Water → HCID 12817992, compound

HRID 1656164Notes

Reaction equation

[C:1]([NH:9][CH:10]([C:44]([O:46][CH:47]([C:54]1[CH:59]=[CH:58][CH:57]=[CH:56][CH:55]=1)[C:48]1[CH:53]=[CH:52][CH:51]=[CH:50][CH:49]=1)=[O:45])[CH2:11][CH2:12][CH2:13][C:14]([NH:16][CH:17]1[C:42](=[O:43])[N:19]2[C:20]([C:26]([O:28][CH:29]([C:36]3[CH:41]=[CH:40][CH:39]=[CH:38][CH:37]=3)[C:30]3[CH:35]=[CH:34][CH:33]=[CH:32][CH:31]=3)=[O:27])=[C:21]([CH2:24]O)[CH2:22][S:23][C@H:18]12)=[O:15])(=[O:8])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.P(Cl)(Cl)(Cl)(Cl)[Cl:61].N1C=CC=CC=1.O>C(Cl)Cl>[C:1]([NH:9][CH:10]([C:44]([O:46][CH:47]([C:54]1[CH:59]=[CH:58][CH:57]=[CH:56][CH:55]=1)[C:48]1[CH:53]=[CH:52][CH:51]=[CH:50][CH:49]=1)=[O:45])[CH2:11][CH2:12][CH2:13][C:14]([NH:16][CH:17]1[C:42](=[O:43])[N:19]2[C:20]([C:26]([O:28][CH:29]([C:36]3[CH:41]=[CH:40][CH:39]=[CH:38][CH:37]=3)[C:30]3[CH:35]=[CH:34][CH:33]=[CH:32][CH:31]=3)=[O:27])=[C:21]([CH2:24][Cl:61])[CH2:22][S:23][C@H:18]12)=[O:15])(=[O:8])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

Conditions

Temperature: -20 °C

Procedure

To a solution of benzhydryl 7-(5-benzamido-5-benzhydryloxycarbonylpentanamido)-3-hydroxymethyl-3-cephem-4-carboxylate (100 g) in methylene chloride (600 ml) was added at a time phosphorus pentachloride (25.6 g) at -30° C., followed by adding dropwise pyridine (9.8 g) at the same temperature. After the reaction mixture was stirred at -20° C. for an hour, it was poured into a mixture of methylene chloride (500 ml) and water (300 ml). The separated organic layer was washed with an aqueous sodium chloride, dried over magnesium sulfate and then evaporated to dryness to obtain benzhydryl 7-(5-benzamido-5-benzhydryloxycarbonylpentanamido)-3-chloromethyl-3-cephem-4-carboxylate (114.5 g), mp 90°-110° C. (dec.).

Workup

washThe separated organic layer was washed with an aqueous sodium chloride
dry with materialdried over magnesium sulfate
customevaporated to dryness

Sources & evidence

ORD record: ord-daae031dece3415abd7511934d9ab157
Source dataset: uspto-grants-1993_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05252731

Reaction notes

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