Triethylamine → (2S,3R,4R,5S)-2,5-Bis-(N-Cbz-amino)-3,4-bis-(mesyloxy)-1,6-diphenylhexane

HRID 356760Notes

Reaction equation

HRID 356760 reaction equation
[C:1]([NH:11][C@H:12]([C@@H:20]([OH:42])[C@H:21]([OH:41])[C@@H:22]([NH:30][C:31]([O:33][CH2:34][C:35]1[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=1)=[O:32])[CH2:23][C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1)[CH2:13][C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1)([O:3][CH2:4][C:5]1[CH:10]=[CH:9][CH:8]=[CH:7][CH:6]=1)=[O:2].[CH3:43][S:44](Cl)(=[O:46])=[O:45].C(N(CC)CC)C>ClCCl.CN(C)C1C=CN=CC=1>[C:1]([NH:11][C@H:12]([C@@H:20]([O:42][S:44]([CH3:43])(=[O:46])=[O:45])[C@H:21]([O:41][S:44]([CH3:43])(=[O:46])=[O:45])[C@@H:22]([NH:30][C:31]([O:33][CH2:34][C:35]1[CH:36]=[CH:37][CH:38]=[CH:39][CH:40]=1)=[O:32])[CH2:23][C:24]1[CH:25]=[CH:26][CH:27]=[CH:28][CH:29]=1)[CH2:13][C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1)([O:3][CH2:4][C:5]1[CH:10]=[CH:9][CH:8]=[CH:7][CH:6]=1)=[O:2]

Participants

6

Reactant 3

HCID 8471TriethylamineHCID 31297Methanesulfonyl chlorideHCID 10393187dibenzyl ((2S,3R,4R,5S)-3,4-dihydroxy-1,6-diphenylhexane-2,5-diyl)dicarbamate

Product 1

HCID 18655486(2S,3R,4R,5S)-2,5-Bis-(N-Cbz-amino)-3,4-bis-(mesyloxy)-1,6-diphenylhexaneYield 90%

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6344DichloromethaneSolvent

Procedure

A slurry of 1.50 g (2.64 mmol) of (2S,3R,4R,5S)-2,5-bis-(N-Cbz-amino)-3,4-dihydroxy-1,6-diphenylhexane in 50 ml of anhydrous dichloromethane was cooled to 0° C. and treated sequentially with 0.43 ml of methanesulfonyl chloride, 64 mg of 4-dimethylaminopyridine and 1.1 ml of triethylamine. The resulting mixture was stirred for 15 h with the temperature being allowed to slowly climb to ambient temperature. After treatment with aqueous NH4Cl, the separated organic layer was washed with aqueous NaHCO3, dried over MgSO4, and concentrated in vacuo to provide 1.70 g (90%) of the desired compound, m.p. 153°-155° C. 1H NMR (CDCl3) δ 2.73 (m, 2 H), 2.92 (m, 2 H), 3.09 (s, 6 H), 4.61 (m, 2 H), 4.83-5.06 (m, 8 H), 7.12-7.37 (m, 20 H).

Workup

  1. customto slowly climb to ambient temperature
  2. washAfter treatment with aqueous NH4Cl, the separated organic layer was washed with aqueous NaHCO3
  3. dry with materialdried over MgSO4
  4. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-43a398479fe14df5a946166e09f18b4e
Source dataset
uspto-grants-1998_11
Patent number
US05837873

Reaction notes

Loading…