Treatment of model compounds

Treatment of Model Compounds. As anticipated, each of the sulfur-containing model compounds were recovered quantitatively after their exposure to the micronization, acid treatment and floatation processes used in coal and maceral preparation. In all cases the proton and carbon-13 NMR spectra, the FTIR spectra and the melting points of the recovered materials matched those of the starting materials, indicating that these sulfur species remain unchanged during the processing. 

As part of a biomimetic approach to the synthesis of the manzamine alkaloids, Baldwin et al. found that treatment of model compound 120 in pH buffer 8.3 for 18 h followed by reduction with excess sodium borohydride gave the adduct 121 in low yield (Figure 3.5) [71]. 

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