Acetic Anhydride → N-[4-(4-Piperidinomethyl-2-pyridyloxy)-cis-2-butenyl]-2-(2-acetoxyethylthio)acetamide

HRID 52048Notes

Reaction equation

[N:1]1([CH2:7][C:8]2[CH:13]=[CH:12][N:11]=[C:10]([O:14][CH2:15]/[CH:16]=[CH:17]\[CH2:18][NH:19][C:20](=[O:26])[CH2:21][S:22][CH2:23][CH2:24][OH:25])[CH:9]=2)[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1.[C:27](OC(=O)C)(=[O:29])[CH3:28].C(=O)([O-])O.[Na+]>N1C=CC=CC=1>[N:1]1([CH2:7][C:8]2[CH:13]=[CH:12][N:11]=[C:10]([O:14][CH2:15]/[CH:16]=[CH:17]\[CH2:18][NH:19][C:20](=[O:26])[CH2:21][S:22][CH2:23][CH2:24][O:25][C:27](=[O:29])[CH3:28])[CH:9]=2)[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1

Participants

Conditions

Temperature: 60 °C

Procedure

0.50 g of N-[4-(4-piperidinomethyl-2-pyridyloxy) -cis-2-butenyl]-2-(2-hydroxyethylthio)acetamide (prepared as described in Example 1) was added to a mixture of 0.47 ml of acetic anhydride and 0.39 g of pyridine, and the resulting mixture was heated at 60° C. for 2 hours. At the end of this time, the reaction mixture was poured into ice-water, after which a saturated aqueous solution of sodium hydrogencarbonate was added. The aqueous mixture was then extracted with chloroform. The extract was concentrated by evaporation under reduced pressure, and the residue was purified by column chromatography through silica gel, using a 1:19 by volume mixture of methanol and methylene chloride as the eluent, to give 0.51 g (yield 91%) of the title compound as an oil.

Workup

extractionThe aqueous mixture was then extracted with chloroform
concentrationThe extract was concentrated by evaporation under reduced pressure
customthe residue was purified by column chromatography through silica gel
additionby volume mixture of methanol and methylene chloride as the eluent

Sources & evidence

ORD record: ord-8a7136316b4a432ba23aeaecd9ca971c
Source dataset: uspto-grants-1997_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05616579

Reaction notes

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