Acetyl chloride → [(2R,3R,4S,5R,6S)-3,4,5-tribenzyloxy-6-[4-chloro-3-[[4-[2-(cyclopropoxy)ethoxy]phenyl]methyl]phenyl]-6-methoxy-tetrahydropyran-2-yl]methanol

HRID 1912984Notes

Reaction equation

HRID 1912984 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@@:12]([C:33]2[CH:38]=[CH:37][C:36]([Cl:39])=[C:35]([CH2:40][C:41]3[CH:46]=[CH:45][C:44]([O:47][CH2:48][CH2:49][O:50][CH:51]4[CH2:53][CH2:52]4)=[CH:43][CH:42]=3)[CH:34]=2)([O:31][CH3:32])[O:11][C@@H:10]1[CH2:54][O:55][Si](C(C)(C)C)(C)C)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C(Cl)(=O)C>CO>[CH2:1]([O:8][C@H:9]1[C@H:14]([O:15][CH2:16][C:17]2[CH:18]=[CH:19][CH:20]=[CH:21][CH:22]=2)[C@@H:13]([O:23][CH2:24][C:25]2[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=2)[C@@:12]([C:33]2[CH:38]=[CH:37][C:36]([Cl:39])=[C:35]([CH2:40][C:41]3[CH:46]=[CH:45][C:44]([O:47][CH2:48][CH2:49][O:50][CH:51]4[CH2:52][CH2:53]4)=[CH:43][CH:42]=3)[CH:34]=2)([O:31][CH3:32])[O:11][C@@H:10]1[CH2:54][OH:55])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

4

Reactant 2

HCID 6367Acetyl chlorideHCID 86685101[[(2R,3R,4S,5R,6S)-3,4,5-tribenzyloxy-6-[4-chloro-3-[[4-[2-(cyclopropoxy)ethoxy]phenyl]methyl]phenyl]-6-methoxy-tetrahydropyran-2-yl]methoxy]-tert-butyl-dim-ethyl-silane

Product 1

HCID 86685102[(2R,3R,4S,5R,6S)-3,4,5-tribenzyloxy-6-[4-chloro-3-[[4-[2-(cyclopropoxy)ethoxy]phenyl]methyl]phenyl]-6-methoxy-tetrahydropyran-2-yl]methanolYield 62.2%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

Crude [[(2R,3R,4S,5R,6S)-3,4,5-tribenzyloxy-6-[4-chloro-3-[[4-[2-(cyclopropoxy)ethoxy]phenyl]methyl]phenyl]-6-methoxy-tetrahydropyran-2-yl]methoxy]tert-butyl-dimethyl-silane 1c (4.26 g, 4.92 mmol) was dissolved in 30 mL methanol, followed by addition of acetyl chloride (52 μL, 0.74 mmol). The reaction mixture was stirred for 1 hour. The reaction mixture was concentrated under reduced pressure and purified by silica gel chromatography with elution system B to obtain the title compound [(2R,3R,4S,5R,6S)-3,4,5-tribenzyloxy-6-[4-chloro-3-[[4-[2-(cyclopropoxy)ethoxy]phenyl]methyl]phenyl]-6-methoxy-tetrahydropyran-2-yl]methanol 1d (2.3 g, yellow grease), yield: 62.2%. 1H NMR (400 MHz, CDCl3): δ 7.35 (m, 13H), 7.20 (m, 3H), 7.03 (m, 4H), 6.80 (d, 2H), 4.92 (m, 3H), 4.70 (m, 1H), 4.50 (m, 1H), 4.17 (m, 1H), 4.05 (m, 3H), 3.85 (m, 6H), 3.70 (m, 2H), 3.40 (m, 1H), 3.30 (m, 1H), 3.07 (s, 3H), 0.63 (m, 2H), 0.48 (m, 2H).

Workup

  1. concentrationThe reaction mixture was concentrated under reduced pressure
  2. custompurified by silica gel chromatography with elution system B

Sources & evidence

ORD record
ord-8a3e765f5c7b4797948c8123a414dcd3
Source dataset
uspto-grants-2013_12
Patent number
US08609622B2

Reaction notes

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