Air‐Stable Carbonyl(pentamethylcyclopentadienyl)cobalt Diiodide Complex as a Precursor for Cationic (Pentamethylcyclopentadienyl)cobalt(III) Catalysis: Application for Directed C‐2 Selective CH Amidation of Indoles
作者:Bo Sun、Tatsuhiko Yoshino、Shigeki Matsunaga、Motomu Kanai
DOI:10.1002/adsc.201301110
日期:2014.5.5
dienyl)cobalt diiodide complex [Cp*Co(CO)I2] was successfully utilized as the precursor of a cationic cobalt(III) active catalyst for directed CH bond functionalization. The complex Cp*Co(CO)I2 (2.5–1.25 mol%), in combination with silver hexafluoroantimonate (AgSbF6) and potassium acetate (KOAc), efficiently catalyzed the directed C‐2 selective amidation of indoles with sulfonyl azides, and the corresponding
容易获得的羰基(五甲基环戊二烯基)二碘化钴络合物[Cp * Co(CO)I 2 ]已成功地用作阳离子钴(III)活性催化剂的前体,用于定向CH键功能化。复杂的Cp * Co(CO)I 2(2.5–1.25 mol%)与六氟锑酸银(AgSbF 6)和乙酸钾(KOAc)结合有效地催化了吲哚与磺酰叠氮化物的定向C-2选择性酰胺化反应,并且得到相应的产物,收率为85-98%。