Vítek Dominik, Tydlitát Jiří, Dostál Libor, Erben Milan, Podzimek Štěpán, Růžičková Zdeňka, Vinklárek Jaromír, Jambor Roman
Department of General and Inorganic Chemistry, University of Pardubice, Pardubice, 532 10, Czech Republic.
Institute of Organic Chemistry and Techology, University of Pardubice, Pardubice, 532 10, Czech Republic.
Chemistry. 2025 Jul 17;31(40):e202501543. doi: 10.1002/chem.202501543. Epub 2025 Jul 2.
The reactions of the monomeric C,N-chelated organogermanium(II) hydride L(H)Ge·BH (1) with potassium alkoxides KOR provided potassium hydrido-alkoxo-germanato-borates {K(THF)[BH·Ge(L)(H)(OR)]} (R = tBu (2), C(CH)CHCH (3)) as products of KOR addition. Compounds 2 and 3 react with benzaldehyde under formation of alkyl esters of benzoic acid along with elimination of a neutral complex L(H)Ge·BH (1). Thus complex 1 was tested as a useful catalyst for esterification of aldehydes by KOBu. The GC-MS analysis revealed formation of t-butyl esters of appropriated carboxylic acids. The mechanistic studies for the esterification of benzaldehyde with KOBu catalyzed by 1 were also performed either theoretically (DFT calculations), or experimentally (NMR and IR spectroscopy).
单体C,N-螯合氢化有机锗(II) L(H)Ge·BH (1) 与醇钾KOR反应，生成氢化-烷氧基-锗酸硼酸钾 {K(THF)[BH·Ge(L)(H)(OR)]}（R = tBu (2)，C(CH)CHCH (3)），这是KOR加成的产物。化合物2和3与苯甲醛反应，生成苯甲酸烷基酯，同时消除中性配合物L(H)Ge·BH (1)。因此，配合物1被测试为KOBu催化醛酯化反应的有效催化剂。气相色谱-质谱分析表明生成了相应羧酸的叔丁酯。还通过理论（密度泛函理论计算）或实验（核磁共振和红外光谱）对1催化KOBu与苯甲醛酯化反应的机理进行了研究。
