Abstract
Difluoromethyldiphenylphosphine oxide ( 5 ) was synthesized from chlorodifluoromethane and diphenylphosphine oxide. Reaction of 5 with a variety of ketones and aldehydes gave 1,1-difluoroolefins. Monofluoromethyldiphenylphosphine oxide ( 7 ) was also synthesized but did not give monofluoroolefins.
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