New synthesis of 5-acyl-2-oxazolin-4-ones and of .beta.-keto-.alpha.-hydroxy acid amides from the reaction of 2,2,2-trialkoxy-2,2-dihydro-1,3,2-dioxaphospholenes with acyl isocyanates
New synthesis of 5-acyl-2-oxazolin-4-ones and of .beta.-keto-.alpha.-hydroxy acid amides from the reaction of 2,2,2-trialkoxy-2,2-dihydro-1,3,2-dioxaphospholenes with acyl isocyanates
New synthesis of 5-acyl-2-oxazolin-4-ones and of .beta.-keto-.alpha.-hydroxy acid amides from the reaction of 2,2,2-trialkoxy-2,2-dihydro-1,3,2-dioxaphospholenes with acyl isocyanates