Triethylamine → alpha,epsilon-dicarbobenzoxy-L-lysyl-L-phenylalanine benzyl ester

HRID 354713Notes

Reaction equation

[C:1]([C@@:11]([C:28](O)=[O:29])([CH2:13][CH2:14][CH2:15][CH:16]([C:18]([O:20][CH2:21][C:22]1[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=1)=[O:19])[NH2:17])[NH2:12])([O:3][CH2:4][C:5]1[CH:10]=[CH:9][CH:8]=[CH:7][CH:6]=1)=[O:2].C(N(CC)CC)C.ClC(OCC(C)C)=O.[CH2:46]([O:53][C:54](=[O:64])[C@H:55]([CH2:57][C:58]1[CH:63]=[CH:62][CH:61]=[CH:60][CH:59]=1)[NH2:56])[C:47]1[CH:52]=[CH:51][CH:50]=[CH:49][CH:48]=1.C1(C)C=CC(S([O-])(=O)=O)=CC=1>C(Cl)(Cl)Cl.C1(C)C=CC=CC=1>[CH2:46]([O:53][C:54](=[O:64])[C@H:55]([CH2:57][C:58]1[CH:63]=[CH:62][CH:61]=[CH:60][CH:59]=1)[NH:56][C:28](=[O:29])[C@:11]([C:1]([O:3][CH2:4][C:5]1[CH:6]=[CH:7][CH:8]=[CH:9][CH:10]=1)=[O:2])([CH2:13][CH2:14][CH2:15][CH:16]([C:18]([O:20][CH2:21][C:22]1[CH:23]=[CH:24][CH:25]=[CH:26][CH:27]=1)=[O:19])[NH2:17])[NH2:12])[C:47]1[CH:48]=[CH:49][CH:50]=[CH:51][CH:52]=1

Participants

Conditions

Temperature: 0 °C

Procedure

To a stirred solution of α,ε-dicarbobenzoxy-L-lysine (4) (96 mmol, 39.69 g), toluene (310 ml) and triethylamine (96 mmol, 9.70 g) at 0° C., was added, over a period of 15 minutes, iso-butyl chloroformate (109 mmol, 14.88 g), maintaining the temperature between -5° and 0° C. The resulting jelly-like reaction mixture was stirred for 30 minutes at 0° C. and then a slurry of L-phenylalanine benzyl ester, p-toluene sulphonate (1) (96 mmol, 40.99 g) in chloroform (470 ml) and triethylamine (96 mmol, 9.70 g) was added quickly in one portion and the clear solution was allowed to stir at ambient temperature overnight.

Workup

customThe resulting jelly-like reaction mixture
stirringto stir at ambient temperature overnight

Sources & evidence

ORD record: ord-ac60421b493c45569276741815aa824e
Source dataset: uspto-grants-1983_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US04376766

Reaction notes

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