Dicyclohexylcarbodiimide → HCID 86628796, compound

HRID 2354306Notes

Reaction equation

HRID 2354306 reaction equation
[CH2:1]([O:8][C@@H:9]1[C@@H:14]([O:15][CH2:16][C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=2)[C@H:13]([O:23][CH2:24][C:25]2[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=2)[C@@H:12]([CH2:31][O:32][CH2:33][C:34]2[CH:39]=[CH:38][CH:37]=[CH:36][CH:35]=2)[O:11][C@H:10]1[C:40]1[C:48]2[C:43](=[C:44]([CH3:49])[CH:45]=[CH:46][CH:47]=2)[N:42]([CH2:50][C:51]2[CH:56]=[CH:55][C:54](/[CH:57]=[CH:58]/[CH2:59][C:60]([OH:62])=[O:61])=[CH:53][CH:52]=2)[CH:41]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH3:63][C:64]1([CH3:71])[O:68][C@H:67]([CH2:69]O)[CH2:66][O:65]1.C1(N=C=NC2CCCCC2)CCCCC1>CN(C)C1C=CN=CC=1.ClCCl>[CH2:1]([O:8][C@@H:9]1[C@@H:14]([O:15][CH2:16][C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=2)[C@H:13]([O:23][CH2:24][C:25]2[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=2)[C@@H:12]([CH2:31][O:32][CH2:33][C:34]2[CH:39]=[CH:38][CH:37]=[CH:36][CH:35]=2)[O:11][C@H:10]1[C:40]1[C:48]2[C:43](=[C:44]([CH3:49])[CH:45]=[CH:46][CH:47]=2)[N:42]([CH2:50][C:51]2[CH:56]=[CH:55][C:54](/[CH:57]=[CH:58]/[CH2:59][C:60]([O:62][CH2:69][C@@H:67]3[CH2:66][O:65][C:64]([CH3:71])([CH3:63])[O:68]3)=[O:61])=[CH:53][CH:52]=2)[CH:41]=1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

6

Reactant 3

HCID 10868DicyclohexylcarbodiimideHCID 736056(R)-SolketalHCID 57616312HCID 57616312, compound

Product 1

HCID 86628796HCID 86628796, compoundYield 67.4%

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6344DichloromethaneSolvent

Procedure

To a mixture of 3-(2,3,4,6-tetra-O-benzyl-β-D-glucopyranosyl)-1-[4-((1E)-3-carboxyprop-1-enyl)benzyl]-7-methyl-1H-indole (0.30 g), (R)-(−)-2,2-dimethyl-1,3-dioxolane-4-methanol (62 mg), 4-dimethylaminopyridine (22 mg) and dichloromethane (1 mL) was added dicyclohexylcarbodiimide (0.11 g), and the mixture was stirred at room temperature overnight. The reaction mixture was directly purified by column chromatography on silica gel (eluent: n-hexane/ethyl acetate=3/1-3/2) to give 3-(2,3,4,6-tetra-O-benzyl-β-D-gluco-pyranosyl)-1-(4-{(1E)-3-[((S)-2,2-dimethyl-1,3-dioxolan-4-yl)methoxycarbonyl]prop-1-enyl}benzyl)-7-methyl-1H-indole (0.23 g). To a suspension of this material in dichloromethane (2 mL)-methanol (4 mL) was added Amberlyst 15 (0.40 g), and the mixture was stirred at 50° C. for 4 hours. The insoluble material was removed by filtration, and the solvent was removed under reduced pressure. The residue was purified by column chromatography on silica gel (eluent: n-hexane/ethyl acetate=1/2-1/4) to give 3-(2,3,4,6-tetra-O-benzyl-β-D-gluco-pyranosyl)-1-{4-[(1E)-3-((S)-2,3-dihydroxypropoxycarbonyl)-prop-1-enyl]benzyl}-7-methyl-1H-indole (0.12 g). This material was dissolved in a mixed solvent of methanol (2 mL) and tetra hydrofuran (2 mL). To the solution was added 10% palladium-carbon powder (0.10 g), and the mixture was stirred at room temperature under a hydrogen atmosphere for 4 hours. The insoluble material was removed by filtration, and the solvent was removed under reduced pressure. The residue was purified by column chromatography on silica gel (eluent: dichloromethane/methanol=8/1-5/1) to give the title compound (58 mg).

Workup

  1. customThe reaction mixture was directly purified by column chromatography on silica gel (eluent: n-hexane/ethyl acetate=3/1-3/2)

Sources & evidence

ORD record
ord-f39dd47e7f4b4a78925f966ced986e06
Source dataset
uspto-grants-2010_07
Patent number
US07750145B2

Reaction notes

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