Reactions of 6-(Dimethylamino)fulvene with diazoazoles and arene- and azolediazonium salts
作者:E. V. Sadchikova、D. L. Alekseeva、I. A. Ushakov、V. G. Nenajdenko
DOI:10.1134/s1070428017100098
日期:2017.10
6-(Dimethylamino)fulvene reacted with 3- and 4-substituted 5-diazoazoles, as well as with 4-substituted benzene- and pyrazole-5-diazonium salts, in an aprotic solvent with high regioselectivity at an extremely high rate to give acyclic coupling products at the α-carbon atom of the cyclopenta-1,3-diene fragment. The nature of the diazo component did not affect the reaction direction, rate, or yield
Synthesis of new azolo[5,1-d][1,2,3,5]tetrazin-4-ones–analogs of antitumor agent temozolomide
作者:E. V. Sadchikova
DOI:10.1007/s11172-016-1522-9
日期:2016.7
the reactions with alkyland aryl isocyanates was studied. A number of new imidazo-and pyrazolo[5,1-d][1,2,3,5]tetrazin-4 ones were synthesized, which are analogs of temozolomide. It was shown that diazoazoles do not react with isothiocyanates under similar conditions.
PASE synthesis of 1-azolyl-1H-1,2,4-triazoles by the reaction of diazoazoles with ethyl isocyanoacetate
作者:Elena V. Sadchikova、Daria L. Alexeeva、Valentine G. Nenajdenko
DOI:10.1016/j.mencom.2019.11.016
日期:2019.11
PASE (pot, atom and step economic) synthesis of 1-azolyl-1H-1,2,4-triazole derivatives in up to 91% yield has been accomplished by addition of 5-diazoazoles to ethyl isocyanoacetate.
calculations suggest a 1,4-dipole behaviour (also viewed as a 1,7-dipole behaviour) for most diazoazoles when reacting with electron-rich alkenes; it is believed that the approach between 2-diazo-2H-imidazole and alkenes to give rise to the [4 + 2]-cycloadducts is quite asynchronous. Finally, some errors found in the literature concerning the reactivity of diazoazoles with alkoxy-ethenes have been corrected