THE PREPARATION OF SULFUR-CONTAINING ORGANOSILICON COMPOUNDS

• Main Authors: DANE KENTON PARKER, MARK SAMUEL SINSKY
• Format: Patent
• Language: English; Spanish
• Published: 30.09.1997
• Edition: 6
• Subjects: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM; APPARATUS THEREFOR; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; GENERAL METHODS OF ORGANIC CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

The pesent invention relates to a process for the production of organosilicon compounds of the formula: Z.Alk-Sn-Alk-Z (I) in which Z is selected from the group consisting of (see formula) where R1 is an alkyl group of 1 to 4 carbon atoms, cyclohexyl or phenyl; R2 is alkoxy of 1 to 8 carbom atoms, or cycloalkoxy of 5 to 8 carbom atoms; Alk is a divalent hydrocarbon of 1 to 18; comprising reacting (A) a compound of the formula: Z-Alk-X (II) when X is Cl or Br; with (B) and ammonium hydrosulfide or alkali metal hydrosulfide and (C) sulfur; wherein the reaction is conducted in the presence of a phase transfer catalyst and an aqueous phase. La presente invencion se relaciona con un proceso para producir compuesto de organosilicio de la formula (I): Z-Alk-Sn-Alk-Z en donde Z se selecciona a partir del grupo que consiste de en donde R1 es un grupo alquilo de 1 a 4átomos de carbono, ciclohexilo o fenilo; R2 es un alcoxi de 1 a 8 átomos de carbono, cicloalcoxi de 5 a 8 átomos de carbono; Alk es un hidrocarburo divalente de 1 a 18 átomos de carbono y n es un entero de 2 a 8; que comprende hacer reaccionar (A) un compuesto de la formula Z-Alk-X (II) en donde X es Cl o Br; con (B) un hidrosulfuro de amonio o hidrosulfuro de metal alcalino y (C) azufre; en donde la reaccion se conduce en presencia de un catalizador de transferencia de fase y una fase acuosa.