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Polyhalogenated methyl ethyl ethers: solubilities and anesthetic properties
D D Koblin1, M J Laster, P Ionescu
1Department of Anesthesia, Veteran's Administration Hospital, San Francisco, California, USA.
Anesthesia and Analgesia
|May 13, 1999
Summary
Researchers studied 27 polyhalogenated methyl ethyl ethers to understand anesthetic potency. Some ethers showed anesthetic effects, while others caused excitation, highlighting the complexity of inhaled anesthetic mechanisms.
Area of Science:
- Anesthesiology
- Medicinal Chemistry
Background:
- Potent inhaled anesthetics are typically halogenated ethers.
- Understanding structure-activity relationships is crucial for developing new anesthetics.
Purpose of the Study:
- To investigate the anesthetic potency of 27 polyhalogenated methyl ethyl ethers.
- To correlate structural and physical properties with anesthetic efficacy.
Main Methods:
- Determined minimum alveolar anesthetic concentration (MAC) in rats for 22 novel compounds.
- Conducted additivity studies with desflurane for ethers lacking anesthetic effects alone.
- Measured MAC values and oil/gas partition coefficients.
Main Results:
- MAC values were obtained for 20 of 22 ethers, with MAC x oil/gas partition coefficient products ranging from 1.27 to 18.8 atm.
- Two ethers (CCIF2OCCIFCF3 and CCIF2OCF2CClF2) exhibited excitatory properties and no anesthetic effect.
- Anesthetic potency correlated with both polar and nonpolar properties.
Conclusions:
- Polyhalogenated methyl ethyl ethers possess unique characteristics relevant to anesthetic development.
- These compounds offer insights into the mechanisms of inhaled anesthetics.
- Further research into these structural analogs may advance anesthesiology.