Organotin
Mostrando 1-12 de 40 artigos, teses e dissertações.
-
1. Synthesis, Hypoglycemic Effect, Antimicrobial and Molecular Docking Studies of Organotin(IV) Complexes Derived From N-Phthalimido β-Amino Acid Derivatives
N-Phthalimido β-amino acid derivatives, 3-phthalimido-3(2-hydroxyphenyl) propanoic acid (P2HPA) and 3-phthalimido-3(2-nitrophenyl) propanoic acid (P2NPA) with new series of di- and triorganotin(IV) complexes (1-12) have been designed and synthesized. All the ligands and organotin(IV) complexes were characterized by elemental analysis, Fourier transform infr
J. Braz. Chem. Soc.. Publicado em: 2021-05
-
2. Different Strategies to Anchor Organotin Methoxides on Silica and Their (Re)Use as Heterogeneous Catalysts for Transesterification Reactions
Catalysts were prepared by the heterogenization of the tributyltin(IV) methoxide (n-Bu3Sn(OMe)) and dibutyltin(IV) dimethoxide (n-Bu2Sn(OMe)2) on silica by two strategies: (i) anchoring of the organotin(IV) compounds on silica and (ii) anchoring of the organotin(IV) compounds on a silica gel functionalized with mercaptopropyl groups (SiO2–SH). The characte
J. Braz. Chem. Soc.. Publicado em: 16/09/2019
-
3. PHNSNCL4-N SUPPORTED ON ACTIVATED CARBON AS NOVEL TIN-BASED CATALYSTS FOR ACETYLENE HYDROCHLORINATION
In this work, a series of PhnSnCl4-n (n = 1, 2, 3, and 4) based catalysts were prepared by incipient wetness impregnation using activated carbon (AC) as support and triphenyltin chloride (Ph3ClSn) and tin(IV) chloride (SnCl4) as Sn precursors. The obtained catalysts were systematically characterized by X-ray diffraction (XRD), N2 physisorption, Scanning elec
Quím. Nova. Publicado em: 26/08/2019
-
4. SÍNTESE E CARACTERIZAÇÃO DE NOVOS ORGANOMETÁLICOS DE ESTANHO (IV) COM LIGANTES DITIOCARBIMATOS E SUA AÇÃO ACCELERADORA NA VULCANIZAÇÃO DE BORRACHA NITRÍLICA
This paper describes the synthesis of four new organotin compounds of general formula: (Ph4P)[Sn(Cy)3(RSO2N=CS2)] [Ph4P = tetraphenylphosphonium cation, Cy = cyclohexyl, R = C6H5 (1), 4-ClC6H4 (2), 4-BrC6H4 (3) and 4-IC6H4 (4)]. They were obtained by the reaction between four different potassium N-R-sulfonyldithiocarbimate salts and tricyclohexyltin chloride
Quím. Nova. Publicado em: 2016-08
-
5. Synthesis of Organotin Substituted Tricyclic Macrodiolides
The radical addition of triorganotin hydrides, R3SnH (R =n-butyl, phenyl, neophyltin), to four unsaturated diesters of (11R,12R)-9,10-dihydro-9,10-ethaneanthracene-11,12-dimethanol leads to products of cyclohydrostannation with an average yield of around 80%. Whereas the addition of these hydrides to diacrylate and dimethacrylate leads to the expected mixtur
J. Braz. Chem. Soc.. Publicado em: 2016-03
-
6. SYNTHESIS AND BIOLOGICAL ACTIVITY OF NEW SERIES OF ORGANOTIN(IV) ESTERS WITH N,N-DIACETYLGLYCINE
A bioactive N,N-diacetylglycine (NNDAG) and new organotin(IV) complexes (OTCs) (1-7) were synthesized. Spectroscopic techniques were employed to characterize NNDAG and OTCs. FTIR was employed to verify N,N protection of glycine by acetyl groups. The disappearance of υ(OH) at 3000-2600 cm-1 showed de-protonation of free ligand. The Δυ 150<200 cm-1 of OTCs
Quím. Nova. Publicado em: 2016-01
-
7. Organotin pollution from pleasure craft at Paraty, a tourist area of Southeastern Brazil: amelioration or interference?
Alguns compostos organoestânicos, como o TBT, são desreguladores endócrinos e causam danos aos ecossistemas marinhos. Mesmo após a proibição global de organoestânicos, níveis crescentes de imposex foram detectados em indivíduos Stramonita haemastoma analisados em 2004 e 2011, em Paraty, área turística no sudeste do Brasil. Os resultados deste estu
Braz. j. oceanogr.. Publicado em: 2013-09
-
8. Avaliação temporal da poluição por antiincrustantes organoestânicos no litoral do Estado do Rio de Janeiro: antes e após o banimento nacional e internacional / Temporal assessment of pollution from antifouling of organotin on the coast of the Rio de Janeiro State: before and after the nationally and internationally ban
Tintas antifoulings são utilizadas para evitar a incrustação de organismos em estruturas submersas, especialmente casco de embarcações. Os compostos organoestânicos (OTs), utilizados nessas tintas, entre eles o tributilestanho, são desreguladores endócrinos e causaram diversos danos aos ecossistemas marinhos. No caso dos moluscos gastrópodes, esse t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/04/2012
-
9. Potencial de utilização de anfípodes caprelídeos (Crustacea - Peracarida) como bioindicadores de compostos organoestânicos no litoral norte de São Paulo
Os anfípodes caprelídeos são pequenos crustáceos, geralmente com 0,1 a 3 cm de comprimento, pertencentes à subordem Caprellidea. Os caprelídeos possuem uma importante função ecológica, pois além de servirem de elo de conexão entre os produtores primários e os níveis tróficos mais altos, eles são sensíveis a variações ambientais, toxinas e p
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/02/2011
-
10. Triorganotin as a compound with potential reproductive toxicity in mammals
Organotin compounds are typical environmental contaminants and suspected endocrine-disrupting substances, which cause irreversible sexual abnormality in female mollusks, called "imposex". However, little is known about the capability of triorganotin compounds, such as tributyltin and triphenyltin, to cause disorders in the sexual development and reproductive
Brazilian Journal of Medical and Biological Research. Publicado em: 2011-09
-
11. Organotin pollution at Arraial do Cabo, Rio de Janeiro State, Brazil: increasing levels after the TBT ban
O imposex, um fenômeno de desregulação endócrina, é um biomarcador da exposição ao tributilestanho (TBT) em populações de gastrópodes marinhos. A ocorrência e intensidade dessa síndrome nas populações do neogastrópode Stramonita haemastoma foram verificadas em nove estações amostrais em outubro de 2008 em Arraial do Cabo, uma área de grande
Brazilian Journal of Oceanography. Publicado em: 2011-03
-
12. Organotin(IV) complexes with 2-acetylpyridine benzoyl hydrazones: antimicrobial activity
Reações de tricloreto de n-butilestanho, [Bu nSnCl3], e tricloreto de fenilestanho, [PhSnCl3], com 2-acetilpiridina benzoil hidrazona (H2AcPh), 2-acetilpiridina-para-cloro-benzoil hidrazona (H2AcpClPh) e 2-acetilpiridina-para-nitro benzoil hidrazona (H2AcpNO2Ph) produziram os complexos [Bu nSn(2AcPh)Cl2] (1), [Bu nSn(2AcpClPh)Cl2] (2), [Bu nSn(2AcpNO2Ph)Cl
Journal of the Brazilian Chemical Society. Publicado em: 2010