- One-by-one hydrogenation, cross-coupling reaction, and Knoevenagel condensations catalyzed by PdCl2 and the downstream palladium residue
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A novel catalyst-economic strategy with a recovered palladium catalyst was successfully applied for multi-task and maximum reuse in different types of one-by-one downstream reactions, from catalytic hydrogenation to Suzuki and Sonogashira-type cross-coupling reactions, Knoevenagel condensations, and trans-Knoevenagel-like condensations.
- Wang, Hu,Li, Li,Bai, Xing-Feng,Deng, Wen-Hui,Zheng, Zhan-Jiang,Yang, Ke-Fang,Xu, Li-Wen
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supporting information
p. 2349 - 2355
(2013/09/12)
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- Nucleophilic substitution accompanying carbon-carbon bond cleavage assisted by a nitro group
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A 2-nitrated 3-oxoester reacted with amines or alcohols to afford unsymmetrical malonic acid derivatives as a result of nucleophilic substitution accompanying C-C bond cleavage. The 2-nitrated 3-oxoester easily formed ammonium salts with amines. When the amine is liberated from the salt under equilibrium, nucleophilic amine and electrophilic keto ester locate close to each other. This intimate pair effect causes a pseudo intramolecular reaction to occur, giving rise to effective substitution under mild conditions.
- Nakaike, Yumi,Taba, Noriko,Itoh, Shinobu,Tobe, Yoshito,Nishiwaki, Nagatoshi,Ariga, Masahiro
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scheme or table
p. 2413 - 2417
(2009/09/08)
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- Synthesis of 2/6-(polychloromethyl)pyridinecarboxylates
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Due to their relationship to certain bio-active 2,6-(polyfluoromethyl)-3,5-pyridinedicarboxylates 12, methodology was developed to prepare new, but analogous 2/6 (polychloromethyl)pyridinecarboxylates 6, 9, 10, 13, 18 and 20.Successful methods to prepare these materials include several chlorination procedures, mixed Hantzsch sequences, and aluminium chloride interchanges with 12 and 16.
- Chupp, John P.,Smith, Lowell R.
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p. 1785 - 1792
(2007/10/02)
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- ALKYLCOBALT CARBONYLS. VI. REACTION OF COBALT TETRACARBONYL WITH I2 DISSOLVED IN MeOH
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Reaction of EtOOCCH2Co(CO)4 with I2 dissolved in MeOH yields XCH2COOEt (X=H, I, COOMe): the product with X=COOMe was formed even in the reaction in Ar.
- Tasi, Miklos,Galamb, Vilmos,Palyi, Gyula
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p. C31 - C33
(2007/10/02)
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- A FACILE METHOD OF TRANSESTERIFICATION USING PHOSPHORUS YLID
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The transesterification of carboxylic esters catalysed with phosphorus ylid under neutral and mild conditions has been investigated.The reactions of esters having an electron withdrawing group with methanol proceeded rapidly and with high yield, whereas the reverse reactions proceeded slowly or not at all.
- Hashimoto, Shizunobu,Furukawa, Isao,Kuroda, Tomoyuki
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p. 2857 - 2860
(2007/10/02)
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