Acetic Acid → 5-(1-{4-[2-(tert-Butyl-dimethyl-silanyloxy)-3,3-dimethyl-butoxy]-3-methyl-phenyl}-1-ethyl-propyl)-3-methyl-thiophene-2-sulfonic acid acetyl-amide

HRID 1819949Notes

Reaction equation

HRID 1819949 reaction equation
[C:1]([Si:5]([CH3:37])([CH3:36])[O:6][CH:7]([C:32]([CH3:35])([CH3:34])[CH3:33])[CH2:8][O:9][C:10]1[CH:15]=[CH:14][C:13]([C:16]([C:21]2[S:25][C:24]([S:26]([NH2:29])(=[O:28])=[O:27])=[C:23]([CH3:30])[CH:22]=2)([CH2:19][CH3:20])[CH2:17][CH3:18])=[CH:12][C:11]=1[CH3:31])([CH3:4])([CH3:3])[CH3:2].CCN=C=NCCCN(C)C.[C:49](O)(=[O:51])[CH3:50]>CN(C1C=CN=CC=1)C.ClCCl>[C:49]([NH:29][S:26]([C:24]1[S:25][C:21]([C:16]([C:13]2[CH:14]=[CH:15][C:10]([O:9][CH2:8][CH:7]([O:6][Si:5]([C:1]([CH3:2])([CH3:3])[CH3:4])([CH3:36])[CH3:37])[C:32]([CH3:35])([CH3:34])[CH3:33])=[C:11]([CH3:31])[CH:12]=2)([CH2:17][CH3:18])[CH2:19][CH3:20])=[CH:22][C:23]=1[CH3:30])(=[O:28])=[O:27])(=[O:51])[CH3:50]

Participants

6

Reactant 3

HCID 176Acetic AcidHCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 578901405-(1-{4-[2-(tert-Butyl-dimethyl-silanyloxy)-3,3-dimethyl-butoxy]-3-methyl-phenyl)-1-ethyl-propyl)-3-methyl-thiophene-2-sulfonic acid amide

Product 1

HCID 578902375-(1-{4-[2-(tert-Butyl-dimethyl-silanyloxy)-3,3-dimethyl-butoxy]-3-methyl-phenyl}-1-ethyl-propyl)-3-methyl-thiophene-2-sulfonic acid acetyl-amideYield 98.4%

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6344DichloromethaneSolvent2×

Procedure

A mixture of 5-(1-{4-[2-(tert-Butyl-dimethyl-silanyloxy)-3,3-dimethyl-butoxy]-3-methyl-phenyl}-1-ethyl-propyl)-3-methyl-thiophene-2-sulfonic acid amide (227 mg, 0.4 mmol), EDCI (92 mg, 0.48 mmol), acetic acid (27 μL, 0.48 mmol) and DMAP (50 mg) in dichloromethane (10 ml) is stirred at RT overnight. The reaction is diluted with dichloromethane and washed with 1N HCl. The organic phase is concentrated and chromatographed (Hex to 20% EtOAc/Hex) to give the title compound (240 mg, 98%). 1H NMR (CDC3) δ 7.99 (s, 1H), 7.02 (d 1H, J=8.8 Hz), 6.96 (s, 1H), 6.69 (d, 1H, J=8.8 Hz), 6.59 (s, 1H), 3.98 (dd, 1H, J=3.4, 9.8 Hz), 3.85 (dd, 1H, J=5.8, 9.8 Hz), 3.67 (dd, 1H, J=3.4, 5.8 Hz), 2.43 (s, 3H), 2.20 (s, 3H), 2.13 9s, 3H), 2.06 (q, 4H), 0.96 (s, 9H), 0.89 (s, 9H), 0.70 (t, 6H), 0.11 (s, 3H), 0.05 (s, 3H);

Workup

  1. washwashed with 1N HCl
  2. concentrationThe organic phase is concentrated
  3. customchromatographed (Hex to 20% EtOAc/Hex)

Sources & evidence

ORD record
ord-04546fae9883444e96b752c055bb3713
Source dataset
uspto-grants-2009_10
Patent number
US07601850B2

Reaction notes

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