نتایج جستجو برای: organotin

تعداد نتایج: 771  

Journal: :Journal of microbiology and biotechnology 2012
Eun-Min Cho Haeng-Seog Lee Jeong-Suk Moon Im-Soon Kim Sanghyo Sim Akinori Ohta

In aquatic invertebrates, particularly marine gastropods, organotin compounds induce irreversible sexual abnormality in females, which is termed imposex, at very low concentrations. Organotin compounds are agonists for nuclear receptors such as RXRs and PPARgamma. However, the imposex phenomenon has not been reported to act as an antagonist on estrogen receptors in other species, including vert...

Journal: :Molecules 2007
Ricardo L Guimarães Dimas J P Lima Maria Ester S B Barros Lívia N Cavalcanti Fernando Hallwass Marcelo Navarro Lothar W Bieber Ivani Malvestiti

The aqueous tin-mediated Barbier reaction affords good to excellent yields and moderate syn diastereoselectivity under basic and acidic conditions. The high yields and stereoselectivity observed in the case of o-substituted aldehydes suggest a cyclic organotin intermediate or transition state in K2HPO4 solution. A practical and efficient aqueous tin allylation of methoxy- and hydroxybenzaldehyd...

2009
Lichun Zhao Jian Liang Guihua Yue Xin Deng Ying He

Mol-ecules of the title compound, [Sn(2)(C(6)H(5))(6)(C(6)H(2)O(4)S)], lie on inversion centres with the central thio-phene ring disordered equally over two orientations. The carboxyl-ate groups are approximately coplanar with the thio-phene ring [dihedral angle = 4.0 (1)°] and the Sn-O bond distance of 2.058 (4) Å is comparable to that in related organotin carboxyl-ates.

Among the different reducing agents tributyltin hydride was found to be a powerful reducing agent for the denitration of a series of tertiary and secondary nitroesters. The organotin residues removed from the crude product using saturated potassium fluoride solution. The yield of the reactions was 62-98%.

Journal: :Chemical & pharmaceutical bulletin 2001
M M Mohamed M M Shoukry

The interaction of diphenyltin(IV) with selected bioligands having a variety of model functional groups were investigated using the potentiometric technique. The hydrolysis constants of diphenyltin(IV) cation and the step-wise formation constants of the complexes formed in solution were calculated using the non linear least-squares program MINIQUAD-75. The participation of different ligand func...

2015
Zenon Trela Zbigniew Burdach Agnieszka Siemieniuk Stanisław Przestalski Waldemar Karcz Zhong-Hua Chen

In the present study, patch-clamp techniques have been used to investigate the effect of trimethyltin chloride (Met3SnCl) on the slow vacuolar (SV) channels in vacuoles from red beet (Beta vulgaris L.) taproots. Activity of SV channels has been measured in whole-vacuole and cytosolic side-out patch configurations. It was found that addition of trimethyltin chloride to the bath solution suppress...

Journal: :journal of the iranian chemical research 0
uche b. eke department of chemistry, university of ilorin, pmb 1515, ilorin, nigeria temitope o. abodunrin department of chemistry, university of ilorin, pmb 1515, ilorin, nigeria samson o. owalude department of chemistry, university of ilorin, pmb 1515, ilorin, nigeria

the melt-phase synthesis of dioctyltin (iv) and triphenyltin (iv) benzoates were carried outusing stoichiometric amounts of benzoic acids and the corresponding organotin (iv) compounds.the reagents were ground together in a mortar and fed into a boiling glass tube. a cannula tubewas inserted into the boiling tube to discharge accumulated gaseous products. a syringe ensureda continuous flow of d...

Journal: :Chemical communications 2010
David C Harrowven Dennis P Curran Sarah L Kostiuk Ian L Wallis-Guy Sally Whiting Kerri J Stenning Bencan Tang Emma Packard Lana Nanson

Organotin impurities in product mixtures can be reduced from stoichiometric levels to approximately 15 parts per million by column chromatography using 10% w/w anhydrous potassium carbonate-silica as a stationary phase.

Journal: :Industrial health 1985
R S Dwivedi G Kaur R C Srivastava T N Srivastava

Effects of dioctyltin oxide (DOTO) tricyclohexyltin hydroxide (TCHTOH) and tributyltin oxide (TBTO) were examined on some enzymic activities in liver and kidney and biogenic amines level in brain of rats at 24 hours after single subcutaneous administration (25 ƒÊmole/100 g B. Wt.). All the organotin compounds produced a significant increase in the activity of alkaline phosphatase and adenosin t...

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