DL-beta-Phenylalanine → HCID 15435489, compound

HRID 1940074Notes

Reaction equation

HRID 1940074 reaction equation
[NH2:1][CH:2]([C:7]1[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=1)[CH2:3][C:4]([OH:6])=[O:5].[C@@H:13]12[C:22](=O)[O:21][C:19](=[O:20])[C@@H:14]1[CH2:15][CH2:16][CH2:17][CH2:18]2>C(O)(=O)C>[C:22]1(=[O:21])[N:1]([CH:2]([C:7]2[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=2)[CH2:3][C:4]([OH:6])=[O:5])[C:19](=[O:20])[C@H:14]2[CH2:15][CH2:16][CH2:17][CH2:18][C@@H:13]12

Participants

4

Reactant 2

HCID 69189DL-beta-PhenylalanineHCID 641660Hexahydrophthalic anhydride, cis-

Product 1

HCID 15435489HCID 15435489, compoundYield 58%

Reagents, catalysts & solvents 1

HCID 176Acetic AcidSolvent

Procedure

A stirred mixture 3-amino-3-phenylpropionic acid and cis-1,2-cyclohexanedicarboxylic anhydride in 10 mL of acetic acid under nitrogen was heated to reflux for 4 h and then allowed to cool to room temperature. The resulting mixture was concentrated to an orange yellow oil. This oil was crystallized from a 1/1 mixture of ethyl acetate/hexane to afford 1.77 g (58%) of 3-(cis-hexahydrophthalimido)-3-phenylpropionic acid as white crystals: 1H NMR (DMSO-d6) δ12.45 (br s, 1H, COOH), 7.33 (m, 5H, Ph), 5.48 (dd, 1H, J=6.3, 9.6, CH), 3.41 (dd, 1H, J=16.5, 9.6 Hz), 3.14 (dd, 1H, J=16.5, 6.3 Hz), 2.50 (m, 2H), 1.8-1.1 (m, 8H); 13C NMR (DMSO-d6) δ179.3, 179.2, 171.7, 138.7, 128.4, 127.5, 126.8, 50.1, 38.7, 38.6, 35.2, 23.0, 22.9, 21.1. Anal. Calcd for C17H19NO4. Theory: C, 67.76; H, 6.36; N, 4.65. Found: C, 67.52; H, 6.20; N, 4.60.

Workup

  1. temperatureto reflux for 4 h
  2. concentrationThe resulting mixture was concentrated to an orange yellow oil
  3. customThis oil was crystallized from a 1/1 mixture of ethyl acetate/hexane

Sources & evidence

ORD record
ord-3ded191e36064e0f8c27c83e8000ec31
Source dataset
uspto-grants-1997_12
Patent number
US05698579

Reaction notes

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