3-Oxo-azetidine-1-carboxylic acid tert-butyl ester → HCID 86727314, compound

HRID 518968Notes

Reaction equation

HRID 518968 reaction equation
[NH2:1][C:2]1[CH:3]=[C:4]2[C:13](=[CH:14][C:15]=1[CH3:16])[O:12][CH2:11][C:10]1[N:5]2[CH:6]([CH3:18])[C:7](=[O:17])[NH:8][N:9]=1.[C:19]([O:23][C:24]([N:26]1[CH2:29][C:28](=O)[CH2:27]1)=[O:25])([CH3:22])([CH3:21])[CH3:20].C([BH3-])#N.[Na+]>CO.C(O)(=O)C>[C:19]([O:23][C:24]([N:26]1[CH2:29][CH:28]([NH:1][C:2]2[CH:3]=[C:4]3[C:13](=[CH:14][C:15]=2[CH3:16])[O:12][CH2:11][C:10]2[N:5]3[CH:6]([CH3:18])[C:7](=[O:17])[NH:8][N:9]=2)[CH2:27]1)=[O:25])([CH3:22])([CH3:20])[CH3:21]

Participants

6

Reactant 3

HCID 15194043-Oxo-azetidine-1-carboxylic acid tert-butyl esterHCID 5003444Sodium cyanoborohydrideHCID 86727313HCID 86727313, compound

Product 1

HCID 86727314HCID 86727314, compoundYield 44%

Reagents, catalysts & solvents 2

HCID 176Acetic AcidSolventHCID 887MethanolSolvent

Procedure

A solution of 6-amino-4,7-dimethyl-2,10-dihydro-9-oxa-1,2,4a-triaza-phenanthren-3-one ((Example #54, Step E, 0.060 g, 0.24 mmol) and 3-oxo-azetidine-1-carboxylic acid tert-butyl ester (0.083 g, 0.41 mmol) in MeOH (4.5 mL) and acetic acid (0.5 mL) was stirred at ambient temperature for 1 h. Sodium cyanoborohydride (0.031 g, 0.41 mmol) was added and the resulting dark solution was stirred at ambient temperature for 14 h. The solvent was removed in vacuo to give the crude product, which was purified by preparative TLC (eluting with 33% EtOAc in petroleum ether) to give 3-(4,7-dimethyl-3-oxo-2,3,4,10-tetrahydro-9-oxa-1,2,4a-triaza-phenanthren-6-ylamino)-azetidine-1-carboxylic acid tert-butyl ester (0.042 g, 44%) as an off-white solid. LC/MS (Table 1, Method 2) Rt=1.065 min.; MS m/z: 424 [M+23]+.

Workup

  1. customThe solvent was removed in vacuo
  2. customto give the crude product, which
  3. customwas purified by preparative TLC (eluting with 33% EtOAc in petroleum ether)

Sources & evidence

ORD record
ord-a53cb706ada543fdb2c0e129379013e1
Source dataset
uspto-grants-2015_08
Patent number
US09115151B2

Reaction notes

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