Rhodium(III)‐Catalyzed Allylic C(sp
<sup>3</sup>
)–H Activation of Alkenyl Sulfonamides: Unexpected Formation of Azabicycles
作者:Alexis Archambeau、Tomislav Rovis
DOI:10.1002/anie.201504150
日期:2015.11.2
Unsaturated N‐sulfonamides undergo a RhIII‐ catalyzed allylic C(sp3)H activation followed by insertion with an exogenous internal alkyne. The reaction generates [3.3.0], [4.3.0], and [5.3.0] azabicyclic structures with excellent diastereoselectivity. Deuterium labeling experiments implicate a 1,3‐Rh shift as a key step in the mechanism.
不饱和的N-磺酰胺经过Rh III催化的烯丙基C(sp 3)H活化,然后插入外源内部炔烃。该反应产生具有优异的非对映选择性的[3.3.0],[4.3.0]和[5.3.0]氮杂双环结构。氘标记实验暗示了1,3–Rh移位是该机制的关键步骤。