排序方式: 共有81条查询结果,搜索用时 0 毫秒
41.
L. G. Voskressensky T. N. Borisova A. A. Titov A. V. Listratova L. N. Kulikova A. V. Varlamov V. N. Khrustalev G. G. Aleksandrov 《Russian Chemical Bulletin》2012,61(6):1231-1241
The reactions of partially hydrogenated indole-fused quinolizines and indolizines with activated alkynes in methanol, acetonitrile, and dichloromethane were studied. The reactions were shown to be accompanied by the cleavage of the bridging C-N bond. Azecino[5,4-b]-indole and indolo[3,2-e][2]benzazonine derivatives were synthesized. 相似文献
42.
43.
L. G. Voskressensky T. N. Borisova E. A. Sorokina L. N. Kulikova A. V. Kleimenov S. V. Tolkunov A. V. Varlamov 《Chemistry of Heterocyclic Compounds》2009,45(10):1248-1251
It has been shown that, on interacting 2-ethyl-3,3,5,5-tetramethyl- and 2-ethyl-1,3,3,5,5-pentamethyl-1,2,4,5-tetrahydro-3H-benz-2-azepines
with ethyl propiolate in methanol, fission of the azepine ring occurs at the C(1)–N(2) bond involving a molecule of solvent.
The indicated azepines do not react with acetylenedicarboxylic acid ester under these conditions. 相似文献
44.
L. G. Voskressensky T. N. Borisova S. A. Kovaleva A. V. Listratova L. N. Kulikova V. N. Khrustalev M. V. Ovcharov A. V. Varlamov 《Russian Chemical Bulletin》2012,61(2):370-379
Tetrahydropyrido[4??,3??:4,5]thieno[2,3-d]pyrimidines in the presence of activated alkynes were transformed into mixtures of pyrimido[5??,4??:4,5]thieno[3,2-d]azocines and spiro[pyridine-4,5??-thieno[2,3-d]pyrimidines]. 相似文献
45.
L. G. Voskressensky M. V. Ovcharov T. N. Borisova L. N. Kulikova A. V. Listratova R. S. Borisov A. V. Varlamov 《Chemistry of Heterocyclic Compounds》2011,47(2):222-228
It has been established that 2-R-4-oxotetrahydropyrido[4,3-d]pyrimidines, under the action of activated alkynes in methanol, form a mixture of 2-R-4-oxohexahydropyrimido[4,5-d]azocines and products of decomposition of the tetrahydropyridine ring, the 2-R-5-methoxymethyl-4-oxo-6-vinylaminoethyl-pyrimidines. Tetrahydropyrido[3,4-d]pyrimidine, isomeric at the junction of the pyrimidine and tetrahydropyridine rings, forms only the corresponding pyrimido[5,4-d]azocine, the product of expansion, under the action of methyl propiolate. 相似文献
46.
47.
Leonid G. Voskressensky Ekaterina A. SokolovaAlexey A. Festa Alexey V. Varlamov 《Tetrahedron letters》2013
A one-pot protocol towards previously unreported derivatives of thiochromeno [2′,3′:4,5] imidazo[2,1-a]isoquinoline via a domino reaction of isoquinoline-derived iminium salts and α-mercapto benzaldehydes is elaborated. 相似文献
48.
49.
50.
Astakhov Grigorii S. Shigaev Rinat R. Borisova Tatiana N. Ershova Anastasia A. Titov Alexander A. Varlamov Alexey V. Voskressensky Leonid G. Matveeva Maria D. 《Molecular diversity》2021,25(4):2441-2446
Molecular Diversity - A convenient protocol for the synthesis of 5,6-dihydropyrrolo[2,1-a]isoquinolines with various electron-withdrawing substituents at C-2 atom is described. This approach is... 相似文献