Dicyclohexylcarbodiimide → N,N'-Dicyclohexylurea

HRID 651961Notes

Reaction equation

HRID 651961 reaction equation
[OH:1]N1C(=O)CCC1=O.[CH:9]1([N:15]=[C:16]=[N:17][CH:18]2[CH2:23][CH2:22][CH2:21][CH2:20][CH2:19]2)[CH2:14][CH2:13][CH2:12][CH2:11][CH2:10]1>CN(C)C=O>[CH:18]1([NH:17][C:16](=[O:1])[NH:15][CH:9]2[CH2:10][CH2:11][CH2:12][CH2:13][CH2:14]2)[CH2:23][CH2:22][CH2:21][CH2:20][CH2:19]1

Participants

4

Reactant 2

HCID 10868DicyclohexylcarbodiimideHCID 80170N-Hydroxysuccinimide

Product 1

HCID 4277N,N'-Dicyclohexylurea

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

α-Carboxymethoxy, ω-carboxymethyl polyoxyethylene (molecular weight about 4000) (20 g, 5 mmole), N-hydroxysuccinimide (4 g), and dicyclohexylcarbodiimide (DCC) (7 g) were dissolved in dimethylformamide (100 ml) and stirred overnight. The crystals of dicyclohexyl urea that formed were separated by filtration. To the filtrate, ethyl ether (400 ml) was added to precipitate a polyoxyethylene derivative of the activated ester (17 g). The precipitate was separated by filtration and then washed with ethyl ether.

Sources & evidence

ORD record
ord-0e76b030c10143b09196d373378e0551
Source dataset
uspto-grants-1987_06
Patent number
US04670417

Reaction notes

Loading…