Diethylene Glycol Monomethyl Ether → Ethyl 2,5,8,11,14,17,20,23-octaoxanonacosan-29-oate

온도

0 °C

NaH (88 mg of a 60% dispersion in oil, 2.2 mmol) was suspended in anhydrous toluene (3 ml) under N2 and chilled to 0° C. Non-polydispersed diethylene glycol monomethyl ether (0.26 ml, 0.26 g, 2.2 mmol) that had been dried via azeotropic distillation with toluene was added. The reaction mixture was allowed to warm to room temperature and stirred for four hours, during which time the cloudy grey suspension became clear and yellow and then turned brown. Mesylate 20 (0.50 g, 1.0 mmol) in 2.5 ml dry toluene was added. After stirring at room temperature over night, the reaction was quenched by the addition of 2 ml of methanol and the resultant solution was filtered through silica gel. The filtrate was concentrated in vacuo and the FAB MS: m/e 499 (M+H), 521 (M+Na). Additional purification by preparatory chromatography (silica gel, 19/3 chloroform/methanol) provided the non-polydispersed product as a clear yellow oil (0.302 g 57%). FAB MS: m/e 527 (M+H), 549 (M+Na).

1. additionwas added
2. temperatureto warm to room temperature
3. stirringAfter stirring at room temperature over night
4. customthe reaction was quenched by the addition of 2 ml of methanol
5. filtrationthe resultant solution was filtered through silica gel
6. concentrationThe filtrate was concentrated in vacuo
7. customAdditional purification by preparatory chromatography (silica gel, 19/3 chloroform/methanol)

ORD 기록

ord-b91745a89bd4417cb01af8e321354d1d

출처 데이터셋

uspto-grants-2006_08

DOI

10.6084/m9.figshare.5104873.v1

특허 번호

US07084121B2