Direct conversion from alkenes to alkynes

Area of Science:

• Organic Chemistry
• Synthetic Chemistry

Background:

• Alkynes are crucial in organic chemistry, but their synthesis from alkenes is challenging.
• Existing methods rely on harsh elimination chemistry, limiting their use with complex molecules.

Purpose of the Study:

• To develop a mild and versatile method for alkene desaturation to alkynes.
• To enable late-stage synthesis of complex alkynes and control alkene stereochemistry.

Main Methods:

• Utilized a recyclable selenanthrene reagent for alkene desaturation.
• Demonstrated compatibility with various leaving groups and sensitive functional groups.

Main Results:

• Achieved efficient conversion of alkenes to alkynes under mild conditions.
• Enabled stereochemical inversion or sorting of Z/E alkenes, a feat not possible with prior methods.
• Showcased broad functional group tolerance for late-stage synthesis.

Conclusions:

• The developed selenanthrene reagent offers a mild and efficient alternative for alkyne synthesis.
• This method expands synthetic possibilities for complex molecules and stereochemical control.
• The reagent's recyclability enhances its practical and sustainable application in organic synthesis.