108-59-8Relevant articles and documents
Catalytic oxidative decarboxylation of malic acid into dimethyl malonate in methanol with dioxygen
Liu, Junxia,Du, Zhongtian,Yang, Yanliang,Lu, Tianliang,Lu, Fang,Xu, Jie
, p. 2151 - 2154 (2012)
If you've got it, use it: Malic acid is converted into dimethyl malonate by a direct, one-pot process. The process is cyanide- and halide-free. Phosphovanadomolybdates serve as bifunctional catalysts, effecting the oxidative decarboxylation and esterification in a consecutive manner. Oxidative C-C bond cleavage first forms hemiacetals. The results serve as example for the production of valuable chemicals by fully utilizing the oxygen atoms and basic structure inherent to biomass products.
A stereospecific transannular Diels-Alder approach to the [6.6.7] tricyclic skeleton related to aphidicolin and scopadulan natural products
Hall,Caille,Drouin,Lamothe,Muller,Deslongchamps
, p. 1081 - 1088 (1995)
Model trans-cis-cis (TCC) macrocyclic triene 7 was synthesized using a convergent approach. Upon heating at 200°C, a 1,5-hydrogen-shift on the diene moiety was found to compete with the transannular Diels-Alder (TADA) reaction, thus leading to a mixture of tricyclic products. However, the diene rearrangement could be avoided by using boron trifluoride-diethyl ether complex as catalyst at reduced temperature (60°C). The exclusive formation of the trans-syn-cis [6.6.7] (TSC) tricyclic product 8 through an endo approach was observed. This result demonstrates the feasibility of a TADA strategy for synthesizing the title compounds and analogs.
Liquid Phase Carbonylation with Solid Catalyst. Carboxy Methylation of Dihalo Methane with Group VIII Metals Supported on Active Carbon
Yagita, Hiroshi,Kuwahara, Hiroyuki,Omata, Kohji,Fujimoto, Kaoru
, p. 335 - 338 (1990)
It was found that cobalt supported on active carbon showed an excellent catalytic activity for the carbonylation of dibromo methane in the liquid phase.For example, when the reaction was conducted under the conditions of 140 deg C, P (CO) = 31 atm, the yields of dimethyl malonate and bromomethyl acetate were 34.4percent and 22.2percent, respectively.Pd and Rh also showed catalytic activities.
STRUCTURE OF MONARDAEIN, A BIS-MALONYLATED ANTHOCYANIN ISOLATED FROM GOLDEN BALM, MONARDA DIDYMA
Kondo, Tadao,Nakane, Yukari,Tamura, Hirotoshi,Goto, Toshio,Eugster, C.H.
, p. 5879 - 5882 (1985)
Structure of monardaein was determined to be 3-O-(6-O-trans-p-coumaryl-β-D-glucopyranosyl)-5-O-(4,6-di-O-malonyl-β-D-glucopyranosyl) pelargonidin (1).
On the most powerful chemical traps for bis(methoxycarbonyl)carbene (=2-methoxy-1-(methoxycarbonyl)-2-oxoethylidene)
Shevchenko, Vladimir V.,Zhegalova, Natalya G.,Borzenko, Andey O.,Nikolaev, Valerij A.
, p. 501 - 509 (2008)
The efficiency and validity of different chemical substrates for trapping bis(methoxycarbonyl)carbene (=2-methoxy-1-(methoxycarbonyl)-2-oxoethylidene; 1) is dependent on the conditions of carbene generation. On conventional photolysis of dimethyldiazomalonate (=2-diazopropanedioic acid dimethyl ester; 2) by long-wave UV light (through a Pyrex filter, λ > 290 nm), the most powerful trap for carbene 1 in the series of substrates Me2S, MeOH, cyclohexane, and pyridine is Me2S (with an efficiency ratio of ca. 6 :4 : 2 : 1, resp.). When short-wave decomposition of diazomalonate 2 is employed (through a quartz filter, λ > 210 nm), more reliable and useful chemical traps for bis(methoxycarbonyl)carbene (1) are pyridine and cyclohexane, whose adducts with 1 are rather stable under short-wave-irradiation conditions. Application of alcohols for the trapping of 1 proves to be preferential when simultaneous monitoring of carbene and oxoketene formation during photolysis is necessary.
Synthesis of Alkyl(alkoxycarbonyl)tetracarbonyliron Complexes : the First Evidence of their Relevance to the Catalytic Cycle in the Carbonylation of Organic Halides induced by Pentacarbonyliron
Laurent, Pascale,Sabo-Etienne, Sylviane,Larsonneur, Anne-Marie,Abbayes, Herve des
, p. 929 - 930 (1988)
Reaction of (1-) (1) (R = Me or But) with BrCH2CO2Me produces stable complexes (3) which thermally decompose to yield Fe(CO)5 and malonic esters under a CO atmosphere; these reactions provide the first demonstration of possible key steps in the catalytic cycle of the carbonylation of reactive halides into esters with Fe(CO)5 and an alkoxide anion.
Esterification by ZrO2 and Mo-ZrO2 eco-friendly solid acid catalysts
Manohar, Basude,Reddy, Vangala R.,Reddy, Benjaram M.
, p. 3183 - 3187 (1998)
Esterification of mono- and dicarboxylic acids catalysed by single (ZrO2) and mixed oxide (Mo-ZrO2) eco-friendly solid acid catalysts is described. The Mo-ZrO2 catalyst exhibits better catalytic performance than ZrO2.
6-O-MALONYL-β-METHYL-D-GLUCOPYRANOSIDE FROM ROOTS OF RUMEX OBTUSIFOLIUS
Kasai, Takanori,Okuda, Michiko,Sakamura, Sadao
, p. 1131 - 1132 (1981)
From the methanol-soluble acidic fraction of Rumex obtusifolius 6-O-malonyl-β-methyl-D-glucopyranoside and ascorbalamic acid were isolated and identified.The identity of the former compound was confirmed by synthesis.Key Word Index- Rumex obtusifolius; Polygonaceae; roots; 6-O-malonyl-β-methyl-D-glucopyranoside; organic acids.
VAPOR PHASE CARBONYLATION OF METHYL CHLOROACETATE
Shinoda, Kiyonori,Yasuda, Kensei
, p. 9 - 10 (1985)
The vapor phase carbonylation of methyl chloroacetate (MCA) with rhodium trichloride supported on active carbon was carried out at 200-300 deg C.Dimethyl malonate (DMM) was obtained in good yield without any side reactions.
Palladium phthalocyaninesulfonate functionalized mesoporous polymer: A highly efficient photocatalyst for degradation of 4-chlorophenol under visible light irradiation
Xing, Rong,Wu, Lin,Fei, Zhenghao,Wu, Peng
, p. 15 - 20 (2013)
A novel sulfonated palladium phthalocyanine (PdPcS) modified FDU-15 mesoporous polymer (FDU-PdPcS) has been prepared by rationally chemical modification process. The PdPcS molecules were highly dispersed inside the confined mesopores, and were further stabilized through a π-π interaction with mesopolymer, which may prevent the PdPcS molecules from agglomerating and deactivating in photodegradation reactions. The physicochemical properties of thus prepared FDU-PdPcS material were characterized by XRD, N2 adsorption-desorption, UV-vis and inductively coupled plasma techniques. FDU-PdPcS proved to be highly efficient heterogeneous photocatalyst for the degradation of 4-chlorophenol (4-CP) in the presence of H2O 2 under visible light irradiation. The photodegradation of 4-CP with an initial concentration 0.6 mM was completed within 5 h at pH 11 using a dose of 0.2 g/L of the 0.12 wt% FDU-PdPcS photocatalyst. The photodegradation intermediates were identified by GC-MS. A possible mechanism involved in the photodegradation of 4-CP has also been discussed.
