1,3-Dipolar cycloaddition reaction of bipyridinium ylides with the propynamido-β-cyclodextrin. A regiospecific synthesis of a new class of fluorescent β-cyclodextrins
The 1,3-dipolarcycloadditionreaction of bipyridinium ylides with the electron deficient propynamido-β-cyclodextrin was studied. This reaction resulted in the regiospecific formation of a new class of fluorescent β-cyclodextrins. The new fluorophore systems were characterized spectroscopically by their absorption and emission maxima and their quantum yields.
1-(4-Nitrophenoxycarbonyl)-7-pyridin-4-yl indolizine: a new versatile fluorescent building block. Application to the synthesis of a series of fluorescent β-cyclodextrins
The synthesis of a series of new fluorescentbuildingblocks 1a–d incorporating a pyridinoindolizine unit and two potentially reactive sites is described. The reaction of 1a–d with the mono-6-amino-6-deoxy-β-cyclodextrin provides the corresponding fluorescent water soluble hosts 2a–d in good yield. The sensor properties of 2a–d in the presence of 1-adamantanol is described.
Synthesis of new non-symmetrical substituted 7,7′-bisindolizines by the direct reaction of 4,4′-bipyridinium-ylides with dimethyl acetylenedicarboxylate
作者:Alexandru V. Rotaru、Ramona P. Danac、Ioan D. Druta
DOI:10.1002/jhet.5570410608
日期:2004.11
We report here on the synthesis of some novel non-symmetrical substituted bisindolizines by 3+2 dipolar cycloaddition reaction. New compounds were prepared by the direct reaction of isolated non-symmetrical substituted 4,4′-bipyridinium bisylides with dimethyl acetylenedicarboxy late (DMAD). The obtained compounds can be used as precursors of fluorescent markers in fluorometric analysis.
Antimycobacterial activity of nitrogen heterocycles derivatives: 7-(pyridine-4-yl)-indolizine derivatives. Part VII<sup>8–12</sup>
作者:Anda-Mihaela Olaru、Violeta Vasilache、Ramona Danac、Ionel I. Mangalagiu
DOI:10.1080/14756366.2017.1375483
日期:2017.1.1
A series of 13 compounds having a monoindolizine mono-salt skeleton was designed and synthesised in order to evaluate their antimycobacterial activity. The synthesis is efficient, involving only three steps: two alkylations and one 3 + 2 dipolar cycloaddition. The antimicrobial activity against Mycobacterium tuberculosis H37Rv grown under aerobic conditions was evaluated, eight compounds showing a
Antimycobacterial activity of nitrogen heterocycles derivatives: Bipyridine derivatives. Part III [13,14]
作者:Ramona Danac、Ionel I. Mangalagiu
DOI:10.1016/j.ejmech.2013.09.061
日期:2014.3
Three classes of fused bipyridine heterocycles were designed, synthesized and evaluated for their antimycobacterial activities. The method for preparation of fused bipyridine derivatives is straight and efficient. The primary antimycobacterial screening reveals that mono-indolizine mono-salts are displaying potency superior to the second-line antitubercular drugs Cycloserine and Pyrimethamine and,