Iodoethane → methyl (2S)-2-[ethyl-(4-fluorophenyl)sulfonyl-amino]-3-hydroxy-propanoate

HRID 1479799Notes

Reaction equation

[F:1][C:2]1[CH:7]=[CH:6][C:5]([S:8]([NH:11][C@@H:12]([CH2:17][OH:18])[C:13]([O:15][CH3:16])=[O:14])(=[O:10])=[O:9])=[CH:4][CH:3]=1.C([O-])([O-])=O.[K+].[K+].I[CH2:26][CH3:27]>CN(C=O)C>[CH2:26]([N:11]([S:8]([C:5]1[CH:4]=[CH:3][C:2]([F:1])=[CH:7][CH:6]=1)(=[O:9])=[O:10])[C@@H:12]([CH2:17][OH:18])[C:13]([O:15][CH3:16])=[O:14])[CH3:27]

Participants

Conditions

Temperature: 50 °C

Procedure

A solution of 2A (1 g, 3.6 mmol) in DMF (15 mL) was added with an. K2CO3 (1.4 mol eq, 0.7 g) and, after few minutes, 2-iodoethane (1.2 mol eq, 0.45 ml) was added and the mixture heated at 50° C. for 5 h. The solvent was removed under reduced pressure, water was added to the residue (80 mL) and the aqueous phase extracted with EtOAc (3×30 mL). The combined organic phases were dried using Na2SO4 and evaporated under reduced pressure to obtain 3B as a pale yellow oil (1.1 g, quantitative yield). 1HNMR (DMSO, 200 MHz) δ 1.13 (t, 3H, J=8), 3.29 (q, 2H), 3.41 (s, 3H), 3.79 (m, 2H), 4.53 (t, 1H), 5.14 (t, 1H), 7.41 (t, 2H, J=10), 7.86 (m, 2H).

Workup

customThe solvent was removed under reduced pressure, water
additionwas added to the residue (80 mL)
extractionthe aqueous phase extracted with EtOAc (3×30 mL)
customThe combined organic phases were dried
customevaporated under reduced pressure

Sources & evidence

ORD record: ord-eaec4d52ee1743718685663cc1a0d500
Source dataset: uspto-grants-2016_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09409864B2

Reaction notes

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