141036-68-2Relevant articles and documents
The catalytic Friedel-Crafts acylation reaction starting from aromatic compounds and free carboxylic acids (or their trimethylsilyl esters) by promotion of silicon (IV) cationic species via mixed anhydrides
Suzuki,Kitagawa,Mukaiyama
, p. 3729 - 3734 (1993)
In the presence of active cationic species generated from silicon(IV) chloride and silver perchlorate, carboxylic acids or their trimethylsilyl esters react with p-trifluoromethylbenzoic anhydride to form corresponding mixed anhydrides in situ. Then the catalytic Friedel-Crafts acylation reaction between initially formed mixed anhydrides and coexisted aromatic compounds smoothly proceeds at room temperature to afford the corresponding aromatic ketones in high yields. The above two sequential reactions are effectively promoted by the active silicon(IV) catalyst under mild conditions.
Synthesis and catalytic reactivity in Friedel–Crafts acylations of monobridged bis(cyclopentadienyl)molybdenum(I) carbonyl complexes
Yan, Xin Long,Zhang, Ning,Hao, Zhi Qiang,Ma, Zhi Hong,Han, Zhan Gang,Zheng, Xue Zhong,Lin, Jin
, p. 75 - 79 (2018/04/11)
When the monobridged biscyclopentadienes (C5H5)R(C5H5) [R = C(CH3)2 (1), Si(CH3)2 (2), C(CH2)5 (3)] reacted with Mo(CO)6 in refluxing xylene, the corresponding complexes [(η5-C5H4)2R][Mo(CO)3]2 [R = C(CH3)2 (4), Si(CH3)2 (5), C(CH2)5 (6)] were obtained. These complexes were separated by chromatography and characterized by elemental analysis, IR, and 1H NMR spectroscopy. The molecular structures of 4 and 5 were determined by X-ray diffraction analysis. Friedel–Crafts acylation reactions of anisole derivatives with aromatic or aliphatic acyl chlorides catalyzed by complexes 4–6 showed that all of these monobridged bis(cyclopentadienyl)molybdenum carbonyl complexes have catalytic activity.
Syntheses, structures, and catalytic activity in Friedel–Crafts acylations of substituted tetramethylcyclopentadienyl molybdenum carbonyl complexes
Li, Tong,Yan, Xin-Long,Li, Zhan-Wei,Ma, Zhi-Hong,Li, Su-Zhen,Han, Zhan-Gang,Zheng, Xue-Zhong,Lin, Jin
, p. 313 - 322 (2018/02/22)
Reactions of the substituted tetramethylcyclopentadienes [C5HMe4R] [R?=?tBu, Ph, CH2CH2C(CH3)3] with Mo(CO)3(CH3CN)3 in refluxing xylene gave a series of dinuclear molybdenum carbonyl complexes [(η5-C5Me4R)Mo(CO)3]2 [R?=?tBu (1), Ph (2), CH2CH2C(CH3)3 (3)], [(η5-C5MetBu)Mo(μ-CO)2]2 (4)], and [(η5-C5Me4)tBu]2Mo2O4(μ-O) (5)], respectively. Complexes 1–5 were characterized by elemental analysis, IR, 1H NMR, and 13C NMR spectroscopy. In addition, their crystal structures were determined by X-ray crystal diffraction analysis. The catalytic activities of complexes 1–3 in Friedel–Crafts acylation in the presence of o-chloranil has also been investigated; the reactions were achieved under mild conditions to give the corresponding products in moderate yields.
The catalytic Friedel-Crafts acylation reaction of aromatic compounds with carboxylic anhydrides using combined catalyst system of titanium(IV) chloride tris(trifluoromethanesulfonate) and trifluoromethanesulfonic acid
Izumi, Jun,Mukaiyama, Teruaki
, p. 739 - 740 (2007/10/03)
Various aromatic ketones are prepared in good to high yields with carboxylic anhydrides using combined catalyst system of TiCl(OTf)3 and TfOH.
An Efficient Catalytic Friedel-Crafts Acylation Reaction of Equimolar Amounts of Aromatic Compounds and Free Carboxylic Acids or Their Trimethylsilylesters via Mixes Anhydrides
Mukaiyama, Teruaki,Suzuki, Kaoru
, p. 1751 - 1754 (2007/10/02)
In the presence of an active catalyst generated from SiCl4 and AgClO4, the Friedel-Crafts acylation reaction between equimolar amount of aromatic compounds and mixed anhydrides, formed in situ from free carboxylic acids (or their trimethylsilylesters) and p-trifluoromethylbenzoic anhydride, smoothly proceeds at room temperatureto afford the corresponding aromatic ketones in high yields.
A Novel Catalyst System, Antimony(V) Chloride-Lithium Perchlorate (SbCl5-LiClO4), in the Friedel-Crafts Acylation Reaction
Mukaiyama, Teruaki,Suzuki, Kaoru,Han, Jeong Sik,Kobayashi, Shu
, p. 435 - 438 (2007/10/02)
A novel catalyst system consisting of antimony(V) chloride (SbCl5) and lithium perchlorate (LiClO4) effectively promotes the Friedel-Crafts acylation reaction of aromatic compounds with acid anhydrides.
