CONCEPT: USE OF PROTECTING GROUPS Organometallics are ...

0 downloads 142 Views 182KB Size Report
Organometallics are powerful bases. They will react with any acidic protons available, ruining the reagent. We can use t
CONCEPT: USE OF PROTECTING GROUPS

□ Organometallics are powerful bases. They will react with any acidic protons available, ruining the reagent.

We can use tert-butyl or silyl ethers to protect alcohols from deprotonation by organometallic reagents ● p-Toluenesulfonic acid is an acid commonly used for this step (abbrev. TsOH or pTSA)

EXAMPLE: Provide the mechanism and final product for the following transformation