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Two Directions of the Reaction of 4-Bromobenzaldehyde with Substituted Acetophenones and Urea. Synthesis of Aryl-substituted Pyrimidin-2-one and Hexahydropyrimido[4,5-d]pyrimidin-2,7-dione

✍ Scribed by V.F. Sedova; O.P. Shkurko


Book ID
111577778
Publisher
Springer US
Year
2004
Tongue
English
Weight
254 KB
Volume
40
Category
Article
ISSN
0009-3122

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Synthesis and structural study of novel
✍ Rená Rodríguez; Margarita Suárez; Estael Ochoa; Beatriz Pita; Remberto Espinosa; 📂 Article 📅 1997 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 380 KB 👁 1 views

## Abstract The tide compounds 4a‐c have been prepared in a one‐step procedure from 2,4‐diamino‐6‐hydroxy‐pyrimidine (1) and the corresponding arylidene substituted Meldrum's acids 2a‐e in very good yields. Semiempirical theoretical calculations (AMI) reveal two favoured conformations (A and B) for