Trifluoroacetic acid → Ethyl 6-ethyl-3,4-dihydro-5-hydroxy-4-oxothieno[2,3-d]PYRIMIDINE-2-CARBOXYLATE

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

The diazonium fluoroborate salt is prepared as in Procedure 63 from the amino compound produced in Procedure 51 yielding 0.03 mole of the required idazonium fluoborate. The latter is added in one portion to a solution of 0.03 mole of potassium trifluoroacetate in 13 ml. of trifluoroacetic acid at 0° C. The mixture is stirred at 25° C. for 1 hour and then refluxed overnight. The trifluoroacetic acid is evaporated in vacuo to give a residue which is triturated with water and filtered to give the desired product.

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