Triethylamine → 2-Ethynyl-3'',4''-dimethoxy-biphenyl-4-carboxylic acid (1-methyl-4-pyridin-3-yl-butyl)-amide

HRID 2073300Notes

Reaction equation

HRID 2073300 reaction equation
[CH3:1][O:2][C:3]1[CH:4]=[C:5]([C:11]2[CH:16]=[CH:15][C:14]([C:17](O)=[O:18])=[CH:13][C:12]=2[C:20]#[CH:21])[CH:6]=[CH:7][C:8]=1[O:9][CH3:10].C(N(CC)CC)C.C1(P(N=[N+]=[N-])(C2C=CC=CC=2)=O)C=CC=CC=1.[CH3:46][C@@H:47]([NH2:57])[CH2:48][CH2:49][CH2:50][C:51]1[CH:52]=[N:53][CH:54]=[CH:55][CH:56]=1>CN(C)C=O.C(OCC)(=O)C>[C:20]([C:12]1[CH:13]=[C:14]([C:17]([NH:57][C@H:47]([CH3:46])[CH2:48][CH2:49][CH2:50][C:51]2[CH:52]=[N:53][CH:54]=[CH:55][CH:56]=2)=[O:18])[CH:15]=[CH:16][C:11]=1[C:5]1[CH:6]=[CH:7][C:8]([O:9][CH3:10])=[C:3]([O:2][CH3:1])[CH:4]=1)#[CH:21]

Participants

7

Reactant 4

HCID 8471TriethylamineHCID 199401P,P-Diphenylphosphinic azideHCID 11062727(R)-2-Amino-5-(3-pyridyl)pentaneHCID 145701343',4'-Dimethoxy-2-ethynyl[1,1'-biphenyl]-4-carboxylic acid

Product 1

HCID 145701032-Ethynyl-3'',4''-dimethoxy-biphenyl-4-carboxylic acid (1-methyl-4-pyridin-3-yl-butyl)-amide

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

A solution of 459 mg of 3',4'-dimethoxy-2-ethynyl[1,1'-biphenyl]-4-carboxylic acid in 8 mL of dimethylformamide was cooled in an ice bath and treated with 0.25 mL of triethylamine and 0.38 mL of diphenylphosphoryl azide. After 1 hour. 0.3 mL of (R)alpha-methyl-3-pyridinebutanamine was added and the reaction mixture was allowed to warm to room temperature over 48 hours. The reaction mixture was diluted with ethyl acetate, washed with water and brine, dried and concentrated. The residue was chromatographed over 50 g of silica gel eluting with ethyl acetate and the product was crystallized from ethyl acetate-hexane to give 576 mg of (R)-2-Ethynyl-3',4'-dimethoxy-N-[1-methyl-4-(3-pyridinyl)butyl][1.1'-biphenyl]-4-carboxamide, mp 135°-137° C.

Workup

  1. washwashed with water and brine
  2. customdried
  3. concentrationconcentrated
  4. customThe residue was chromatographed over 50 g of silica gel eluting with ethyl acetate
  5. customthe product was crystallized from ethyl acetate-hexane

Sources & evidence

ORD record
ord-ce066783a42247559d200bdd11fbcd1e
Source dataset
uspto-grants-1990_04
Patent number
US04916145

Reaction notes

Loading…