3-Oxo-azetidine-1-carboxylic acid tert-butyl ester → tert-butyl 3-(1-methyl-2-oxo-2,3,5,6-tetrahydro-1H-[1,2,4]triazino[4,3-a]quinolin-9-ylamino)azetidine-1-carboxylate

HRID 519081Notes

Reaction equation

HRID 519081 reaction equation
[NH2:1][C:2]1[CH:11]=[C:10]2[C:5]([CH2:6][CH2:7][C:8]3[N:9]2[CH:12]([CH3:17])[C:13](=[O:16])[NH:14][N:15]=3)=[CH:4][CH:3]=1.O=[C:19]1[CH2:22][N:21]([C:23]([O:25][C:26]([CH3:29])([CH3:28])[CH3:27])=[O:24])[CH2:20]1.C([BH3-])#N.[Na+]>CO.CC(O)=O>[CH3:17][CH:12]1[N:9]2[C:10]3[C:5]([CH2:6][CH2:7][C:8]2=[N:15][NH:14][C:13]1=[O:16])=[CH:4][CH:3]=[C:2]([NH:1][CH:19]1[CH2:20][N:21]([C:23]([O:25][C:26]([CH3:29])([CH3:28])[CH3:27])=[O:24])[CH2:22]1)[CH:11]=3

Participants

6

Reactant 3

HCID 15194043-Oxo-azetidine-1-carboxylic acid tert-butyl esterHCID 5003444Sodium cyanoborohydrideHCID 867274479-amino-1-methyl-5,6-dihydro-1H-[1,2,4]triazino[4,3-a]quinolin-2(3H)-one

Product 1

HCID 86727448tert-butyl 3-(1-methyl-2-oxo-2,3,5,6-tetrahydro-1H-[1,2,4]triazino[4,3-a]quinolin-9-ylamino)azetidine-1-carboxylateYield 34.1%

Reagents, catalysts & solvents 2

HCID 176Acetic AcidSolventHCID 887MethanolSolvent

Procedure

A solution of 9-amino-1-methyl-5,6-dihydro-1H-[1,2,4]triazino[4,3-a]quinolin-2(3H)-one (0.035 g, 0.152 mmol) and tert-butyl 3-oxoazetidine-1-carboxylate (0.078 g, 0.45 mmol) in MeOH (5 mL) and AcOH (0.5 mL) was stirred for 1 h at rt. Sodium cyanoborohydride (0.028 g, 0.456 mmol) was added and the reaction mixture was stirred at ambient temperature overnight. The solution was concentrated in vacuo and the residue was purified by preparative TLC (eluting with 50% EtOAc in petroleum ether) to give tert-butyl 3-(1-methyl-2-oxo-2,3,5,6-tetrahydro-1H-[1,2,4]triazino[4,3-a]quinolin-9-ylamino)azetidine-1-carboxylate (0.020 g, 34%). LC/MS (Table 1, Method 2) Rt=1.104 min; MS m/z: 386 [M+H]+.

Workup

  1. concentrationThe solution was concentrated in vacuo
  2. customthe residue was purified by preparative TLC (eluting with 50% EtOAc in petroleum ether)

Sources & evidence

ORD record
ord-444251dc34c443388c3ef6b98dd7497c
Source dataset
uspto-grants-2015_08
Patent number
US09115151B2

Reaction notes

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