Water → 60924-38-1

HRID 254392Notes

Reaction equation

[CH3:1][C@H:2]1[C@@:11]2([CH3:27])[C@H:12]([O:22][C:23]([CH2:25][OH:26])=[O:24])[CH2:13][C@:14]([CH:20]=[CH2:21])([CH3:19])[C@@H:15]([OH:18])[C@H:16]([CH3:17])[C@:5]3([C@@H:10]2[C:8](=[O:9])[CH2:7][CH2:6]3)[CH2:4][CH2:3]1.C(N(CC)CC)C.[CH3:35][S:36](Cl)(=[O:38])=[O:37].O>ClCCl>[CH3:1][C@H:2]1[C@:11]2([CH3:27])[C@@H:12]([O:22][C:23]([CH2:25][O:26][S:36]([CH3:35])(=[O:38])=[O:37])=[O:24])[CH2:13][C@@:14]([CH:20]=[CH2:21])([CH3:19])[C@H:15]([OH:18])[C@@H:16]([CH3:17])[C@@:5]3([C@@H:10]2[C:8](=[O:9])[CH2:7][CH2:6]3)[CH2:4][CH2:3]1

Participants

Conditions

Temperature: -15 °C

Procedure

Pleuromutilin (222.0 g, 0.59 mol) was dissolved in dichloromethane (2.25 L) under nitrogen and triethylamine (92 mL, 66.45 g, 0.66 mol) was added at ambient temperature over 15 min, during which time a slight exotherm (16.5 to 18.5° C.) was observed. After stirring for 30 min the solution was cooled to −15° C. over 20 min. A solution of methane sulphonyl chloride (52 mL, 77.5 g, 0.68 mol) in dichloromethane (430 mL) was added over 1.28 h at −9 to −15° C. The mixture was left to stir in the ice/salt bath at ˜−9° C. initially. The mixture was stirred for a total of 1.5 h during which time it warmed up to 1° C. Deionized water (1.15 L) was added slowly while maintaining the temperature below 12° C. The mixture was stirred for 20 min and the phases separated. The dichloromethane phase (wt=3.70 kg) containing the title compound (267.8 g at 100% yield) was used directly in Step 5a.

Workup

waitThe mixture was left
stirringThe mixture was stirred for a total of 1.5 h during which time it
temperaturewarmed up to 1° C
temperaturewhile maintaining the temperature below 12° C
stirringThe mixture was stirred for 20 min
customthe phases separated

Sources & evidence

ORD record: ord-1d7a49d06f384ecfb78ea3556c9b2de7
Source dataset: uspto-grants-2011_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07875630B2

Reaction notes

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