7576-36-5Relevant academic research and scientific papers
Synthesis of Diazanorcaradienes and 1,2-Diazepines via the Tandem [4+2]-Cycloaddition/Retro-[4+2]-Cycloaddition Reaction between Methoxycarbonylcyclopropenes and Dimethoxycarbonyltetrazine
Belyy, Alexander Yu.,Levina, Anastasia A.,Platonov, Dmitry N.,Salikov, Rinat F.,Medvedev, Michael G.,Tomilov, Yury V.
, p. 4133 - 4138 (2019/03/17)
The reaction of di(methoxycarbonyl)tetrazine with substituted cycloprop-2-ene-1-carboxylates gives a series of 3,4-diazanorcaradienes and 1,2-diazepines. The influence of the nature of cyclopropenes and the reaction conditions on its selectivity was inves
Synthesis of 3-aryl-3-trimethylsilylcyclopropenes and their dibenzoyl derivatives. Possible cyclopropenyl anion precursors?
Han, Sangdon,Kass, Steven R.
, p. 1553 - 1558 (2007/10/03)
3-Aryl-3-trimethylsilylcyclopropenes (1) were synthesized by a four-step reaction sequence starting from known benzoyl trimethylsilanes. These cyclopropenes were thermalized on a gas chromatography column and the products were collected and identified. Their 1, 2-dibenzoyl derivatives (2) were prepared in a two-step transformation beginning with 3-aryl-1, 2, 3-tris(trimethylsilyl)cyclopropenes (5), the ultimate intermediates in the syntheses of 1. These compounds (2) are rare examples of isolable cyclopropenes with electron withdrawing groups at the vinyl positions. Fluoride-induced desilylation reactions of electron deficient cyclopropenes also are described and a carbon-centered electrophile has been successfully used to trap a putative cyclopropenyl anion.
1,2,3-Triazines, IV. - Synthesis of 1,2,3-Triazinecarboxylates
Neunhoeffer, Hans,Bopp, Ralf,Diehl, Werner
, p. 367 - 374 (2007/10/02)
1,2,3-Triazinecarboxylates 5 have been prepared by rearrangement of the cyclopropenyl azides 6 as well as by oxidation of the 1-aminopyrazoles 9, 10.Reaction of 1-aminopyrazole-5-carboxylates 10 with triethyl orthoformate (19) and ammonia affords pyrazolotriazin-4-ones 18 Key Words: 1,2,3-Triazines / Cyclopropenyl azides / Pyrazoles / Pyrazolotriazines
STEREOCHEMISTRY OF THE ADDITION OF CHLORINE TO METHYL 2,3-DIPHENYL-2-CYCLOPROPENECARBOXYLATE
Grigorova, T. N.,Komendantov, M. I.
, p. 265 - 267 (2007/10/02)
The reaction of chlorine with methyl 2,3-diphenyl-2-cyclopropenecarboxylate was investigated.The addition of chlorine to the cyclopropene double bond takes place stereospecifically at the cis position.The structure and configuration of the obtained methyl
