Isobutyl chloroformate → BocDPro-Phe-PheOMe

HRID 2418560Notes

Reaction equation

HRID 2418560 reaction equation
[N:1]1([C:9]([O:11][C:12]([CH3:15])([CH3:14])[CH3:13])=[O:10])[CH2:8][CH2:7][CH2:6][C@@H:2]1[C:3]([OH:5])=O.[NH2:16][C@H:17]([C:26]([NH:28][C@H:29]([C:37]([O:39][CH3:40])=[O:38])[CH2:30][C:31]1[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=1)=[O:27])[CH2:18][CH2:19][C:20]1[CH:25]=[CH:24][CH:23]=[CH:22]C=1.ClC(OCC(C)C)=O>>[N:1]1([C:9]([O:11][C:12]([CH3:15])([CH3:14])[CH3:13])=[O:10])[CH2:8][CH2:7][CH2:6][C@@H:2]1[C:3]([NH:16][C@H:17]([C:26]([NH:28][C@H:29]([C:37]([O:39][CH3:40])=[O:38])[CH2:30][C:31]1[CH:32]=[CH:33][CH:34]=[CH:35][CH:36]=1)=[O:27])[CH2:18][C:19]1[CH:20]=[CH:25][CH:24]=[CH:23][CH:22]=1)=[O:5]

Participants

4

Reactant 3

HCID 62365Isobutyl chloroformateHCID 688022(2R)-1-[(tert-butoxy)carbonyl]pyrrolidine-2-carboxylic acidHCID 131713693HCID 131713693, compound

Product 1

HCID 131713731BocDPro-Phe-PheOMeYield 75%

Procedure

Condensation of BocDProOH (1.51 g.) and HPhe-PheOMe (2.53 g.) by the mixed anhydride method using isobutyl chloroformate gave BocDPro-Phe-PheOMe in 75% yield. Hydrazinolysis of BocDPro-Phe-PheOMe (2.00 g.) gave BocDPro-Phe-PheNHNH2 in 79% yield.

Sources & evidence

ORD record
ord-1a3fc259c30e458f9486906fdf384d53
Source dataset
uspto-grants-1984_09
Patent number
US04472305

Reaction notes

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