3P-Hydroxytropane

Simple tropanes (Tl) Tl-A = Tropan-3-one (tropinone), 3a-hydroxytropane (tropine), 3P-hydroxytropane (pseudotropine), and/or their nor derivatives (for details see Table 3.9) Tl-B = Calystegines (polyhydroxylated nortropanes for details see Table 3.9) Tl-C = Dihydroxynortropanes Tl-D = O-Acylated dihydroxynortropane (baogongteng A) Tl-E = 6P-Hydroxytropan-3-one Tl-F = Methylpseudoecgonine (2a-carbomethoxytropan-3P-ol) 3oc-Acyloxytropanes ... 

Simple and Prenylated Aromatic Esters of 3P-Hydroxytropane/- ortropane (T9). It is especially remarkable to notice that also alkaloids of this type often showed co-occurrence with the corresponding 3a derivatives (T3- and T4-type, respectively) and vice versa (Tables 3.5 and 3.6). In this connection it should be taken into account that simple and prenylated aromatic esters of 3a-hydroxytropane/-nortropane are the convolvulaceous counterpart to the solanaceous (3a-configu-rated) hyoscyamine/scopolamine-type alkaloids from the family-specific point of view. However, the Solanaceae do not produce 3P analogues of their specific tropanes whereas the occurrence of aliphatic esters of 3P-hydroxytropane/-nortropane besides the corresponding 3a metabolites is common also in this family. 

Esters of 3p-Hydroxytropane/- ortropane with Phenylpropanoid Acids (TIO). 

There is also evidence that those calystegine-positive species for which no analysis of the precursors have been carried out nevertheless use them, too Maripa panamensis unambiguously yielded esters of 3P-hydroxytropane (Table 3.6 thus, it may be assumed that this species is also able to synthesize 3P-hydroxytropane itself. Ipomoea involucrata as well as I. squamosa exhibited 3a-acetoxytropane... 

Table 3.2) thus, these species must synthesize 3-oxotropane because this is a precursor of 3a- as well as of 3P-hydroxytropane and their derivatives. 

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