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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 892666Generated: October 31, 2026

Dimethyl Sulfide → 4,8,8-Trimethyl-1-oxaspiro[2.5]oct-4-ene

https://huagongshe.com/reaction/892666

Reaction equation

Participants

RoleNameHCIDCharge
ReactantDimethyl SulfideHCID 1068—
ReactantDimethyl SulfateHCID 6497—
ReactantSodium HydroxideHCID 14798—
Reactant2,6,6-Trimethyl-2-cyclohexen-1-oneHCID 88332—
SolventDimethyl SulfoxideHCID 679—
Product4,8,8-Trimethyl-1-oxaspiro[2.5]oct-4-eneHCID 1176877173%

Reaction Steps

Prepared under the conditions described in a., starting from 25.0 g (181 mmol) of 2,6,6-trimethyl-2-cyclohexen-1-one, 31.9 g (253 mmol) of (CH3)2SO4, 17.0 g (274 mmol) of (CH3)2S and 43.0 g (1086 mmol) of NaOH in 60 ml of DMSO. 22.09 G of the desired product, 91% pure, were obtained.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS05118865
Source datasetuspto-grants-1992_06
ORD IDord-6e174837e8974c6b9cde3b4b240f3875
Source noteuspto-grants-1992_06