Sigmasterol

By far the most widely used starting material for side chain elaboration schemes has been the C-22 aldehyde. This compound, readily obtained from the ozonolysis of sigmasterol i-ether or the 4-phenyl-l, 2,4-triazoline-3,5-dione (PTAD)-diene adduct of ergosterol has been modified in a number of ways. 

Increases in the price of cocoa butter have led to a search for alternative fats for use in manufacturing chocolate. Biino and Carlisi suggested determining illipe butter in cocoa butter blends by measuring the sigmasterol/campesterol ratio and the POS/POP and SOS/POP triglyceride ratios. 

Figure 4. P-Sitosterol (sitosterin. 8) sigmasterol (9) and campesterol (10) from roots of...

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