- RECYCLING OF ORGANOTIN COMPOUNDS
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A method for the synthesis of a first organic molecule, said method comprising the steps of: a) Reacting a first reactant with an organotin reactant having at least one optionally substituted organic group having from 5 to 20 carbon atoms selected from alkyl, alkenyl, alkynyl, alkoxyalkyl, alkoxy, alkylthioalkyl, carboxylates and alkylaminoalkyl groups, thereby forming a mixture of a product and a tin-containing by-product, and b) Removing most of the tin-containing by-product from said mixture in such a way as to provide a purified product comprising less than 1000 ppm of remaining tin-containing by- product, wherein said step of removing most of said tin-containing by-product is either an extraction between a first liquid and a second liquid, said second liquid being more polar than said first liquid and at least partly immiscible therewith or is a reversed phase chromatography.
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Page/Page column 29; 36
(2013/12/03)
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- Recycling of organotin compounds
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A method for the synthesis of a first organic molecule, said method comprising the steps of: a) Reacting a first reactant with an organotin reactant having at least one organic group having from 5 to 20 carbon atoms selected from alkyl, alkoxyalkyl, alkoxy, alkylthioalkyl, carboxylates and alkylaminoalkyl groups, thereby forming a mixture of a product and a tin-containing by-product, and b) Removing most of the tin-containing by-product from said mixture in such a way as to provide a purified product comprising less than 1000 ppm of remaining tin-containing by-product, wherein said step of removing most of said tin-containing by-product is either an extraction between a first liquid being an alkane or a mixture of alkanes having from 5 to 17 carbon atoms and a second liquid more polar than said first liquid or is a reversed phase chromatography.
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Paragraph 0076
(2013/12/02)
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- HETEROGENEOUS ORGANOTIN CATALYSTS
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Supported heterogeneous organotin catalysts of the formula X1, X2, or X3: wherein Z is a spacer group; Y is an insoluble phenyl-group containing copolymer; R1, R2, R3, R5, and R6 are independently selected from halogen, alkyl, alkylene, phenyl, vinyl, allyl, naphthyl, aralkyl, and Z; and R4 is alkyl, alkylene, phenyl, vinyl, allyl, naphthyl, or aralkyl.
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Page/Page column 5
(2010/06/22)
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- Synthesis and characterization of lipophilic organotins. Application to the functionalization of silica gel
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The synthesis of the lipophilic docosyltri(hex-1-ynyl)tin was achieved in three steps according to two different synthetic pathways. This compound reacted with nonporous silica to yield surface-modified silica via the loss of the three alkynyl functionalities and the formation of Sibulk_O-Sn-C bonds. The reactivity and the maximum chain loading reached were compared to those obtained with the heptadecafluorodecyltin analogue. The differences observed were rationalized in terms of electronic demand and cross-sectional area of the grafted chain, as evidenced by FTIR spectroscopy and X-ray crystal structures of the precursors.
- Dumartin, Marie-Laurence,El Hamzaoui, Hicham,Jousseaume, Bernard,Rascle, Marie-Claude,Toupance, Thierry,Allouchi, Hassan
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p. 5576 - 5580
(2008/10/09)
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- A general route to alkylene-, arylene-, or benzylene-bridged ditin hexachlorides and hexaalkynides
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The preparation of alkylene-, arylene-, or benzylene-bridged ditin hexachlorides in high yields from the reaction of the corresponding hexacyclohexylated compounds with tin tetrachloride is described. The tetragonal geometry of the tin atom of 1,4-bis(trichlorostannyl)-butane in the solid state indicates that no intramolecular or intermolecular interaction involving either end of the molecule exists in this compound. The ditin hexachlorides were successfully transformed in the corresponding hexaalkynides, precursors of hybrid materials.
- Jousseaume, Bernard,Riague, Hocine,Toupance, Thierry,Lahcini, Mohamed,Mountford, Philip,Tyrrell, Ben R.
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p. 4590 - 4594
(2008/10/08)
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- Direct access to unsymmetrical tin hydrides through (hydridodiorganostannio)lithiums
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Metalation of diorganostannanes R12SnH2 by lithium diisopropylamide afforded the corresponding (hydridodiorganostannio)lithiums, R12SnHLi, which were stable at low temperature. Further reaction with alkyl halides led to functional unsymmetrically substituted alkyldiorganostannanes, R12R2SnH. Tin hydrides with an ω-unsaturated substituent were stable at room temperature. With a 4-pentyl chain, they underwent a specific cyclization process, giving a stannacyclohexane under radical reaction conditions. A tin hydride with a tin-silicon bond could also be prepared.
- Connil, Marie-Fran?oise,Jousseaume, Bernard,Pereyre, Michel
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p. 4469 - 4472
(2008/10/08)
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- Electrophilic cleavage of tin-alicyclic and tin-aryl bonds involving the synthesis of cyclohexyl-tin, -tellurium and -antimony compounds - Part I
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Cyclohexyl-tin, -tellurium and -antimony halides have been obtained in good yields by the electrophilic cleavage of Sn-C bond(s) from symmetrical and unsymmetrical cyclohexyl tins, CynPnPh4-n (n = 1, 2, 4) employing Br2, I2, ICl, IBr, TeCl4 and SbCl5 in CCl4 under mild conditions.
- Singhal, Kiran
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p. 542 - 544
(2007/10/02)
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- Process for preparing organotin compounds
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Tricycloalkyltin chlorides e.g. tricyclohexyltin chlorides, which may be converted to the fungicide tricyclohexyl hydroxide, are made by reacting an organic tricycloalkyltin, in which the organic is not cycloalkyl and cycloalkyl is optionally substituted cyclohexyl, with organic tin trihalide.
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