Application of chloroaluminate ionic liquid
1033
carboxylic acid was obtained by recrystallization or dis-
1
tillation. All the products were characterized by IR and H
20. Wasserscheid P, Keim W (2000) Angew Chem 112:3926
21. Wasserscheid P, Keim W (2000) Angew Chem Int End 39:3773
2
2
2. Castro CAN (2010) J Mol Liq 156:10
3. Wasserscheid P, Welton T (2003) Ionic liquids in synthesis.
Wiley-VCH, Weinheim
NMR, and their melting points were in agreement with
reference values [32–36, 52].
Caution: The by-products of the dealkylation of methyl
esters in ionic liquid 1 and 2–4 are MeBr and MeCl,
respectively. They are powerful alkylating agents and
hence toxic: contact with skin and inhalation must be
avoided. Therefore, work with this transformation should
be carried out in an efficient fumehood with wearing pro-
tective gloves.
24. Souza RF, Suarez PAZ (2002) Chem Rev 102:3667
2
5. Huddleston JG, Williams HD, Swatloski RP, Visser AE, Rogers
RD (1999) Chem Commun 35:1765
6. Sheldon R (2001) Chem Commun 37:2399
2
27. Adams CJ, Earle MJ, Roberts G, Seddon KR (1998) Chem
Commun 34:2097
2
2
3
3
8. Holbrey JD, Seddon KR (1999) Clean Prod Process 1:223
9. Zhang S, Zhang Q, Zhang ZC (2004) Ind Eng Chem Res 43:614
0. Esser J, Wasserscheid P, Jess A (2004) Green Chem 6:316
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Acknowledgments We are grateful to the Nature Science Founda-
tion of Hubei Province (No. 2007ABA279) and Foundation of Hubei
Educational Commission (No. B20111702) for financial support.
32. Chakraborti AK, Roy SR, Kumar D, Chopra P (2008) Green
Chem 10:1111
3
3. Sarkar A, Roy SR, Chakraborti AK (2011) Chem Commun
7:4538
4. Roy SR, Chakraborti AK (2010) Org Lett 12:3866
5. Chakraborti AK, Roy SR (2009) J Am Chem Soc 131:6902
6. Jitender MK, Sanjay K (2010) Monatsh Chem 141:561
7. Jhillu SY, Basi VSR, Maddi SR, Namelikonda N, Attaluri RP
4
3
3
3
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