Diisopropylethylamine → (R)-1-(3,5-dibromo-4-hydroxy-benzyl)-2-(1'-methanesulphonyl-4,4'-bipiperidinyl-1-yl)-2-oxo-ethyl 4-(2-oxo-1,2,4,5-tetrahydro-1,3-benzodiazepin-3-yl)-piperidine-1-carboxylate

HRID 643634Notes

Reaction equation

HRID 643634 reaction equation
[O:1]=[C:2]1[N:8]([CH:9]2[CH2:14][CH2:13][N:12]([C:15]([O:17][C@@H:18]([C:29](O)=[O:30])[CH2:19][C:20]3[CH:25]=[C:24]([Br:26])[C:23]([OH:27])=[C:22]([Br:28])[CH:21]=3)=[O:16])[CH2:11][CH2:10]2)[CH2:7][CH2:6][C:5]2[CH:32]=[CH:33][CH:34]=[CH:35][C:4]=2[NH:3]1.CN(C(ON1N=NC2C=CC=CC1=2)=[N+](C)C)C.[B-](F)(F)(F)F.C(N(C(C)C)C(C)C)C.[CH3:67][S:68]([N:71]1[CH2:76][CH2:75][CH:74]([CH:77]2[CH2:82][CH2:81][NH:80][CH2:79][CH2:78]2)[CH2:73][CH2:72]1)(=[O:70])=[O:69]>C1COCC1.CCOC(C)=O>[O:1]=[C:2]1[N:8]([CH:9]2[CH2:10][CH2:11][N:12]([C:15]([O:17][C@H:18]([CH2:19][C:20]3[CH:21]=[C:22]([Br:28])[C:23]([OH:27])=[C:24]([Br:26])[CH:25]=3)[C:29]([N:80]3[CH2:79][CH2:78][CH:77]([CH:74]4[CH2:73][CH2:72][N:71]([S:68]([CH3:67])(=[O:70])=[O:69])[CH2:76][CH2:75]4)[CH2:82][CH2:81]3)=[O:30])=[O:16])[CH2:13][CH2:14]2)[CH2:7][CH2:6][C:5]2[CH:32]=[CH:33][CH:34]=[CH:35][C:4]=2[NH:3]1

Participants

7

Reactant 4

HCID 81531DiisopropylethylamineHCID 2733207O-(Benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborateHCID 47782601-(Methylsulfonyl)-4,4'-bipiperidineHCID 67301880(R)-1-carboxy-2-(3,5-dibromo-4-hydroxy-phenyl)-ethyl 4-(2-oxo-1,2,4,5-tetrahydro-1,3-benzodiazepin-3-yl)-piperidine-1-carboxylate

Product 1

HCID 11992746(R)-1-(3,5-dibromo-4-hydroxy-benzyl)-2-(1'-methanesulphonyl-4,4'-bipiperidinyl-1-yl)-2-oxo-ethyl 4-(2-oxo-1,2,4,5-tetrahydro-1,3-benzodiazepin-3-yl)-piperidine-1-carboxylate

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 8857Ethyl AcetateSolvent

Procedure

A solution of 130 mg (0.21 mmol) of (R)-1-carboxy-2-(3,5-dibromo-4-hydroxy-phenyl)-ethyl 4-(2-oxo-1,2,4,5-tetrahydro-1,3-benzodiazepin-3-yl)-piperidine-1-carboxylate, 80 mg (0.25 mmol) TBTU and 50 μL (0.27 mmol) ethyldiisopropylamine in 10 mL THF was stirred for 50 min at RT. Then 60 mg (0.24 mmol) 1-methanesulphonyl-[4,4′]bipiperidinyl were added and the reaction mixture was stirred overnight at RT. The reaction solution was diluted with 50 mL EtOAc, extracted twice with 30 mL 15% K2CO3 solution, the organic phase was separated off and dried over MgSO4. After the desiccant and solvent had been eliminated the residue was triturated with water and filtered. The solid was combined with 5 mL 1 M HCl and stirred overnight. Further purification of the crude product was carried out by chromatography (silica gel, gradient DCM to DCM/MeOH/NH3 50:45:5). The fractions containing the product were combined, evaporated down i.vac., triturated with DIPE, suction filtered and dried at 40° C.

Workup

  1. extractionextracted twice with 30 mL 15% K2CO3 solution
  2. customthe organic phase was separated off
  3. dry with materialdried over MgSO4
  4. customwas triturated with water
  5. filtrationfiltered
  6. stirringstirred overnight
  7. customFurther purification of the crude product
  8. additionThe fractions containing the product
  9. customevaporated down i.vac
  10. custom, triturated with DIPE, suction
  11. filtrationfiltered
  12. customdried at 40° C.

Sources & evidence

ORD record
ord-053b9b38378442b4a37480bd304ff1a1
Source dataset
uspto-grants-2010_04
Patent number
US07700598B2

Reaction notes

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