Umpolung Chemistry Flashcards

1
Q

Umpolung meaning

A

Inverse polarity

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2
Q

Acyl anion equivalent

A

CN-

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3
Q

How to remove CN-

A

H+/H2O gives alcohol
H+/Alcohol gives corresponding ester

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4
Q

Nitro alkene

A

Soft nucleophile, acyl anion equivalent used for conjugated additions, unmasked to C=O using Nef Reaction = TiCL3 with water

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5
Q

Thioacetal

A

acyl anion eqivalent used for direct nucleophilic attack, added using LA catalysis and SHCH2CH2CH2SH and nBuLi converts to corresponding lithium reagent to be used

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