OXALYLCHLORIDE/DMF FOR NITRATION
983
reaction times are reduced from several hours to only 2–3 min 18. (a) 18 Rajanna, K.C.; Abdulla; Amina, S.; Arun Kumar, Y.; Arifuddin, M.
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accompanied by yield enhancements (Table 2). The ability to
rapidly heat reactions significantly above the boiling point of
the solvent has resulted in dramatic decreases in reaction times
and increases in reaction yields for a variety of chemical trans-
1
2
2
formations.[
34,35]
CONCLUSION
In this proposed protocol, we developed iminium salt
3
055–3048.
(
oxalylchloride/DMF) mediated nitration reaction of aromatic 22. (a) Ramgopal, S.; Ramesh, K.; Chakradhar, A.; Reddy, N.M.; Rajanna,
compounds and nitro decarboxylation of cinnamic acids under
sonication and microwave irradiation. Microwave and ultrason-
ically assisted reactions not only reduced the reaction times re-
markably but also enhanced the yield of products from good to
excellent as compared to those of normal protocol. The presently
K.C. Metal nitrate driven nitro Hunsdiecker reaction with α, β-unsaturated
carboxylic acids under solvent-free conditions. Tetrahedron Lett. 2007, 48,
4
043–4045. (b) Satish Kumar, M.; Venkanna, P.; Ramgopal, S.; Ramesh,
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(
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