CAS: 5187-23-5; (5-Ethyl-1,3-Dioxan-5-yl)Methanol

相似化合物

3663-46-5 4728-12-5 1121-97-7

上下游产品

CAS号109-87-5 甲缩醛 | CAS号77-99-6 三羟甲基丙烷 | CAS号50-00-0 甲醛

📜二甲醇缩甲醛,三羟甲基丙烷置于对甲苯磺酸,Lithium Bromide体系中,用 二氯甲烷 作为反应溶剂,化学反应 0.42H,以88%的收率获得产物5-乙基-1,3-二噁烷-5-甲醇
参考文献:Transacetalisation De Triols A Partir Du Dimethoxymethane. Selectivite Et Applications Synthetiques
标题:Transacetalisation De Triols A Partir Du Dimethoxymethane. Selectivite Et Applications Synthetiques
摘要:
DOI:10.1016/s0040-4039(00)96924-7

专利信息

专利号:WO-9900440-A1
优先权日:1997-06-26
标 题:Synthesis of a dendritic polyalcohol
发明人：IHRE HENRIK; HULT ANDERS
权利人:PERSTORP AB; IHRE HENRIK; HULT ANDERS
摘要:A process for a double stage convergent synthesis of a polymeric polyalcohol substantially and preferably built up from polyester units and composed of a monomeric or polymeric core to which at least one hyperbranched dendritic branch (dendron) consisting of a number of branching generations is added. The branching generations comprise a polymeric or monomeric branching chain extender having three reactive functions of which two are hydroxyl groups and one is a carboxyl group. The two hydroxyl groups of the branching chain extender is in a first step ketal protected by reacting said two hydroxyl groups with a ketal. A second step includes protection of the carboxyl group of said branching chain extender. The ketal protected branching chain extender and the carboxyl protected chain extender are then employed for repeated addition in a number of step yielding a predetermined number of branching generations. The thus synthesized dendron is finally added to a core having reactive hydroxyl or epoxide groups and the ketal protected hydroxyl groups are optionally deprotected.

专利号:US-6586641-B2
优先权日:1999-12-28
标 题:Method for the decomposition of high boiling by-products produced in the synthesis of polyhydric alcohols
发明人：DERNBACH MATTHIAS; KRATZ DETLEF; STAMMER ACHIM; SCHULZ GERHARD
权利人:BASF AG
摘要:A process is provided for increasing the yield in the preparation of polyhydric alcohols obtained from methylolated alkanals by hydrogenation, wherein derivatives of these alcohols are decomposed by adding 5 ppm to 1% by weight, preferably 100 to 1000 ppm, of a suitable acid to an anhydrous mixture containing these derivatives, heating the mixture to temperatures of 100 to 300° C. and then separating off the polyhydric alcohol by distillation. This process makes it possible simply and efficiently to decompose compounds which boil above the polyhydric alcohol and are unwanted by-products of its synthesis.

专利号:US-6211329-B1
优先权日:1997-06-26
标题:Process for preparation of a dendritic polyol
发明人：REHNBERG NICOLA; PETTERSSON BO; ANNBY ULF; MALMBERG MATS
权利人:PERSTORP AB
摘要:A process for synthesis of a polymeric polyalcohol substantially and preferably built up form polyester units and composed of a monomeric or polymeric initiator molecule to which at least one dentritic branch (dendron) consisting of a number of branching generations is added. The branching generations comprise a polymericor monomeric branching chain extender having three reactive functions of which two are hydroxyl groups. The two hydroxyl groups of the ranching chain extender is acetal protected by reaction between said two hydroxyl groups and an acetal-forming carbonyl compound, preferably an aldehyde. The acetal protected branching chain extender is then employed for addition to the initiator molecule of a first branching generation followed by an optional deprotection of the hydroxyl groups by decomposition of acetals and for addition in repeated steps of further branching generations. Additions of branching generations individually employ an acetal protected branching chain extender synthesized from the same or a different branching chain extender and/or acetal-forming carbonyl compound and addition of a branching generation is optionally followed by addition of a spacing generation.

专利号:US-5004798-A
优先权日:1989-05-12
标 题:Novel polyacetal copolymers of trioxane and trimethylolpropane formal derivatives
发明人：BROUSSARD JERRY A; AUERBACH ANDREW B; YANG NAN L; PAUL JAMES L; ZHENG YONG C; ZHANG CHONG L
权利人:HOECHST CELANESE CORP
摘要:Cationic copolymerization of trioxane and trimethylolpropane (TMP) formal or its ester derivatives yields acetal copolymers having pendant functional groups. The TMP formal or ester derivatives of TMP formal may therefore include functional groups selected from hydroxyl or ester moieties which are protected and thus survive the copolymerization with trioxane. These groups may then be present as functional reactive sites for the subsequent synthesis of block copolymers and/or to chemically bind modifiers to the acetal copolymer backbone, for example.

专利号:US-2003088131-A1
优先权日:1999-12-28
标 题 :Method for the decomposition of high boiling by-products produced in the synthesis of polyhydric alcohols