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One-pot synthesis of N-Unprotected azacyclopentylidene complexes from their oxa analogues

✍ Scribed by Wilm-Christian Haase; Karl Heinz Dötz


Book ID
104261179
Publisher
Elsevier Science
Year
1999
Tongue
French
Weight
97 KB
Volume
40
Category
Article
ISSN
0040-4039

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✦ Synopsis


N-Unprotected azacyclopentylidene complexes of chromium and tungsten have been prepared from their oxacyclopentylidene analogues in a tandem aminolysis/Mitsunobu recyclization reaction.


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Oxalic acid as a versatile catalyst for
✍ Jaiprakash N. Sangshetti; Devanand B. Shinde; Nagnnath D. Kokare 📂 Article 📅 2008 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 242 KB 👁 2 views

## Abstract magnified image 3,4‐Dihydropyrimidin‐2‐(1__H__)‐ones and their thione analogues are synthesized from the condensation of aromatic aldehydes, β‐dicarbonyl compound and urea or thiourea in presence of 5 mol% of oxalic acid in ethanol‐water (1:2; v/v) under mild reaction conditions. The y