Arbusov reaction of alkyl α-phosphoranylideneamino-α-alkenoates with several halides gave the corresponding α-phosphinylamino-α-alkenoates and Δ2-dehydrodipeptide derivatives.
α,β-Unsaturated Carboxylic Acid Derivatives. XXI A Novel Synthesis of α-Dehydroamino Acid Derivatives by the Arbusov Reaction of α-Phosphoranylideneamino-2-alkenoates
The reaction of ethyl 2-azido-2-alkenoate with organic tervalent phosphorus reagent gave the corresponding 2-phosphoranylideneamino derivative as an stable intermediate. This transformed gradually at room temperature, or immediately on a silica-gel column to give the corresponding 2-phosphinylamino derivative in a good yield. The Arbusov reaction of the intermediate which occurred during the transformation
A new useful method for the synthesis of dehydropeptide by the reaction of L-leucyl chloride with α-triethoxyphosphinimino-α-alkenoic acids, derived from ethyl α-azido-α-alkenoates and triethylphosphite, is described.