Ethyl Acetate → (2S,4R)-4-methanesulfonyloxy-1-(4-nitrobenzyloxycarbonyl)-2-[2-{N-(4-nitrobenzyloxycarbonyl)aminomethyl}thiazol-4-yl]pyrrolidine

HRID 1649803Notes

Reaction equation

Br[CH2:2][C:3]([C@@H:5]1[CH2:9][C@@H:8]([O:10][S:11]([CH3:14])(=[O:13])=[O:12])[CH2:7][N:6]1[C:15]([O:17][CH2:18][C:19]1[CH:24]=[CH:23][C:22]([N+:25]([O-:27])=[O:26])=[CH:21][CH:20]=1)=[O:16])=O.[N+:28]([C:31]1[CH:45]=[CH:44][C:34]([CH2:35][O:36][C:37]([NH:39][CH2:40][C:41]([NH2:43])=[S:42])=[O:38])=[CH:33][CH:32]=1)([O-:30])=[O:29].C(OCC)(=O)C>CO.ClCCl>[CH3:14][S:11]([O:10][C@H:8]1[CH2:7][N:6]([C:15]([O:17][CH2:18][C:19]2[CH:20]=[CH:21][C:22]([N+:25]([O-:27])=[O:26])=[CH:23][CH:24]=2)=[O:16])[C@H:5]([C:3]2[N:43]=[C:41]([CH2:40][NH:39][C:37]([O:36][CH2:35][C:34]3[CH:44]=[CH:45][C:31]([N+:28]([O-:30])=[O:29])=[CH:32][CH:33]=3)=[O:38])[S:42][CH:2]=2)[CH2:9]1)(=[O:13])=[O:12]

Participants

Conditions

Temperature: 60 °C

Procedure

To a solution of (2S,4R)-2-bromoacetyl-4-methanesulfonyloxy- 1-(4-nitrobenzyloxycarbonyl)pyrrolidine (840 mg) in a mixture of methanol (30 ml) and dichloromethane (20 ml) was added 2-(4-nitrobenzyloxycarbonylamino)thioacetamide (700 mg) at room temperature. After stirring at 60° C. for 2 hours, the mixture was poured into ethyl acetate and washed with saturated aqueous sodium bicarbonate and bring successively. The dried organic layer was evaporated and the resulting oil was subjected to column chromatography on silica gel (30 g) eluting with ethyl acetate to give (2S,4R)-4-methanesulfonyloxy-1-(4-nitrobenzyloxycarbonyl)-2-[2-{N-(4-nitrobenzyloxycarbonyl)aminomethyl}thiazol-4-yl]pyrrolidine (540 mg).

Workup

washwashed with saturated aqueous sodium bicarbonate
customThe dried organic layer was evaporated
washeluting with ethyl acetate

Sources & evidence

ORD record: ord-0d0197ca0f204cbc8befc0fa2fa23238
Source dataset: uspto-grants-1990_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US04921852

Reaction notes

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