How is 2-Chloro-2,2-difluoroacetamide (CAS: 354-28-9) typically synthesized?

2-Chloro-2,2-difluoroacetamide is typically synthesized by the addition of hydrogen chloride to 2,2-difluoroacetaldehyde followed by hydrolysis. This process involves the use of a phase transfer catalyst and requires precise control of reaction conditions to achieve high yield and selectivity. The reaction is exothermic, and appropriate cooling may be necessary to prevent side reactions.