Aqueous carbonate complexes of AnIV ions, An(CO3)n4−2n, n = 1−5, form stepwise with increasing solution pH and carbonate concentration.46,197,202,206 As with other oxoanionic ligand systems, the stability of the carbonate complexes decreases across the series, such that the...
The strong conditions of the Perkin reaction may be circumvented by using phenylacetyl chloride in the presence of potassium carbonate in place of the anhydride in the preparation of 3-phenylcoumarins 〈81S887〉. However, 3-alkylcoumarins are not accessible in this way. The reaction of 2,2-di...
It can be prepared in this way: Sodium carbonate generates the sodium salt which is then reacted with sodium cyanide to provide the cyano acetic acid salt via a nucleophilic substitution. The nitrile group can be hydrolyzed with sodium hydroxide to sodium malonate and acidification affords malonic...
A novel process for preparing cis-chrysanthemic acid comprising (1) hydrolysis of trans-&dgr;-halogenodihydrochrysanthemic acid or ester thereof under neutrally kept condition with an alkaline earth metal carbonate, (2) conversion of the... T Honda,N Itaya,A Higo,... - US 被引量: 12发...
(+/-)-(3R*,4S*,5R*)-4-hydroxy-5-methoxy-5-methyl-3-phenylsulfanyl-2-pyrrolidinone Conditions ConditionsYield With sodium hydrogencarbonate In tetrahydrofuran; water at 20℃; for 24h; Inert atmosphere; A 86%B 7.8 mgC 18.2 mgD 2.5 mgE 2.3 mg 143-07-7 lauric acid 148553-50-8 ...
8. Manjunathan, P., Ravishankar, R. & Shanbhag, G. V. Novel bifunctional Zn–Sn composite oxide catalyst for the selective synthesis of glycerol carbonate by carbonylation of glycerol with urea. ChemCatChem 8, 631–639 (2016). 9. Zaki, M. & Knözinger, H. Carbon monoxide—a low ...
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With potassium carbonate In N,N-dimethyl-formamide at 0 - 20℃; for 4h; 1975-51-5 2-methyl-4-nitrobenzoic acid 75-65-0 tert-butyl alcohol tert-butyl 4-amino-2-methylbenzoate Conditions ConditionsYield Stage #1: 2-methyl-4-nitrobenzoic acid; tert-butyl alcohol With pyridine; p-toluenesulfo...
Dehydration of acetic acid by pervaporation through an asymmetric pol ycarbonate membrane[J]. Eur Polym J, 2001, 37 (3) : 527 - 534.Huang, James; Tu, Meng-Ling; Wang, Yi-Chieh; Li, Chi-Lan; Lee, Kueir-Rarn Lai, Juin-Yih "Dehydration of acetic acid by pervaporation through an ...
diethyl pyrocarbonate (DEPC) was used in 50 mM sodium phosphate buffer, pH 6.9, as described in Cheng and Nowak (38). In this case, hRARα was, prior to treatment with DEPC, desalted through a Chromaspin column (2 × 0.5 cm, Clontech) to avoid quenching of the reaction by imidazole...