نتایج جستجو برای: indene 2 3 pyrrolizidine

تعداد نتایج: 3350140  

2010
Tracey A. Oudenhoven Brennan J. Walder James A. Golen Arnold L. Rheingold Jason S. D’Acchioli

In the title mol-ecule, [Ru(C(9)H(7))(C(7)H(5)O)(CO)(2)], the dihedral angle between the mean plane of the indene ring system and the phenyl ring is 86.28 (8)°. The crystal structure is stabilized by weak inter-molecular C-H⋯O and C-H⋯π(arene) inter-actions. The Ru-η(5)-cyclopentadienyl centroid bond length is 1.946 (11) Å

Journal: :journal of sciences islamic republic of iran 0

a series of amino derivative of 1-indene and 9-fluorene have been synthesized from their corresponding iminium salt, generated in situ in the concentrated ethereal lithium perchlorate solution, and 1-indenyl or 9-fluorenyl anions. the yields of the reactions depend on the kind of anion. addition of 1-indeny anion to the iminium salt gives the amino derivative of 1-indene, while addition of fluo...

2013
Piskala Subburaman Kannan Srinu Lanka Sathiah Thennarasu Gopal Vimala Arunachalathevar SubbiahPandi

In the title compound, C38H32N4O3·H2O, the quinoxaline-indene and pyrrolizine systems are essentially planar, with maximum deviations from their mean planes of 0.162 and 0.563 Å, respectively. The pyrrolizine ring forms dihedral angles of 88.53 (5) and 89.95 (8)° with the quinoxaline-indene system and the indoline ring, respectively. The central pyrrolidine ring has an envelope conformation wit...

Journal: :The Journal of antibiotics 1987
R Misra R C Pandey B D Hilton P P Roller J V Silverton

IR, UV-visible spectroscopy, circular dichroism, 1H and 13C NMR studies, high resolution electron impact, field desorption, and fast atom bombardment mass spectral studies are reported for fredericamycin A (NSC-305263), a novel antitumor antibiotic of acid-base indicator type produced by Streptomyces griseus (FCRC-48). The spectral data are correlated with the structure obtained by X-ray crysta...

Journal: :Journal of Insect Science 2003
Jason W. Davenport William E. Conner

Male salt marsh moths, Estigmene acrea (Lepidoptera: Arctiidae), possess inflatable androconial organs called coremata. Prior to mating males form aggregations and inflate their coremata en masse. The communal display attracts additional males and females for the purpose of mating. The coremata are known to carry the plant-derived dihydropyrrolizine, hydroxydanaidal. This pheromonal substance i...

Journal: :Journal of animal science 1976
L R Shull G W Buckmaster P R Cheeke

The effect of a single (% LDs0) dose (65 mg/kg body weight) of pyrrolizidine alkaloid isolated from Senecio jacobaea on liver microsome mixed function oxidase activity in rats was studied. Within 1 hr of dosing, there was a decline (P<.05) in the pyrrole production rate in vitro from pyrrolizidine alkaloid. At 24 hr, there was reduced (P<.01) activity of aminopyrine N-demethylase, and cytochrom...

2015
Sharma S

Pyrolizidine alkaloids are toxic for human and livestock. Various reports have been investigated the PA’s intoxication in human as well as animals. Plants containing hepatotoxic PAs are present in most parts of the world and often cause poisoning in cattles and also in human. Several traditional popular medicines of India have been reported for successful treatment of various diseases. Among th...

Elham Davoodi, Hamideh Hosseinjani-Pirdehi Leila Youseftabar-Miri

An efficient and direct procedure for the synthesis of benzo[h]-indeno[1,2-b]-quinoline derivatives has been described. The procedure employs a three-component condensation reaction in one-pot using 2H-indene-1, 3-dione, naphthalen-1-amine,and aldehydes in the presence of catalytic amount of L-prolinein aqueous media.

2015
Peng Fu John B. MacMillan

Spithioneines A and B (1 and 2), two new bohemamine-type pyrrolizidine alkaloids possessing an unusual ergothioneine moiety, were isolated from a marine-derived Streptomyces spinoverrucosus. Their structures were elucidated by spectroscopic analysis, CD spectra, and chemical degradation and synthesis. Compounds 1 and 2 are rare natural products that incorporate the amino acid ergothioneine.

Journal: :Bioorganic & medicinal chemistry letters 2004
Daniel P Becker Daniel L Flynn Clara I Villamil

Pyrrolizidine benzamide (+/-)-2, the bridgehead-methyl analog of SC-53116, was prepared and evaluated for 5-HT(4) agonism activity in the rat tunica muscularis (TMM) mucosae assay. Compound (+/-)-2 has an EC(50) of 449 nM in the TMM assay, as compared to 23 nM for SC-53116, and 66 nM for the racemate of SC-53116.

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