Accession Number:

ADA071204

Title:

Gem-Difluoroallyllithium: Preparation by the Transmetalation Procedure and some Reactions.

Descriptive Note:

Technical rept.,

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF CHEMISTRY

Personal Author(s):

• Seyferth,Dietmar
• Wursthorn,Karl R.

Report Date:

1979-06-28

Pagination or Media Count:

23.0

Abstract:

3,3-Difluoroallyltrimethyltin has been prepared by the reaction of beta-trimethylstannylethylidenetriphenylphosphorane with chlorodifluoromethane. This tin compound reacts with n-butyllithium in tetrahydrofuran at -95 C to generate gem-difluoroallyllithium. The latter, however, is not stable in solution at that temperature. If generated in situ in the presence of a triorganochlorosilane, products of type R3SiCF2CH-CH2 are obtained in good yield. Addition to the CO bond of 3-pentanone to give C2H52COHCF2CHCH2 was achieved by the method of altnerate, incremental additions. Author

Descriptors:

• *SYNTHESIS(CHEMISTRY)
• *ORGANOMETALLIC COMPOUNDS
• *PROPENES
• *LITHIUM COMPOUNDS
• *FLUORINE COMPOUNDS
• CHEMICAL REACTIONS
• SILANES
• TIN COMPOUNDS

Subject Categories:

• Organic Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE