Under what reaction conditions could you perform a crossed claisen reaction with an ester component that has only one alpha hydrogen

Basically, A condensation reaction occurs when two molecules join to form a larger molecule and release a smaller molecule(s) in the process. The smaller molecule lost in the reaction is often water, but it can also be methanol, hydrogen chloride, acetic acid or several other molecules.As a result  esters can contain α hydrogens they can undergo a condensation reaction similar to the aldol reaction called a Claisen Condensation

Explanation:

pie chart because it is in percents ( % )