Synthetic Communications p. 3109 - 3114 (1994)
Update date:2022-08-05
Topics:
Kim
Wilson
Haseltine
Hexahydropyrimidopyrimidine 3 is condensed with an alkyl ditosylate 4 at room temperature in DME or toluene. The resulting tricyclic salt is reduced with sodium borohydride to provide orthoamides 6a-c. Acidic hydrolysis of these orthoamides gives the corresponding macrocyclic triamines 8a-c in high yield.
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