1,3-Dipolar cycloaddition between acetylenic dipolarophiles and sydnone-N-ylides as bis(1,3-dipoles)
作者:Florin Albota、Constantin Drăghici、Mino R. Caira、Florea Dumitrascu
DOI:10.1016/j.tet.2015.10.021
日期:2015.12
1,3-Dipolarcycloadditionreaction of sydnone-N-ylides, as model bis(1,3-dipoles), with acetylenicdipolarophiles in 1,2-epoxybutane under reflux gave exclusively pyrroloazines containing a sydnone moiety that resulted by preferred reaction of the N-ylide 1,3-dipole with the acetylenicdipolarophiles. The assembled sydnone-ylide hybrid structures were generated in situ from N-heteroaromatic bromides
A novel series of 5‐(p‐(prop‐2‐ynyloxy)phenyl)‐3‐aryl‐4,5‐dihydropyrazole‐1‐carbothioamides 2a‐f and functionalized 2‐(3‐(aryl)‐5‐(4‐(prop‐2‐ynyloxy)phenyl)‐4,5‐dihydropyrazol‐1‐yl)‐4‐(3‐arylsydnone‐4‐yl)thiazoles 4a‐l were synthesized. The newly synthesized compounds were elucidated by analytical and spectral analysis. From the single‐crystal X‐ray diffraction method, it was observed that 2d crystallizes
Synthesis of Sydnone Compounds Having Heterocyclic Groups at the 4-Positions from 4-(Bromoacetyl)sydnones
作者:Toshio Fuchigami、Takushi Goto、Mou-Yung Yeh、Tsutomu Nonaka、Hsien-Ju Tien
DOI:10.1246/bcsj.57.1362
日期:1984.5
New sydnone derivatives having heterocyclic substituents such as 4-thiazolyl, 3-thienyl, 2H-1,4-benzothiazin-3-yl, 2H-1,4-benzoxazin-3-yl, and 1,2-dihydro-3-quinoxalinyl groups at the 4-positions were prepared from 4-bromoacetyl-3-arylsydnones (1). Sydnone compounds substituted by a 1,2,3-triazol-4-yl group were prepared via new type phosphonium ylids derived from 1. Electroreduction of 1 was also
Synthesis and antimicrobial activities of a new series of 4-S-[41-amino-51-oxo-61-substituted benzyl-41,51-dihydro-11,21,41-triazin-3-yl]mercaptoacetyl-3-arylsydnones
作者:Jyothi C. Hegde、K.S. Girisha、Adithya Adhikari、Balakrishna Kalluraya
DOI:10.1016/j.ejmech.2008.02.003
日期:2008.12
The synthesis of some 4-S-(4(1)-amino-5(1)-oxo-6(1)-substituted benzyl-4(1),5(1)-dihydro-1(1),2(1),4(1)-triazin-3-yl)mercaptoacetyl-3-arylsydnone s by the reaction of 3-aryl-4-bromoacetylsydnones with 6-substituted-4-amino-3-mercapto-1,2,4-triazin-5-ones is described. The IR, (1)H NMR, mass spectra and elemental analysis characterized the newly synthesized compounds. The synthesized compounds were
Sydnone C-4 heteroarylation with an indolizine ring via Chichibabin indolizine synthesis
作者:Florin Albota、Mino R Caira、Constantin Draghici、Florea Dumitrascu、Denisa E Dumitrescu
DOI:10.3762/bjoc.12.245
日期:——
The synthesis of sydnones heteroarylated at C-4 with an indolizine was achieved by Chichibabin (Tschitschibabin) indolizine synthesis starting from the corresponding sydnone-N-pyridinium bromides. The latter compounds were also transformed to sydnone-indolizines connected through a keto group at the C-4 position by refluxing them in 1,2-epoxybutane with an activated alkyne. The structures of the new