tert-Butanol → HCID 59607675, compound

HRID 1945061Notes

Reaction equation

HRID 1945061 reaction equation
[C:1]1([C:21]2[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=2)[CH:6]=[CH:5][C:4]([CH2:7][CH:8]([NH:13][C:14]([O:16][C:17]([CH3:20])([CH3:19])[CH3:18])=[O:15])[CH2:9][C:10]([OH:12])=[O:11])=[CH:3][CH:2]=1.[CH3:27][C:28](O)([CH3:30])[CH3:29].CCN=C=NCCCN(C)C.Cl>CN(C)C1C=CN=CC=1.C(Cl)Cl>[C:1]1([C:21]2[CH:22]=[CH:23][CH:24]=[CH:25][CH:26]=2)[CH:2]=[CH:3][C:4]([CH2:7][CH:8]([NH:13][C:14]([O:16][C:17]([CH3:20])([CH3:18])[CH3:19])=[O:15])[CH2:9][C:10]([O:12][C:28]([CH3:30])([CH3:29])[CH3:27])=[O:11])=[CH:5][CH:6]=1

Participants

6

Reactant 3

HCID 6386tert-ButanolHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 36392483-[(2-methylpropan-2-yl)oxycarbonylamino]-4-(4-phenylphenyl)butanoic Acid

Product 1

HCID 59607675HCID 59607675, compoundYield 38%

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6344DichloromethaneSolvent

Procedure

A solution of 4-(biphenyl-4-yl)-3-(tert-butoxycarbonylamino)butanoic acid (250 mg, 0.703 mmol), tBuOH (0.135 ml, 1.407 mmol), EDCl (270 mg, 1.407 mmol) and 4-dimethylaminopyridine (86.0 mg, 0.704 mmol) in DCM (7 ml) is allowed to stir at room temperature under nitrogen for 62 hours. The reaction is quenched with water, and the organic layer is separated and concentrated. The residue is purified by flash column chromatography on silica gel to give tert-butyl 4-(biphenyl-4-yl)-3-(tert-butoxycarbonylamino)butanoate (110 mg); HPLC retention time=1.77 minutes (condition B); MS (ES+)=412.1 (m+1) 300.0 (m-tBux2+3; 100%); 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.41 (s, 9H) 1.47 (s, 9H) 2.36 (A of ABX, Jab=15.5 Hz, Jax=6.2 Hz, 1H) 2.44 (B of ABX, Jab=15.5 Hz, Jbx=5.6 Hz) 2.82-2.94 (m, 2H) 4.11-4.17 (m, 1H) 5.08-5.10 (m, 1H) 7.25-7.34 (m, 3H) 7.41-7.44 (m, 2H) 7.51-7.58 (m, 4H).

Workup

  1. customThe reaction is quenched with water
  2. customthe organic layer is separated
  3. concentrationconcentrated
  4. customThe residue is purified by flash column chromatography on silica gel

Sources & evidence

ORD record
ord-2298cd23dc2644d1a3392e9811690bf5
Source dataset
uspto-grants-2013_03
Patent number
US08394853B2

Reaction notes

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