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

HRID 1759763Notes

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′-dicyclohexylcarbodiimide (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-eb6c174252504210838604370a08b4ac
Source dataset: uspto-grants-2005_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06838450B2

Reaction notes

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