Journal
ORGANIC & BIOMOLECULAR CHEMISTRY
Volume 12, Issue 25, Pages 4397-4406Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ob00515e
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Funding
- Kurata Grant, Memorial Hitachi Science and Technology Foundation
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Organic azides were prepared from primary amines in high yields by a metal free diazo-transfer reaction using 2-azido-1,3-dimethylimidazolinium hexafluorophosphate (ADMP), which is safe and stable crystalline. The choice of base was important in the diazo-transfer reaction. In general, 4-(N,N-dimethyl)aminopyridine (DMAP) was efficient, but a stronger base such as alkylamine or DBU was more appropriate for the reaction of nucleophilic primary amines. X-ray single crystal structural analysis and geometry optimization using density functional theory (B3LYP/6-31G**) were conducted to study the ADMP structure, and the diazo-transfer reaction mechanism was explained with the help of the results of these analyses.
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