5018-30-4Relevant articles and documents
The Pentamethoxyallyl Cation
Moss, Robert A.,Guo, Wenjeng,Hagedorn, Alfred,Beveridge, Richard
, p. 1102 - 1103 (1982)
The pentamethoxyallyl cation is readily generated from pentamethoxychlorocyclopropane by treatment with AlBr3 or SnCl4 in CD2Cl2 or with SnCl4 in SO2.
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.
experimental part, p. 501 - 509 (2009/02/07)
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.
Catalytic decomposition of 5-diazo-2,2-dimethyl-1,3-dioxane-4,6-dione and its analogs
Shevchenko,Shakhmin,Nikolaev
, p. 1741 - 1744 (2007/10/03)
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