Ammonia → N4-(3,5,5-trimethyl-1-hexanoyl)-2'-deoxycytidine

Suspending 2′-Deoxycytidine (2.3 g, 10.0 mmol) in dry pyridine, followed by concentration under reduced pressure was repeated 3 times to perform dehydrative azeotropic distillation, the concentrate was suspended again in dry pyridine (60 ml), and trimethylsilyl chloride (6.4 ml, 50 mmol) was added dropwise over 5 min. To the reaction mixture was added 3,5,5-trimethyl-1-hexanoyl chloride (9.5 ml, 50.0 mmol) over 5 min. After completion of the reaction, under ice-cooling, aqueous ammonia (25 ml) was added and the mixture was reacted for 20 min. The reaction mixture was concentrated under reduced pressure. Water (150 ml) was added to the concentrate, and the mixture was extracted 3 times with ethyl acetate (100 ml). The organic layer was concentrated and the obtained oil was purified by silica gel column chromatography to give the title compound (4.7 g).

1. concentrationfollowed by concentration under reduced pressure
2. distillationazeotropic distillation
3. customAfter completion of the reaction
4. temperatureunder ice-cooling
5. customthe mixture was reacted for 20 min
6. concentrationThe reaction mixture was concentrated under reduced pressure
7. additionWater (150 ml) was added to the concentrate
8. extractionthe mixture was extracted 3 times with ethyl acetate (100 ml)
9. concentrationThe organic layer was concentrated
10. customthe obtained oil was purified by silica gel column chromatography

ORDレコード

ord-e1342269c6c64ced828ebd7673f082dc

出典データセット

uspto-grants-2014_09

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US08846885B2