Porella

Norbotryal acetate (451) has been identified as a co-metabolite of botrydial (452) in cultures of the plant pathogen Botrytis cinerea (cf. Vol. 6, p. 95 Vol. 7, pp. 105, 195). Further examination of the metabolites of Porella species has revealed the presence of the pinguisane derivative (453). It has been suggested that... 

A number of kauranoid diterpenoids have been isolated from the liverworts. (16i )-ent-Kauran-15-one, ent-15a-hydroxykaur-16-ene, and the corresponding 15-ketone have been isolated from the liverwort Jungermannia infusca and (16i )-ent-18-hydroxykauran-15-one, ent-kaur-16-en-18-oic acid, and ent- a-hydroxykaur-16-en-15-one have been found in another species, Porella densi-folia. The full paper on the crystal structure of enf-1 la,15or-dihydroxykaur-16-ene, which has been obtained from Jungermannia sphaerocarpa and Solenostoma trista, has appeared. ... 

Further studies on the metabolites of the liverwort Porella platyphylla have resulted in the isolation and structural determination of three more pinguisane-type sesquiterpenoids, namely pinguisanin (665), pinguisanolide (666), and /8-pinguisenediol (667). A very neat synthesis of the unusual sesquiterpenoid... 

Order 2.— Jungermanniales, the leafy liverworts, including Porella,... 

Besides the Drimys winteri, drimenol (2) was also found in many other natural sources [3, 4]. For example, it has been isolated from some species of the plants of the Warburgia [9] and Porella [10] families, from Polygonum hydropiper [11], some liverworts [12], Ferula ceratophylla [13] and fungi [14]. 

Oxoisodrimenin (136) has been isolated from Porella cordeana [90], though much earlier it had been synthesised on the Beckmann mixture... 

Bioactivity data of Porella cordeana extract and sesquiterpenoids. 

New additions to the guaiane family include sclerosporin (609), sclerosporal (610), sclerosporene (611), the guaienes (612) and (613) [which co-occurs with precatabrone (614)], and the guaioxide (615). The unusual pseudoguaiane caespitenone (616) has been isolated from the liverwort Porella caespitans This compound co-occurs with (-i-)-aristolone (617) and (-)-a-eudesmol (618), which are enantiomeric to those found in higher plants. 

A prenylated cadinene, biflora-4,10(19),15-triene (77), has been isolated from a termite soldier. Prenylated sesquiterpenoid structures have also been assigned to perrottetianal A (78) and B (79), which were isolated from Porella perrottetiana, and a further series of sacculatane diterpenoids including 18- and... 

Freitas, H., Brehm, A. (2001). Genetic diversity of the Macaronesian leafy liverwort Porella canariensis inferred from RAPD markers. The American Genetic Association 92, 339-345. 

Hentschei, J., Zhu, R.-L., Long, D.G. et ai. (2007). A phyiogeny of Porella (Porellaceae, Jungermarmiopsida) based on nuclear and chloroplast DNA sequences. Molecular Phylogenetics and Evolution 45,693-705. 

Pinguisanes occur in various species of liverwort, exemplified by (-)-a-pinguisene in Porella platyphylla. The name of this small group of sesquiterpenes stems from Aneura pinguis containing (+)-pinguisone its bitter taste protects as an antifeedant... 

Source Porella perrottetiana Mol. formula S0 30 2 Mol. wt. 302 Solvent CDC1 ... 

Hashimoto. T K. Shiki, M. Tanaka, S. Takaoka, and Y. Asakawa, 1998b. Chemical conversion of labdane-type diterpenoid isolated from the liverwort Porella perrottetiana into ( ) amhrox. 9 ... 

To obtain a large amount of ambrox (391), a deterrence, labda-12,14-dien-7a,8-diol obtained from the liverwort, Porella pettottetiana as a major component, was chemically converted into... 

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