Hydrochloric Acid → 5-(3,3-Dimethyl-but-1-ynyl)-3-[[2-(ethoxy-methyl-phosphinoyl)-ethyl]-(4-methyl-cyclohexanecarbonyl)-amino]-thiophene-2-carboxylic acid

HRID 1614915Notes

Reaction equation

HRID 1614915 reaction equation
C[O:2][C:3]([C:5]1[S:6][C:7]([C:28]#[C:29][C:30]([CH3:33])([CH3:32])[CH3:31])=[CH:8][C:9]=1[N:10]([CH2:20][CH2:21][P:22]([O:25][CH2:26][CH3:27])([CH3:24])=[O:23])[C:11]([CH:13]1[CH2:18][CH2:17][CH:16]([CH3:19])[CH2:15][CH2:14]1)=[O:12])=[O:4].[Li+].[OH-].O.Cl>C1COCC1.CO>[CH3:32][C:30]([CH3:31])([CH3:33])[C:29]#[C:28][C:7]1[S:6][C:5]([C:3]([OH:4])=[O:2])=[C:9]([N:10]([CH2:20][CH2:21][P:22]([O:25][CH2:26][CH3:27])([CH3:24])=[O:23])[C:11]([CH:13]2[CH2:14][CH2:15][CH:16]([CH3:19])[CH2:17][CH2:18]2)=[O:12])[CH:8]=1

Participants

7

Reactant 4

HCID 313Hydrochloric AcidHCID 962WaterHCID 3939Lithium HydroxideHCID 670337505-(3,3-Dimethyl-but-1-ynyl)-3-[[2-(ethoxy-methyl-phosphinoyl)-ethyl]-(4-methyl-cyclohexanecarbonyl)-amino]-thiophene-2-carboxylic acid methyl ester

Product 1

HCID 670359145-(3,3-Dimethyl-but-1-ynyl)-3-[[2-(ethoxy-methyl-phosphinoyl)-ethyl]-(4-methyl-cyclohexanecarbonyl)-amino]-thiophene-2-carboxylic acidYield 69%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 8028TetrahydrofuranSolvent

Procedure

5-(3,3-Dimethyl-but-1-ynyl)-3-[[2-(ethoxy-methyl-phosphinoyl)-ethyl]-(4-methyl-cyclohexanecarbonyl)-amino]-thiophene-2-carboxylic acid methyl ester (251 mg, 0.51 mmol) was dissolved in THF (7.3 mL) and MeOH (7.3 mL). A 1N solution of LiOH in H2O (1.52 mL, 1.52 mmol) was added to the reaction drop-wise at room temperature. The reaction was run at room temperature until complete, as determined by LC/MS. The reaction was cooled in an ice bath and then acidified to pH 3 with 1N HCl. The entire mixture was then evaporated in vacuo and stored under high vacuum overnight. 5-(3,3-Dimethyl-but-1-ynyl)-3-[[2-(ethoxy-methyl-phosphinoyl)-ethyl]-(4-methyl-cyclohexanecarbonyl)-amino]-thiophene-2-carboxylic acid (168 mg, 69%) was isolated from the residue by reverse phase HPLC. MS (m/z): 481.93 [M+H]+; 31P NMR (161.9 MHz, CDCl3): d 56.771, 55.816.

Workup

  1. customwas run at room temperature
  2. temperatureThe reaction was cooled in an ice bath
  3. customThe entire mixture was then evaporated in vacuo
  4. customstored under high vacuum overnight

Sources & evidence

ORD record
ord-9e6d6ee67b034b9e9911a884880d5e6a
Source dataset
uspto-grants-2014_07
Patent number
US08765722B2

Reaction notes

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