Oxetane, 3,3-bis(chloromethyl)- → 3,3-Bis(methoxyethoxymethyl)oxetane

To a 5 liter, three-neck flask, fitted with a reflux condenser, a stirrer and a thermometer, were added 1824 g (24 mole) of 2-methoxyethanol followed by 139 g (6 mole) of sodium metal. The flask temperature was then raised to mild reflux and thus maintained until all the sodium had dissolved. At this time, 465 g (3 mole) of 3,3-bis(chloromethyl)oxetane was added and heating was maintained for a further 24 hr. The mixture was then cooled to room temperature and the precipitated sodium chloride was removed by filtration. The filtrate was dissolved in an excess offwater, extracted with four portions of 500 ml methylene chloride, and then the combined organic layers were dried over magnesium sulfate. The solvent was then removed by evaporation and the required monomer isolated by fractional distillation, the fraction boiling at 85° C. and 0.1-mm pressure being collected. Redistillation from calcium hydride yielded 487 g of polymerizable grade monomer.

1. customTo a 5 liter, three-neck flask, fitted with a reflux condenser, a stirrer
2. temperatureThe flask temperature was then raised
3. temperatureto mild reflux
4. dissolutionhad dissolved
5. temperatureheating
6. temperaturewas maintained for a further 24 hr
7. customthe precipitated sodium chloride was removed by filtration
8. dissolutionThe filtrate was dissolved in an excess offwater
9. extractionextracted with four portions of 500 ml methylene chloride
10. dry with materialthe combined organic layers were dried over magnesium sulfate
11. customThe solvent was then removed by evaporation

ORD 기록

ord-c615442d2971410a8ae89a631986ee37

출처 데이터셋

uspto-grants-1989_02

DOI

10.6084/m9.figshare.5104873.v1

특허 번호

US04806613