Triethylamine → HCID 21349576, compound

HRID 2211586Notes

Reaction equation

[CH2:1]([N:8]1[C:12](=[O:13])[CH2:11][CH2:10][C@H:9]1[C:14]([OH:16])=O)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[C:17]([O:21][C:22](=[O:33])[C@H:23]([CH2:25][C:26]1[CH:31]=[CH:30][C:29]([OH:32])=[CH:28][CH:27]=1)[NH2:24])([CH3:20])([CH3:19])[CH3:18].F[P-](F)(F)(F)(F)F.N1(O[P+](N(C)C)(N(C)C)N(C)C)C2C=CC=CC=2N=N1.C(N(CC)CC)C>CN(C=O)C.C(OCC)(=O)C>[C:17]([O:21][C:22](=[O:33])[C@H:23]([CH2:25][C:26]1[CH:31]=[CH:30][C:29]([OH:32])=[CH:28][CH:27]=1)[NH:24][C:14](=[O:16])[C@@H:9]1[CH2:10][CH2:11][C:12](=[O:13])[N:8]1[CH2:1][C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1)([CH3:20])([CH3:18])[CH3:19]

Participants

Conditions

Temperature: 25 °C

Procedure

A solution of N-benzyl-L-pyroglutamic acid (J. Am. Chem. Soc. 106:4539 (1984), 10.00 g, 45.62 mmol), L-tyrosine tert-butyl ester (11.91 g, 50.17 mmol) and BOP (22.19 g, 50.17 mmol) in DMF (250.0 mL) was charged to a 500 mL round bottom flask equipped with a stir bar and nitrogen inlet. Triethylamine (7.00 mL, 50.17 mmol) was added dropwise and the resulting solution was stirred at 25 ° C. for 16 h. The solution was transferred to a 1.0 L separatory funnel with ethyl acetate (300 mL) and washed with saturated sodium bicarbonate solution (300 mL×2), brine (300 mL×2), dried (MgSO4) and the solvent removed to give 18.63 g (93%) of N-(benzyl)-L-pyroglutamyl-L-tyrosine tert-butyl ester as a white solid.

Workup

customequipped with a stir bar and nitrogen inlet
washwashed with saturated sodium bicarbonate solution (300 mL×2), brine (300 mL×2)
dry with materialdried (MgSO4)
customthe solvent removed

Sources & evidence

ORD record: ord-3c5e251d97b9402ebac694572ae32671
Source dataset: uspto-grants-2006_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07101855B2

Reaction notes

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