18728-61-5Relevant articles and documents
Substitution of Cyano Group by Hydroxyalkyl Group and of Ring Hydrogen by Alkoxyl Group in UV-Irradiation of 2-Pyridinecarbonitrile in Alcohols
Sugimori, Akira,Furihata, Toshikazu,Mikayama, Shigeyuki,Yoshida, Makiko,Nakanishi, Yasuo
, p. 2906 - 2910 (1982)
The UV-irradiation of 2-pyridinecarbonitrile(1) in methanol and in ethanol brings about the replacement of the cyano group by the hydroxyalkyl groups and the replacement of the ring hydrogen by the alkoxyl group.Free base-form of 1 in ethanol undergoes exclusively photo-hydroxyethylation, while the pyridinium form of 1 in ethanol undergoes both photo-hydroxyethylation via a singlet excited state and -ethoxylation via a singlet-excited state complex, which is quenched by the electron transfer from the aromatic hydrocarbons to the excited complex.
The Boekelheide reaction: Trifluoroacetic anhydride as a convenient acylating agent
Fontenas,Bejan,Haddou,Balavoine
, p. 629 - 633 (1995)
2-Alkyl substituted pyridine N-oxides react with trifluoroacetic anhydride at room temperature to give selectively and with high yields the corresponding 2-(α-hydroxyalkyl)-pyridines.
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Hanzlik,Hambung
, p. 1745,1746 (1978)
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Synthesis and catalytic activity of N-heterocyclic silylene (NHSi) iron (II) hydride for hydrosilylation of aldehydes and ketones
Du, Xinyu,Qi, Xinghao,Li, Kai,Li, Xiaoyan,Sun, Hongjian,Fuhr, Olaf,Fenske, Dieter
, (2021/05/29)
A novel silylene supported iron hydride [Si, C]FeH (PMe3)3 (1) was synthesized by C (sp3)-H bond activation with zero-valent iron complex Fe (PMe3)4. Complex 1 was fully characterized by spectroscopic methods and single crystal X-ray diffraction analysis. To the best of our knowledge, 1 is the first example of silylene-based hydrido chelate iron complex produced through activation of the C (sp3)?H bond. It was found that complex 1 exhibited excellent catalytic activity for hydrosilylation of aldehydes and ketones. The catalytic system showed good tolerance and catalytic activity for the substrates with different functional groups on the benzene ring. It is worth mentioning that, the experimental results showed that both ketones and aldehydes could be reduced in good to excellent yields under the same catalytic conditions. Based on the experiments and literature reports, a possible catalytic mechanism was proposed.
Zinc Hydride-Catalyzed Hydrofuntionalization of Ketones
Sahoo, Rajata Kumar,Mahato, Mamata,Jana, Achintya,Nembenna, Sharanappa
, p. 11200 - 11210 (2020/10/12)
Three new dimeric bis-guanidinate zinc(II) alkyl, halide, and hydride complexes [LZnEt]2 (1), [LZnI]2 (2) and [LZnH]2 (3) were prepared. Compound 3 was successfully employed for the hydrosilylation and hydroboration of a vast number of ketones. The catalytic performance of 3 in the hydroboration of acetophenone exhibits a turnover frequency, reaching up to 5800 h-1, outperforming that of reported zinc hydride catalysts. Notably, both intra- and intermolecular chemoselective hydrosilylation and hydroboration reactions have been investigated.
