Molecules 2012-01-01

Synthesis of 9,9'-[1,2-ethanediylbis(oxymethylene)]bis-2-amino-1,9-dihydro-6H-purin-6-one, an impurity of acyclovir.

Rosa M Suárez, Maria Paz Matía, José Luis Novella, Andres Molina, Antonio Cosme, Juan José Vaquero, Julio Alvarez-Builla

Index: Molecules 17(8) , 8735-41, (2012)

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Abstract

The synthesis of 9,9'-[1,2-ethanediylbis(oxymethylene)]bis-2-amino-1,9-dihydro-6H-purin-6-one, a minor impurity of acyclovir, is described. Starting with commercial N-(9-acetyl-6-oxo-1H-purin-2-yl)acetamide, the process uses an acid catalysed phase transfer catalysis (PTC) process to produce the selective alkylation at the 9 position of the guanine ring.