Pyridine → 3[2-(4-Ethyl-2,3-dioxopiperazine-1-carbonylamino)-2-phenylacetamido]-3-formamido-4-methylazetidin-2-one

HRID 2118560

Reaction equation

HRID 2118560 reaction equation
[NH2:1][C:2]1([NH:8][C:9](=[O:30])[CH:10]([NH:17][C:18]([N:20]2[CH2:25][CH2:24][N:23]([CH2:26][CH3:27])[C:22](=[O:28])[C:21]2=[O:29])=[O:19])[C:11]2[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=2)[CH:5]([CH3:6])[NH:4][C:3]1=[O:7].N1C=CC=CC=1.[C:37](OC=O)(=[O:39])C>ClCCl>[CH2:26]([N:23]1[CH2:24][CH2:25][N:20]([C:18]([NH:17][CH:10]([C:11]2[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=2)[C:9]([NH:8][C:2]2([NH:1][CH:37]=[O:39])[CH:5]([CH3:6])[NH:4][C:3]2=[O:7])=[O:30])=[O:19])[C:21](=[O:29])[C:22]1=[O:28])[CH3:27]

Participants

5

Reactant 3

HCID 1049PyridineHCID 75269Acetic-formic anhydrideHCID 201628613-Amino-3[2-(4-ethyl-2,3-dioxopiperazine-1-carbonylamino)-2-phenylacetamido]-4-methylazetidin-2-one

Product 1

HCID 201628873[2-(4-Ethyl-2,3-dioxopiperazine-1-carbonylamino)-2-phenylacetamido]-3-formamido-4-methylazetidin-2-oneYield 86.2%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

A solution of the amine (62) (87 mg) and pyridine (33 mg) in dry dichloromethane (2 ml) was treated with formic acetic anhydride (40 mg) for 24 hour after which time the solvent was removed in vacuo. Dry dioxan was added and solution re-evaporated (×3). Silica gel column chromatography of the residue gave the title compound (63) (80 mg) as a white powder, νmax. (Nujol) 3500, 3250, 1770, 1710, 1670, and 1500 cm-1, δ[(CD3)2CO] 0.88, 0.96, 1.00 and 1.03 (each d, J 6.5 Hz, together 3H) (irradiation at 4.00 caused the signals centered at 0.88 and 0.96 to collapse to 2×s), 1.16 (t, J7 Hz, 3H), 3.49(q, J7.Hz, 2H), 3.58-3.68 (m.2H), 3.93-4.23 (complex m, together 3H), 5.59-5.84 (complex m, together 1 H) (collapses to 4×s at 5.65, 5.69, 5.76 and 5.80 upon irradiation at 10.0), 7.25-7.80 (complex m, together 6H) (simplifies on exchange with D2O to a m at 7.25-7.56), 7.97-8.86 (complex m, together 3H) (simplifies to 4×s at 8.03, 8.11, 8.24, and 8.48 on exch.), 9.90-10.05 (m, 1H, exch).

Workup

  1. customwas removed in vacuo
  2. additionDry dioxan was added
  3. customsolution re-evaporated (×3)

Sources & evidence

ORD record
ord-7fd4311c308e40b48b0f9f8db0de0d51
Source dataset
uspto-grants-1987_07
Patent number
US04678782

Linked notes

Loading…