Reaction of dialkyldithiotrimethylsilylphosphites with acyl halides

It has been established that S,S-dialkyltrimethylsilyldithiophosphites react with acyl halides in two directions, depending on the nature of the halogen in the acyl halide and on the reaction conditions, thus giving as the main reaction products either dialkyldithiohalophosphites or dialkyldithioacylphosphonates. The latter compounds react with acyl halides in accordance with a retro-Arbuzov reaction scheme, giving dialkyldithiohalophosphites.A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan' Scientific Center, Russian Academy of Sciences, Kazan 420083. Translated from Izvestiya Akademii Nauk, Seriya Khimicheskaya, No. 4, pp. 1011–1016, April, 1992.     

Reaction of acyl isocyanates with pyridine

Conclusions The trichloroacetyl and trifluoroacetyl isocyanates react with pyridine to give N-(1-pyridinocarbonyl)trichloro(trifluoro)acetyl amidates, while ditrichloro(trifluoro)acetylcarbodiimides are formed in the presence of 3-phenyl-1-ethyl-3-phospholene 1-oxide, which add to the C = N bond of pyridine on the type of 1,4-cycloaddition.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 4, pp. 927–928, April, 1977.     

Reaction of silyl enol ethers with cyanogen chloride

Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 6, pp. 1447–1448, June, 1988.     

Reaction of o-aminophenol and p-benzoquinone in acetic acid

The reaction of o-aminophenol and p-benzoquinone in acetic acid yields phenoxazinones 1, 5 and 6 , phenoxazine 7 , triphenodioxazine 2 , ditriphenodioxazine 3 and the phenoxazinonyltriphenodioxazine 4 .     

Reaction of acyl isocyanates with 3-formylcamphor

Conclusions Benzoyl and trichloroacetyl isocyanates react with 3-formylcamphor to form only the O-addition, products.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 2, pp. 472–473, February, 1985.     

Reaction of aluminum triisopropylate with acyl peroxides

Summary Acyl peroxides react with aluminum triisopropylate at ordinary temperature with cleavage of an ester and formation of an alkoxyaluminum peracid salt which further oxidizes the isopropyl group to acetone and is converted into an alkoxyaluminum carboxylate.     

Reaction of acyl isocyanates with pyridine derivatives

Conclusions Trichloroacetyl isocyanate reacts with 2- and 4-picolines to form substituted trichloroacetylamidates. Benzoyl isocyanate forms a dimer in the presence of picolines. Depending on the nature of the solvent, trichloroacetyl isocyanate adds to 4-vinylp'yridine either at the vinyl group or at the ring nitrogen atom.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 9, pp. 2127–2130, September, 1984.     

Reaction of pentafluoroethyl radicals with hydrogen cyanide

The reaction of C₂F₅ radicals with HCN has been studied over the range of 533–673 K using the pyrolysis of pentafluoroethyl iodide as the free-radical source. Arrhenius parameters for the reaction relative to C₄F₁₀ recombination are given by where θ = 2.303RT kJ/mol and k_H/k is in cm^3/2/mol^1/2·s^1/2.     

Reaction of acyl isocyanates with β-keto esters

Conclusions Acyl isocyanates react with- keto esters to give both O- and C-addition products. The O-addition products subsequently rearrange to the thermodynamically more stable C-addition products.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 6, pp. 1344–1349, June, 1980.     

A facile synthesis of enol type acyl cyanides via a 1,3-dipolar cycloaddition reaction and a cyano group migration

The reaction of 7-chlorotetrazolo[1,5-a]quinoxaline 5-oxide 4a or 7-chloro-1,2,4-triazolo[4,3-a]quinoxaline 5-oxide 4b with 2-chloroacrylonitrile gave 7-chloro-4-(2-cyano-2-hydroxyvinyl)tetrazolo[1,5-a]quinoxaline 5a or 7-chloro-4-(2-cyano-2-hydroxyvinyl)-1,2,4-triazolo[4,3-a]quinoxaline 5b , respectively. Alcoholysis of compound 5a or 5b afforded 7-chloro-4-ethoxycarbonylmethylene-4,5-dihydrotetrazolo[1,5-a]quinoxaline 6a or 7-chloro-4-ethoxycarbonylmethylene-4,5-dihydro-1,2,4-triazolo[4,3-a]quinoxaline 6b , respectively. Compounds 5a,b were found to exist as a syn and anti mixture of the enol form, while compounds 6a,b occurred as the enamine and methylene imine forms. The tautoraeric character and/or D-H exchange of the vinyl protons are described for compounds 5a,b and 6a,b .     

Reaction of acyl derivatives of phosphorous acid with dienes

Conclusions Cyclic anhydrides, namely salicylphosphorous acid derivatives, react with conjugated dienic hydrocarbons and form phospholene derivatives, which do not contain the salicyclic acid moiety.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 6, pp. 1327–1329, June, 1971.