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Methanesulfonyl chloride → (1S,9S) t-Butyl 6,10-dioxo-9-methylsulphonylamino-1,2,3,4,7,8,9,10-octahydro-6H-pyridazino-[1,2-a][1,2]diazepine-1-carboxylate

HRID 1384704
Notes
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Reaction equation

HRID 1384704 reaction equation
[NH2:1][CH:2]1[C:8](=[O:9])[N:7]2[CH:10]([C:14]([O:16][C:17]([CH3:20])([CH3:19])[CH3:18])=[O:15])[CH2:11][CH2:12][CH2:13][N:6]2[C:5](=[O:21])[CH2:4][CH2:3]1.C(N(C(C)C)CC)(C)C.[CH3:31][S:32](Cl)(=[O:34])=[O:33]>C(Cl)Cl.CCOC(C)=O>[O:21]=[C:5]1[CH2:4][CH2:3][C@H:2]([NH:1][S:32]([CH3:31])(=[O:34])=[O:33])[C:8](=[O:9])[N:7]2[C@H:10]([C:14]([O:16][C:17]([CH3:18])([CH3:20])[CH3:19])=[O:15])[CH2:11][CH2:12][CH2:13][N:6]12
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 3

HCID 31297Methanesulfonyl chlorideHCID 81531DiisopropylethylamineHCID 11174000HCID 11174000, compound

Product 1

HCID 57132364(1S,9S) t-Butyl 6,10-dioxo-9-methylsulphonylamino-1,2,3,4,7,8,9,10-octahydro-6H-pyridazino-[1,2-a][1,2]diazepine-1-carboxylateYield 77%

Reagents, catalysts & solvents 2

HCID 6344
Dichloromethane
Solvent
HCID 8857Ethyl AcetateSolvent

Procedure

A solution of t-butyl 9-amino-6,10-dioxo-1,2,3,4,7,8,9,10-octahydro-6H-pyridazino[1,2-a][1,2]diazepine-1-carboxylate (GB 2,128,984; 831 mg, 2.79 mmol) and diisopropylethylamine (1.22 ml, 6.99 mmol, 2.5 equiv) in CH2Cl2 (10 ml) under dry nitrogen was treated with methanesulphonyl chloride (237 μl, 3.07 mmol 1.1 equiv). The mixture was stirred for 1 h, diluted with EtOAc (75 ml) and washed with saturated NaHCO3 (50 ml) and saturated aqueous sodium chloride (30 ml), dried (MgSO4) and concentrated. Flash chromatography (10-35% EtOAc in CH2Cl2) afforded 211b (806 mg, 77%) as a colourless solid: mp 68-70° C.; [α]D23 −109 (c 1.09, CH2Cl2); IR (KBr) 3270, 2980, 2939, 1735, 1677, 1458, 1447, 1418, 1396, 1370, 1328, 1272, 1252, 1232, 1222, 1156, 1131, 991; 1H NMR (CDCl3) δ 6.15 (1H, d), 5.31 (1H, m), 4.65-4.11 (2H, m), 3.47 (1H, m) 2.99 (3H, s), 2.89 (1H, m), 2.72-2.51 (2H, m), 2.34 (1H, m), 2.26 (1H, m), 2.05-1.62 (4H, m), 1.47 (9H, s);

Workup

  1. washwashed with saturated NaHCO3 (50 ml) and saturated aqueous sodium chloride (30 ml)
  2. dry with materialdried (MgSO4)
  3. concentrationconcentrated

Sources & evidence

ORD record
ord-a6a28fa8a18e413a8ff5ac17d078848f
Source dataset
uspto-grants-2001_07
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US06258948B1

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes