Purely organic catalysts phase-transfer reactions

Purely organic catalysts (Continued) electrochemistry, 342 hydrogen-bonded associates, 328 phase-transfer reactions, 333 photochemistry, 341 polymerization, 332... 

A multitude of other organic reactions imply the utilization of inorganic reagents insoluble in regular organic solvents. These reactions became viable owing to the use of new and unusual catalysts, such as 17, which are usually referred to as phase transfer catalysts. The ramifications of phase transfer phenomena are numerous and some of the most important will be discussed later in Section 4.2. For the moment we see that the solution of a purely technical problem resulted in a tremendous enrichment of the synthetic arsenal by broadening the applicability of old and well-known reactions. 

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