p-Toluenesulfonic acid → Boc-Gly-Phe-Gly-OBzl

HRID 2304453Notes

Reaction equation

C1(C)C=CC(S(O)(=O)=O)=CC=1.[NH2:12][C@H:13]([C:21]([NH:23][CH2:24][C:25]([O:27][CH2:28][C:29]1[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=1)=[O:26])=[O:22])[CH2:14][C:15]1[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1.[NH:35]([C:40]([O:42][C:43]([CH3:46])([CH3:45])[CH3:44])=[O:41])[CH2:36][C:37](O)=[O:38].ON1C(=O)CCC1=O.CN1CCOCC1.C1(N=C=NC2CCCCC2)CCCCC1>CN(C)C=O>[NH:35]([C:40]([O:42][C:43]([CH3:46])([CH3:45])[CH3:44])=[O:41])[CH2:36][C:37]([NH:12][C@H:13]([C:21]([NH:23][CH2:24][C:25]([O:27][CH2:28][C:29]1[CH:30]=[CH:31][CH:32]=[CH:33][CH:34]=1)=[O:26])=[O:22])[CH2:14][C:15]1[CH:16]=[CH:17][CH:18]=[CH:19][CH:20]=1)=[O:38]

Participants

Conditions

Temperature: 4 °C

Procedure

A mixture of p-toluenesulfonic acid salt of Phe-Gly-OBzl (3.06 g), Boc-Gly-OH (1.10 g), N-hydroxysuccinimide (941 mg), N-methylmorpholine (0.725 ml), and N,N-dimethylformamide (40 ml) was cooled to 4° C., and added with N,N′-dicyclohexyl-carbodiimide (1.56 g). The mixture was allowed to react overnight at room temperature with stirring, and then evaporated to dryness under reduced pressure. The residue was purified by silica gel column chromatography (eluent: dichloromethane:methanol=98:2 solution) to give Boc-Gly-Phe-Gly-OBzl (1.93 g).

Workup

customto react overnight at room temperature
customevaporated to dryness under reduced pressure
customThe residue was purified by silica gel column chromatography (eluent: dichloromethane:methanol=98:2 solution)

Sources & evidence

ORD record: ord-9651b7e65b204b679e604ec5e735b9b9
Source dataset: uspto-grants-2002_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06436912B1

Reaction notes

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