Methanesulfonyl chloride → (R)-N-(methylsulfonyloxy)-1,4-dioxaspiro[4.5]decane-2-carbimidoyl chloride

HRID 1511090Notes

Reaction equation

[OH:1][N:2]=[C:3]([Cl:14])[C@H:4]1[CH2:8][O:7][C:6]2([CH2:13][CH2:12][CH2:11][CH2:10][CH2:9]2)[O:5]1.[CH3:15][S:16](Cl)(=[O:18])=[O:17]>C1COCC1>[CH3:15][S:16]([O:1][N:2]=[C:3]([Cl:14])[C@H:4]1[CH2:8][O:7][C:6]2([CH2:13][CH2:12][CH2:11][CH2:10][CH2:9]2)[O:5]1)(=[O:18])=[O:17]

Participants

Conditions

Temperature: 3 °C

Procedure

In a 4 neck 5 L flask was added (R)-N-hydroxy-1,4-dioxaspiro[4.5]decane-2-carbimidoyl chloride (158 g, 719 mmol) in 2.5 L of THF. The material was cooled to 3° C. and methanesulfonyl chloride (56.1 ml, 719 mmol) added in 10 mL portions over 10 minutes. N-ethyl-N-iospropylpropan-2-amine (126 ml, 719 mmol) was added through an addition funnel over 12 minutes. The reaction was stirred in an ice bath for 30 minutes and then at ambient temperature for 1 hour. The reaction was filtered and the solids washed with MTBE (3 L). The filtrate was concentrated and the residue was purified over silica gel (3 kg silica, 7:1 to 3:1 Hexane/EtOAc) to afford an oil that slowly solidified under vacuum. The solids were ground using a mortar and pestle, washed with hexanes (about 1000 mL) and dried to afford (R)-N-(methylsulfonyloxy)-1,4-dioxaspiro[4.5]decane-2-carbimidoyl chloride (158 g, 531 mmol, 73.8% yield) as a white solid.

Workup

waitat ambient temperature for 1 hour
filtrationThe reaction was filtered
washthe solids washed with MTBE (3 L)
concentrationThe filtrate was concentrated
customthe residue was purified over silica gel (3 kg silica, 7:1 to 3:1 Hexane/EtOAc)
customto afford an oil that
washwashed with hexanes (about 1000 mL)
customdried

Sources & evidence

ORD record: ord-85335279f3924ee78b7854b79f8ede5d
Source dataset: uspto-grants-2012_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08212045B2

Reaction notes

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