Acid has little or no effect except possible exchange of acid groupd between ester and the introduced acid - transesterification. Base - a salt of the acid part of the ester will form and the alcohol or some substituted form of it - that depends on the base used. There is no simple answer as the acids and bases that could be used are almost limitless.
You will form the carboxylic acid and an alcohol.
Ester formation and degradation follows this simple rule:
Carboxylic acid + alcohol --> ester
RCOOH + ROH --> RCOOR +H2O
By drying out the ester samples with heat or vacuum, water will leave and will pull the reaction towards enriching the ester product. On the other hand, the reverse reaction can occur by adding more water. It will degrade the ester by nucleophilic attack of water - first creating a tetrahedral intermediate followed by kicking off the alcohol as its leaving group.
The products are a carboxylic acid and an alcohol but reaction is reversible therefore ester and water are also present.
saponification
The reaction of an acid and a base forms a salt and water. If the acid or base is an organic compound, the organic salt is called an ester.
SAPONIFICATION
oxidation
ethyl ethanoate
Benzyl salicylate is an ester.
The reaction of an acid and a base forms a salt and water. If the acid or base is an organic compound, the organic salt is called an ester.
SAPONIFICATION
ethyl ethanoate
oxidation
The amino group of glycine methyl ester hydrochloride reacts with the double bond of acrylonitrile, it occurs the Michael reaction, then generates CNCH2CH2NHCH2CO2Me.
Benzyl salicylate is an ester.
Dimer of your boronate ester/acid
ester
The parent carboxylic acid and the parent alcohol can be obtained by hydrolysis of an ester. Hydrolysis is a reaction in which a molecule is split up by the chemical action of water. The breakdown of an ester is an example of hydrolysis because water is used to separate the ester into alcohol and a carboxylic acid.
The nucleophilic oxygen in the alcohol can attack the carbonyl carbon of the aldehyde to form an ester. This reaction can be carried out under acidic conditions.
Forms an Ester, Condensation reaction Pentyl Methanoate + Water
ester