(3S, 4R)3-[(R)-1-t-Butyldimethylsilyloxyethyl]-4-[1-methyl-2-p-nitrobenzyloxycarbonylaminoethylthio(thiocarbonyl)]thioazetidin-2-one → (3S, 4R)-3-[(R)-1-t-Butyldimethylsilyloxyethyl]-1-[1-hydroxy-1-(p-nitrobenzyloxycarbonyl)methyl]-4-[1-methyl-2-p-nitrobenzyloxycarbonylaminoethylthio(thiocarbonyl)]thioazetidin-2-one

HRID 1075219Notes

Reaction equation

HRID 1075219 reaction equation
[Si:1]([O:8][C@@H:9]([C@@H:11]1[C@@H:14]([S:15][C:16]([S:18][CH:19]([CH3:35])[CH2:20][NH:21][C:22]([O:24][CH2:25][C:26]2[CH:31]=[CH:30][C:29]([N+:32]([O-:34])=[O:33])=[CH:28][CH:27]=2)=[O:23])=[S:17])[NH:13][C:12]1=[O:36])[CH3:10])([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].O.[C:38]([O:42][CH2:43][C:44]1[CH:49]=[CH:48][C:47]([N+:50]([O-:52])=[O:51])=[CH:46][CH:45]=1)(=[O:41])[CH:39]=[O:40]>C1C=CC=CC=1>[Si:1]([O:8][C@@H:9]([C@@H:11]1[C@@H:14]([S:15][C:16]([S:18][CH:19]([CH3:35])[CH2:20][NH:21][C:22]([O:24][CH2:25][C:26]2[CH:27]=[CH:28][C:29]([N+:32]([O-:34])=[O:33])=[CH:30][CH:31]=2)=[O:23])=[S:17])[N:13]([CH:39]([OH:40])[C:38]([O:42][CH2:43][C:44]2[CH:45]=[CH:46][C:47]([N+:50]([O-:52])=[O:51])=[CH:48][CH:49]=2)=[O:41])[C:12]1=[O:36])[CH3:10])([C:4]([CH3:7])([CH3:5])[CH3:6])([CH3:3])[CH3:2]

Participants

4

Reactant 2

HCID 13175762(3S, 4R)3-[(R)-1-t-Butyldimethylsilyloxyethyl]-4-[1-methyl-2-p-nitrobenzyloxycarbonylaminoethylthio(thiocarbonyl)]thioazetidin-2-oneHCID 21934455p-Nitrobenzyl glyoxylate hydrate

Product 1

HCID 13175764(3S, 4R)-3-[(R)-1-t-Butyldimethylsilyloxyethyl]-1-[1-hydroxy-1-(p-nitrobenzyloxycarbonyl)methyl]-4-[1-methyl-2-p-nitrobenzyloxycarbonylaminoethylthio(thiocarbonyl)]thioazetidin-2-oneYield 75%

Reagents, catalysts & solvents 1

HCID 241BenzeneSolvent

Procedure

A mixture of 230 mg (0.40 mmole) of (3S, 4R)-3-[(R)-1-t-butyldimethylsilyloxyethyl]-4-[1-methyl-2-p-nitrobenzyloxycarbonylaminoethylthio(thiocarbonyl)]thioazetidin-2-one, 182 mg (0.80 mmole) of p-nitrobenzyl glyoxylate hydrate and 5 ml of benzene was heated under reflux for 10 hours. After completion of the reaction the solvent was distilled off and the resulting residue was subjected to column chromatography through 10 g of silica gel eluted with a 7-10% v/v solution of ethyl acetate in benzene to afford 234 mg (yield 75%) of the desired product as a yellow oil.

Workup

  1. temperaturewas heated
  2. temperatureunder reflux for 10 hours
  3. customAfter completion of the reaction the solvent
  4. distillationwas distilled off
  5. washeluted with a 7-10% v/v solution of ethyl acetate in benzene

Sources & evidence

ORD record
ord-bf8c235f9c6a40bca009ac321e8f8da5
Source dataset
uspto-grants-1983_07
Patent number
US04395418

Reaction notes

Loading…