ABSTRACT
ABHILASHA JAIN, RITU VYAS, AARTI AMETA, and P. B. PUNJABI
7.1 Introduction .................................................................................. 162 7.2 Some Major Green Solvents ........................................................ 162
7.2.1 Water ................................................................................ 162 7.2.2 Polyethylene glycol (PEG) .............................................. 173 7.2.3 Glycerol ........................................................................... 178 7.2.4 Cyclopentyl Methyl Ether (CPME) ................................. 182 7.2.5 2-Methyltetrahydrofuran (2-MeTHF) .............................. 188 7.2.6 Perfluorinated (Fluorous) Solvents .................................. 192
Keywords .............................................................................................. 194 References ............................................................................................. 195
7.1 INTRODUCTION
Organic solvents are commonly used in organic syntheses and these are the major sources of generated wastes. These solvents are volatile, flammable and hazardous to human beings and the environment. There are two main approaches to solve the problems caused due to these solvents. In the first approach, the solvent is not used altogether. Many reactions can be carried out under the ‘neat’ conditions. But in solvent free techniques, many reactions are not possible and many reagents and intermediates are not stable outside the solution.
