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Sustainable Chemical Processes
Fig. 4 | Sustainable Chemical Processes

Fig. 4

From: Butadiene sulfone as ‘volatile’, recyclable dipolar, aprotic solvent for conducting substitution and cycloaddition reactions

Fig. 4

1H NMR of 1-benzyl-5-p-toluenesulfonyl tetrazole (2). The purity of the isolated tetrazole obtained using the purification scheme outlined in Fig. 3 is compared to the isolated tetrazole product obtained via traditional purification techniques. a cheletropic switch, followed by extraction and b column chromatography. Peak labelled asterisk corresponds to d-DMSO and peak labelled double asterisk corresponds to water

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