1,1'-Carbonyldiimidazole → 4-Hydroxy-5-[(4-methoxy-7-morpholin-4-yl-benzothiazole-2-carbonyl)-amino]-azepane-1-carboxylic acid tert-butyl ester

HRID 1244307Notes

Reaction equation

HRID 1244307 reaction equation
[CH3:1][O:2][C:3]1[C:8]2[N:9]=[C:10]([C:12]([OH:14])=O)[S:11][C:7]=2[C:6]([N:15]2[CH2:20][CH2:19][O:18][CH2:17][CH2:16]2)=[CH:5][CH:4]=1.C(N1C=CN=C1)(N1C=CN=C1)=O.[C:33]([O:37][C:38]([N:40]1[CH2:46][CH2:45][CH:44]([OH:47])[CH:43]([NH2:48])[CH2:42][CH2:41]1)=[O:39])([CH3:36])([CH3:35])[CH3:34]>CN(C)C=O>[C:33]([O:37][C:38]([N:40]1[CH2:41][CH2:42][CH:43]([NH:48][C:12]([C:10]2[S:11][C:7]3[C:6]([N:15]4[CH2:20][CH2:19][O:18][CH2:17][CH2:16]4)=[CH:5][CH:4]=[C:3]([O:2][CH3:1])[C:8]=3[N:9]=2)=[O:14])[CH:44]([OH:47])[CH2:45][CH2:46]1)=[O:39])([CH3:36])([CH3:34])[CH3:35]

Participants

5

Reactant 3

HCID 682631,1'-CarbonyldiimidazoleHCID 219192164-Methoxy-7-morpholin-4-yl-benzothiazole-2-carboxylic acidHCID 58717039tert-Butyl trans-4-amino-5-hydroxyazepane-1-carboxylate

Product 1

HCID 691841154-Hydroxy-5-[(4-methoxy-7-morpholin-4-yl-benzothiazole-2-carbonyl)-amino]-azepane-1-carboxylic acid tert-butyl ester

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

According to scheme 10, to a stirred solution of 2,3,6,7-tetrahydro-azepine-1-carboxylic acid tert-butyl ester (XXX) in dichloromethane was added at −60° C. m-chloroperbenzoic acid (MCPBA). The mixture was allowed to slowly warm to room temperature overnight and 8-oxa-4-aza-bicyclo[5.1.0]octane-4-carboxylic acid tert-butyl ester (XXXI) was obtained. To a solution of 8-oxa-4-aza-bicyclo[5.1.0]octane-4-carboxylic acid tert-butyl ester in ethanol was added water, ammonium chloride and sodium azide. The mixture was stirred at 75° C. over night, to give 4-azido-5-hydroxy-azepane-1-carboxylic acid tert-butyl ester (XXXII). 4-Azido-5-hydroxy-azepane-1-carboxylic acid tert-butyl ester in methanol was hydrogenated in the presence of palladium on charcoal (10%) to yield 4-amino-5-hydroxy-azepane-1-carboxylic acid tert-butyl ester (XXXIII). 4-Methoxy-7-morpholin-4-yl-benzothiazole-2-carboxylic acid and 1,1′-carbonyl-diimidazole in dimethylformamide are stirred at room temperature for about 16 hours. 4-Amino-5-hydroxy-azepane-1-carboxylic acid tert-butyl ester was added and stirring was continued for 16 hours at room temperature. It was obtained 4-hydroxy-5-[(4-methoxy-7-morpholin-4-yl-benzothiazole-2-carbonyl)-amino]-azepane-1-carboxylic acid tert-butyl ester (XXXIV). To a solution of 4-hydroxy-5-[(4-methoxy-7-morpholin-4-yl-benzothiazole-2-carbonyl)-amino]-azepane-1-carboxylic acid tert-butyl ester in dimethylsulfoxide was added triethylamine, dichloromethane and a solution of sulfur trioxide pyridine complex in dimethylsulfoxide. The mixture was stirred for 18 hours at room temperature. After purification 4-[(4-methoxy-7-morpholin-4-yl-benzothiazole-2-carbonyl)-amino]-5-oxo-azepane-1-carboxylic acid tert-butyl ester (VIII) was obtained.

Sources & evidence

ORD record
ord-904141187fb1437c8185933236df4056
Source dataset
uspto-grants-2006_10
Patent number
US07122545B2

Reaction notes

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