Dicyclohexylcarbodiimide → Ethyl cyclohexanoate

HRID 731292Notes

Reaction equation

HRID 731292 reaction equation
[CH2:1]([O:3][C:4]([CH:6]1[CH2:11][CH2:10][CH2:9][CH2:8][CH:7]1NCCC(C)C)=[O:5])[CH3:2].CS(NC1C=CC2NC(CC(O)=O)=NS(=O)(=O)C=2C=1)(=O)=O.C1(N=C=NC2CCCCC2)CCCCC1>CN(C)C=O.ClCCl>[CH2:1]([O:3][C:4]([CH:6]1[CH2:11][CH2:10][CH2:9][CH2:8][CH2:7]1)=[O:5])[CH3:2]

Participants

6

Reactant 3

HCID 10868DicyclohexylcarbodiimideHCID 248585392H-1,2,4-Benzothiadiazine-3-acetic acid, 7-[(methylsulfonyl)amino]-, 1,1-dioxideHCID 57671214HCID 57671214, compound

Product 1

HCID 18686Ethyl cyclohexanoate

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 6344DichloromethaneSolvent2×

Conditions

Temperature
25 °C

Procedure

To a solution of cis-(2-(3-methylbutylamino)-cyclohexanecarboxylic acid ethyl ester (58.7 mg, 0.243 mmol) in N,N-dimethylformamide (5.0 mL) was added (7-methanesulfonylamino-1,1-dioxo-1,4-dihydro-1λ6-benzo[1,2,4]thiadiazin-3-yl)-acetic acid (prepared as described in Example 1j, 162.0 mg, 0.486 mmol) and a 1.0 M solution of N,N′-dicyclohexylcarbodiimide in dichloromethane (0.49 mL, 0.49 mmol). After stirring at 25° C. for 12 h, the mixture was diluted with dichloromethane and the precipitated N,N′-dicyclohexylurea byproduct was removed by filtration. The filtrate was concentrated and dried in vacuo to afford the crude product, cis-2-[2-(7-methanesulfonylamino-1,1-dioxo-1,4-dihydro-1λ6-benzo[1,2,4]thiadiazin-3-yl)-acetyl]-(3-methylbutyl)amino]-cyclohexanecarboxylic acid ethyl ester, as a yellowish oil. The crude product was used in the next step without further purification. LC-MS (ESI) calcd for C24H36N4O7S2 556.20, found 557.3 [M+H+].

Workup

  1. customthe precipitated N,N′-dicyclohexylurea byproduct was removed by filtration
  2. concentrationThe filtrate was concentrated
  3. customdried in vacuo

Sources & evidence

ORD record
ord-1d90359b1e91422885f1ffbb5e689ba6
Source dataset
uspto-grants-2009_09
Patent number
US07582626B2

Reaction notes

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