Cobalt carbonyl ionic liquids based on the 1,1,3,3-tetra-alkylguanidine cation: Novel, highly efficient, and reusable catalysts for the carbonylation of epoxides

Efficient Thiolation of Alcohols Catalyzed by Long Chained Acid‐Functionalized Ionic Liquids under Mild Conditions

“…In our continuing effort on developing acidic ionic liquids catalyzed reactions,, , we synthesized a series of multi‐functionalized ionic liquids derived from pyrrolidine and applied them for the thiolation of alcohols (Figure ). Delightedly, the ionic liquids based on pyrrolidine exhibited more efficiency than general ionic liquids based on imidazole, providing up to 99 % yield with [BsCtP][OTf] as the catalyst at room temperature for 0.25 h (Scheme ).…”

Co(III)/Zn(II)-catalyzed dearomatization of indoles and coupling with carbenes from ene-yne ketones via intramolecular cyclopropanation

“…Notwithstanding the success, the investigation is limited to low functional group tolerance; certain N-substituent of indole failed to generate the desired product (Scheme 1(c)). As well-established and efficient catalysts for various organic transformations, Cp*Co(III) complexes have attracted increasing attention owing to their earth-abundance, cost-effectiveness, low toxicity, and unique catalytic reactivity [50][51][52][53][54][55]. However, the catalytic generation of efficient cyclopropanating intermediates from ene-yne ketone and Co(III)/Zn(II) remains largely underexplored.…”