Piper regnellii

Fig. 12.10 Enantioselective formation of neolignans in Vinca rosea and Piper regnellii...

Another example of the enzymatic enantioselective formation of a C8-C5 neolignan was reported. A crude enzyme preparation from Piper regnellii catalyzed the enantioselective formation of (+)-conocarpan (85% e.e.) from j9-anol (Fig. 12.10) [67],... 

SartorelU P, Benevides PJC, EUensohn RM et al (2001) Enantioselective conversion of p-hydroxypropenylbenzene to (-l-)-conocarpan in Piper regnellii. Plant Sci 161 1083-1088... 

In vitro antioxidant activity was also evaluated in Piper regnellii, another plant from the Piperaceae family commonly used as it were P. umbellata. The activity of the extracts was evaluated in spontaneous lipid peroxidation of brain homogenates, and both TBARS and chemiluminescence were employed as parameters for lipid peroxidation evaluation. Although P. regnellii showed some antioxidant capacity, this was below that of P. umbellata, probably due to the absence of 4-nerolidylcatechol in the former. 

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See also in sourсe #XX -- [ , ]

See also in sourсe #XX -- [ ]

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