Capuronetta

In addition to monomeric capuronine (159), capuronidine (170), and other dimeric alkaloids, Husson et al. isolated from T. capuronii (Capuronetta ele-... 

Anacampta spp. have usually been published as Tabernaemontana spp., as have been species originally published as part of the Genera Bonafousia, Capuronetta (which has become the species capuronni under this Genus), Conopharyngia,... 

The reduction of capuvosidine (191) to an indole derivative by means of sodium borohydride in methanol solution98c has now been reported,1126 and the product is indeed deoxycapuvosine (192) this completes the interconversion of the alkaloids of this group from Pandaca boiteaui and Capuronetta elegans. Further evidence in support of the 3 -ll attachment of the monomer units in these alkaloids has also been provided.1126... 

The third alkaloid of Capuronetta elegans, capuvosine (225), is a bisindole alkaloid of new type in which a vobasine unit is attached to one of dihydrocleavamine type. Indeed, fission of capuvosine by means of hydrochloric acid results in the formation... 

The Gif sur-yvette group has examined the Madagascan plant Capuronetta elegans Mgf. (Apocynaceae) and obtained a number of interesting alkaloids, two of which are biogenetically very closely related (107). 

Unfortunately, the reduction of the indolenine unit in capuvosidine to an indole derivative by means of sodium borohydride in protic solvents (c/. 1,2-dehydroaspidospermidine quebrachamine) was not reported if C-20 has the (R) configuration, as shown in (274)," the product would have been deoxy-capuvosine (271). The relevance of this transformation stems from the report that (-)-(20J )-deoxycapuvosine (271) and capuvosidine, identical with the bases obtained from Capuronetta elegans, also occur in Pandaca boiteaui capuvosidine from this source is described, however, as (-)-(20S)-capuvosidine, i.e. the 20-epimer of (274), but without supporting evidence. Other bases present in... 

---