-Methoxybenzamides with Allenes
作者:Rong Zeng、Chunling Fu、Shengming Ma
DOI:10.1021/ja303790s
日期:2012.6.13
allylation of N-methoxybenzamides 1 with polysubstituted allenes is reported. This C-H functionalization involving allenes is conducted under very mild conditions (-20 °C or room temperature) and compatible with ambient air and moisture, and it can be applied to terminal or internal allenes with different synthetically attractive functional groups. Highly efficient axial chirality transfer has been realized
报道了 N-甲氧基苯甲酰胺 1 与多取代丙二烯的有效 Rh(III) 催化逐步邻位烯丙基化。这种涉及丙二烯的 CH 官能化是在非常温和的条件下(-20 °C 或室温)进行的,并且与环境空气和水分兼容,它可以应用于具有不同合成吸引力官能团的末端或内部丙二烯。已经实现了高效的轴向手性转移,产生了光学活性内酯。
Rhodium-catalyzed cycloisomerization of allenenes via metalacycle intermediates
作者:Tatsuya Makino、Kenji Itoh
DOI:10.1016/s0040-4039(03)01461-8
日期:2003.8
In the presence of a catalytic amount of the rhodium complex, allenenes undergo cycloisomerization reactions to result in the selective formation of five and seven membered exo-alkylidenecarbocycles and heterocycles via novel exo-alkylidenei-hodacyclopentane intermediates. (C) 2003 Elsevier Ltd. All rights reserved.