| 摘要 |
1,136,038. Dioxaphosphorinane phosphite derivatives. PURE CHEMICALS Ltd. 5 Oct., 1966 [3 Dec., 1965], No. 44572/66. Heading C2C. [Also in Division C3] Novel phosphites have the general formulµ where R<SP>1</SP> and R<SP>2</SP> are alkyl, -OR<SP>3</SP>O- is the divalent residue of a member of the group consisting of D dihydric alcohols having at least 4 carbon atoms separating the hydroxyl groups and (2) dihydric phenols or bis-phenols, including hydrogenated and halogen or alkylsubstituted bis-phenols, having at least 4 carbon atoms and in some cases sulphurcontaining radicals separating the phenolic groups, R<SP>4</SP> and R 5 are alkyl, aryl or haloaryl, n is an integer of from 1 to 3 and x + y = 3-n. Compounds of the first general formula above are prepared by reacting a phosphite of formula P(OR<SP>4</SP>)(OR<SP>5</SP>)(OR<SP>6</SP>) with R<SP>1</SP>R<SP>2</SP>C(CH 2 OH) 2 and HOR<SP>3</SP>OH, and by reacting the product with additional phosphite in a second stage, compounds of the second general formula above are obtained. Alternatively, the compounds of the second formula may be obtained directly in a one-step reaction by reacting P(OR<SP>4</SP>)(OR<SP>5</SP>)(OR<SP>6</SP>) and HOR<SP>3</SP>OH with a heterocyclic phosphite of formula If excess phosphite of formula is used in the second stage of the 2-step reaction or in the one-step reaction, products of the third general formula above are obtained. The reactions are generally carried out in the presence of a dihydrocarbyl or dihaloaryl phosphite or an alkaline catalyst, The compounds are stabilizers for polymers.
|
