1,2-Dichloroethane → (S)-benzyl 2-{[(benzyloxy)carbonyl]amino}-5-[(2-{[alpha-D-mannopyranosyl-(1->3)-[alpha-D-mannopyranosyl-(1->6)]-alpha-D-mannopyranosyl]oxy}ethyl)amino]-5-oxopentanoate

HRID 1488265Notes

Reaction equation

HRID 1488265 reaction equation
[C@H:1]1([O:12][C@H:13]2[C@H:22]([OH:23])[C@@H:21]([CH2:24][O:25][C@H:26]3[O:34][C@H:33]([CH2:35][OH:36])[C@@H:31]([OH:32])[C@H:29]([OH:30])[C@@H:27]3[OH:28])[O:20][C@H:15]([O:16][CH2:17][CH2:18][NH2:19])[C@H:14]2[OH:37])[O:9][C@H:8]([CH2:10][OH:11])[C@@H:6]([OH:7])[C@H:4]([OH:5])[C@@H:2]1[OH:3].[CH2:38]([O:45][C:46](=[O:64])[C@@H:47]([NH:53][C:54]([O:56][CH2:57][C:58]1[CH:63]=[CH:62][CH:61]=[CH:60][CH:59]=1)=[O:55])[CH2:48][CH2:49][C:50](O)=[O:51])[C:39]1[CH:44]=[CH:43][CH:42]=[CH:41][CH:40]=1.C(Cl)CCl>CN(C=O)C.CN(C1C=CN=CC=1)C>[CH2:57]([O:56][C:54]([NH:53][C@@H:47]([CH2:48][CH2:49][C:50]([NH:19][CH2:18][CH2:17][O:16][C@H:15]1[O:20][C@H:21]([CH2:24][O:25][C@H:26]2[O:34][C@H:33]([CH2:35][OH:36])[C@@H:31]([OH:32])[C@H:29]([OH:30])[C@@H:27]2[OH:28])[C@@H:22]([OH:23])[C@H:13]([O:12][C@H:1]2[O:9][C@H:8]([CH2:10][OH:11])[C@@H:6]([OH:7])[C@H:4]([OH:5])[C@@H:2]2[OH:3])[C@@H:14]1[OH:37])=[O:51])[C:46]([O:45][CH2:38][C:39]1[CH:44]=[CH:43][CH:42]=[CH:41][CH:40]=1)=[O:64])=[O:55])[C:58]1[CH:59]=[CH:60][CH:61]=[CH:62][CH:63]=1

Participants

6

Reactant 3

HCID 111,2-DichloroethaneHCID 6994031(4S)-5-(Benzyloxy)-4-(((benzyloxy)carbonyl)amino)-5-oxopentanoic acidHCID 117136792-Aminoethyl 3,6-di-O-(alpha-D-mannopyranosyl)-alpha-D-mannopyranoside

Product 1

HCID 131736861(S)-benzyl 2-{[(benzyloxy)carbonyl]amino}-5-[(2-{[alpha-D-mannopyranosyl-(1->3)-[alpha-D-mannopyranosyl-(1->6)]-alpha-D-mannopyranosyl]oxy}ethyl)amino]-5-oxopentanoate

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6228DimethylformamideSolvent

Procedure

To a solution of 2-aminoethyl α-D-mannopyranosyl-(1→3)-[α-D-mannopyranosyl-(1→6)]-α-D-mannopyranoside (2.6 g, 4.75 mmol), and (S)-5-(benzyloxy)-4-{[(benzyloxy)carbonyl]amino}-5-oxopentanoic acid (2.0 g, 5.39 mmol) in DMF (36 mL) at 0° C. was added DMAP (580 mg, 4.75 mmol) and EDC (3.64 g, 19.00 mmol). The reaction mixture was allowed to gradually warm up to rt. After stirring for 16 hr, the reaction mixture was concentrated and the residue was purified by flash chromatography on C18 reverse phase silica gel (275 g), eluting with 10-55% AcCN in H2O to give the title compound. UPLC Method B: calculated for C40H56N2O21 900.34, observed m/e: 901.26 [M+1]; Rt=2.46 min.

Workup

  1. concentrationthe reaction mixture was concentrated
  2. customthe residue was purified by flash chromatography on C18 reverse phase silica gel (275 g)
  3. washeluting with 10-55% AcCN in H2O

Sources & evidence

ORD record
ord-886bd37acf324f94a594226c512abcb1
Source dataset
uspto-grants-2016_08
Patent number
US09427475B2

Reaction notes

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