Ammonia → HCID 178512860, compound

HRID 46538Notes

Reaction equation

HRID 46538 reaction equation
C([S:9][CH2:10][CH2:11][C:12]([NH:14][C@H:15]([C:23]([OH:25])=[O:24])[CH2:16][CH2:17][CH2:18][NH:19][C:20](=[NH:22])[NH2:21])=[O:13])(=O)C1C=CC=CC=1.N>O>[SH:9][CH2:10][CH2:11][C:12]([NH:14][C@H:15]([C:23]([OH:25])=[O:24])[CH2:16][CH2:17][CH2:18][NH:19][C:20](=[NH:21])[NH2:22])=[O:13]

Participants

4

Reactant 2

HCID 222AmmoniaHCID 178512859HCID 178512859, compound

Product 1

HCID 178512860HCID 178512860, compound

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

Nα -(3-benzoylthiopropanoyl)-L-arginine (1 g.) is dissolved with vigorous stirring in a mixture of water (5 ml.) and concentrated ammonia (5 ml.). After one hour, the solution is extracted with ethyl acetate and concentrated to dryness in vacuo. The residue is chromatographed on a column of DEAE Sephadex [anion exchange resin derived from dextran (Mikes, supra, page 328)] (85 ml.) with a buffer of 0.005 M ammonium bicarbonate. The fractions containing the Nα -(3-mercaptopropanoyl)-L-arginine (as indicated by positive thiol and Sakaguchi Reaction) are pooled and lyophilized to remove ammonium bicarbonate, yield 200 mg., m.p. 230° (starts decomposing at 200°).

Workup

  1. extractionthe solution is extracted with ethyl acetate
  2. concentrationconcentrated to dryness in vacuo
  3. customThe residue is chromatographed on a column of DEAE Sephadex [anion exchange resin derived from dextran (Mikes, supra, page 328)] (85 ml.) with a buffer of 0.005 M ammonium bicarbonate
  4. additionThe fractions containing the Nα -(3-mercaptopropanoyl)-L-arginine (as indicated by positive thiol and Sakaguchi Reaction)
  5. customto remove ammonium bicarbonate, yield 200 mg
  6. customm.p. 230° (starts decomposing at 200°)

Sources & evidence

ORD record
ord-a55a9cf73e0b49fe981615a73913a1ce
Source dataset
uspto-grants-1979_11
Patent number
US04173704

Reaction notes

Loading…