http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-971569-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2dbb2d7ecbd600cf89fbdd230f4a466c |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F7-083 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F7-08 |
| filingDate | 1962-07-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1964-09-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-971569-A |
| titleOfInvention | Improvements in or relating to organosilanes and their preparation |
| abstract | Organosilane ethers of general formula (R)nSi(CH2-O-R1)4- n wherein n is 1, 2 or 3 R is hydrogen, alkyl, cycloalkyl, aryl or aralkyl and R1 is alkyl, cycloalkyl, aryl or aralkyl, are prepared by reacting in organohalosilane (R)nSi(X)4- n where X is halogen, with a chloromethyl ether ClCH2-O-R1 and magnesium in, as reaction medium, tetrahydrofuran or tetrahydropyran or homologues thereof and subsequently hydrolysing the product of the reaction. The magnesium is preferably activated by partial amalgamation with mercury, e.g. by treatment with mercuric chloride. Preferably R and R1 are alkyl having 1 to 4 carbon atoms, cyclopentyl, methylcyclopentyl, cyclohexyl, methylcyclohexyl, phenyl, lower alkyl phenyl and benzyl. In practice, in portion of the chloromethyl ether is added to a solution of magnesium in the solvent medium and when reaction has begun, excess chloromethyl ether and the organohalosilane are then added keeping the temperature at 15 DEG to 25 DEG C. The reaction product is then hydrolysed by water, dilute mineral acid or ammonium salt solution and subsequently isolated. Organosilane ethers thus prepared may be converted to the corresponding chloromethylorganosilane by reaction with acetyl chloride and zinc chloride and then converted by known methods into alcohols of the type RnSi(CH2OH)4- n. The examples describe (1) reaction of chloromethoxyethane and dimethyldichlorosilane in tetrahydrofuran in presence of magnesium activated with mercuric chloride to produce bis (ethoxymethyl) dimethylsilane which is converted to bis (chloromethyl) dimethylsilane by acetyl chloride and zinc chloride; (2) preparation of bis (ethoxymethyl) methyl propysilane and the conversion to the bis (chloromethyl) methyl propyl silane which is reacted with potassium acetate and acetic acid to form bis (acetoxymethyl) methyl propyl silane which on alcoholysis with methanol and trace hydrochloric acid gives bis (hydroxymethyl) methyl propyl silane. Other examples given are the reactions of methyltrichlorosilane and chloromethoxyethane to produce tri (ethoxymethyl) methyl silane; (4) chloromethoxyethane and diphenyldichlorosilane to produce bis (ethoxymethyl) diphenylsilane; (5) benzyloxymethylchloride and diphenyldichlorosilane to produce bis (benzyloxymethyl) diphenylsilane; (6) ethoxymethyl chloride and n-propyltrichlorosilane to produce tris (ethonylmethyl) n-propylsilane; (7) ethoxymethylchloride and methyldichlorosilane to produce bis (ethoxymethyl) methylsilane; (8) methoxymethylchloride and dimethylbenzylchlorosilane to produce (ethoxymethyl)-dimethyl benzylsilane and (9) ethoxymethylchloride and cyclohexyltrichlorosilane to produce tris (ethoxymethyl) cyclohexylsilane. Specification 657,443 is referred to. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2012140700-A |
| priorityDate | 1961-07-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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