Synthesis and Transformations of Heterocyclic Compounds under the Influence of Microwave Radiation. (Review)

Abstract

Published data on the synthesis and transformations of heterocyclic compounds with microwave treatment are analyzed and classified according to the types of products formed. The results of analogous reactions conducted with normal heating are given for comparison.

Microwave-assisted synthesis of cyclopentyltrisilanol (c-C5H9)7Si7O9(OH)3

“…The IR spectrum was measured by means of a Bio-Rad FTS 165 spectrometer. 13 C NMR and 1 H NMR spectra were measured on a Varian Mercury-VX NMR spectrometer ( 13 C, 75 MHz, 1 H, 300 MHz). Elemental analyses were performed using a Perkin-Elmer 2400 elemental analyzer.…”

“…Main advantages of microwave heating derive from the almost immediate ''in core" heating of materials, in an homogeneous and selective manner, especially those with poor heat conduction properties [12]. Microwave heating has attracted the attention of investigators in that it makes it possible to shorten significantly the length of reactions, to increase their selectivity, and to increase the product yields, which is particularly important in the case of high-temperature processes that take a long time [13].…”