Question

Which best explains why an acetal can be used as a protecting group for carbonyls during a Grignard readion (A) The acetal is stable in acid. (B) The acetal prevents reaction of the carbonyl with a strong nucleophile. (C) The reaction is reversible and the acid helps to generate more product (D) To increase the electrophilic nature of the ketone since the Grignard is a weak nucleophile 0909

Answer 1

UWhich best explains why an acetell can be used as protecting groups for caahany's during Guignard reacties? Answer: -.9 |B] The acetall prevents reaction of the cashany with strong nucleophile. Acetell protect the Ketone and prevent |_reduction of ketene during Golgodod zecction 22 Select reagents needed for synthesis of parentyd bútanocete by Fischer Esterification I pentyl ett butanocite Answer:- B (B) Pentapol and butaroic acid. In fischox_Esterificeetries, Estes Koormed contain alcoholic polot from alcohol and acidic part from acid A Here celcoholic part is pentys chich must be come from pentahol and acidic -past is butanoic acid which must be comes from butanoic acid

using the 3) What is the product after sequence below, ? o n 1.H26oon, ??? h 2- PBrat 3. sodium acetate Answes B) B) Anhydside The secretion proceed as below. an insong you - J PBrz Grote Na BAC xy Br Anhydride 41 Which sbucture does not produces a racemic mixture when reduced with excess LAH? Answer III III) because this compound is bematepice Hometopic compound not produce racemie mixture as it do not able to produce emben Homessa