Organometallic Chemistry Laboratory and Advanced Catalyst Research Team, RIKEN Advanced Science Institute, Hirosawa, Wako, Saitama, Japan.
Angew Chem Int Ed Engl. 2011 Aug 22;50(35):8114-7. doi: 10.1002/anie.201101769. Epub 2011 Jul 7.
Caught in the act: N-Heterocyclic carbene copper(I) complexes (1; IPr=1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene) serve as an excellent catalyst for the carboxylation of alkylboranes (2; R=alkyl) with CO(2) to afford a variety of functionalized carboxylic acids (3) in high yields. A novel copper methoxide/alkylborane adduct (A) and its subsequent CO(2) insertion product (B) have been isolated and shown to be true active catalyst species.
N-杂环卡宾铜（I）配合物（1；IPr=1,3-双（2,6-二异丙基苯基）咪唑-2-亚基）可用作烷基硼烷（2；R=烷基）与 CO2 羧化反应的优良催化剂，以高产率得到各种官能化羧酸（3）。已分离出一种新型的铜甲醇盐/烷基硼烷加合物（A）及其随后的 CO2 插入产物（B），并证明它们是真正的活性催化剂物种。
