4-Methylmorpholine → Benzyl 3-{[(alpha-Chloroethoxy)carbonyl]aminomethyl}-5-Methyl-Hexanoate

HRID 30524Notes

Reaction equation

Cl.[NH2:2][CH2:3][CH:4]([CH2:16][CH:17]([CH3:19])[CH3:18])[CH2:5][C:6]([O:8][CH2:9][C:10]1[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=1)=[O:7].CN1CCOCC1.Cl[C:28]([O:30][CH:31]([Cl:33])[CH3:32])=[O:29]>ClCCl>[Cl:33][CH:31]([O:30][C:28]([NH:2][CH2:3][CH:4]([CH2:16][CH:17]([CH3:19])[CH3:18])[CH2:5][C:6]([O:8][CH2:9][C:10]1[CH:11]=[CH:12][CH:13]=[CH:14][CH:15]=1)=[O:7])=[O:29])[CH3:32]

Participants

Conditions

Temperature: 0 °C

Procedure

To a stirred solution of (39) (428 mg, 1.51 mmol) in dichloromethane at 0° C. was added N-methylmorpholine (0.33 mL, 3.02 mmol) and 1-chloroethyl chloroformate (0.164 mL, 1.51 mmol). The resulting solution was stirred at 0° C. until the reaction was complete (˜30 min, as monitored by TLC) and then was diluted with dichloromethane, washed successively with cold 1N HCl solution, water and brine, then dried over anhydrous Na2SO4. Filtration and removal of the solvent in vacuo afforded the title compound (40) as a mixture of two diastereomers (530 mg, 100%), which was used without further purification in the following example. 1H—NMR (CDCl3, 400 MHz): δ 0.87 (m, 6H), 1.13 (m, 2H), 1.63 (m, 1H), 1.76 (m, 3H), 2.15 (m, 1H), 2.34 (m, 2H), 3.10 (m, 1H), 3.27 (m, 1H), 5.11 (br.s, 3H), 6.53 (q, 1H), 7.33 (m, 5H).

Workup

custom(˜30 min, as monitored by TLC)
washwashed successively with cold 1N HCl solution, water and brine
dry with materialdried over anhydrous Na2SO4
filtrationFiltration and removal of the solvent in vacuo

Sources & evidence

ORD record: ord-d608cfffcff048a3ae254f4b90f2bbbf
Source dataset: uspto-grants-2008_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07423169B2

Reaction notes

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