I. Ralph C. Bick

Athrotaxis alkaloids. Part II. Alkaloids of a. selaginoides and a. laxifolia

Abstract The taxodeaceous plant A . Selaginoides contains six known homo erythrina -type alkaloids and selaginoidine, which has a furan ring replacing the benzene ring of the latter type. Selaginoidine and five of the six above-mentioned alkaloids also occur in A. laxifolia .

Aristotelinone and serratoline: New indole alkaloids from Aristotelia serrata W.R.B. Oliver

Abstract Aristotelinone and serratoline, two new Aristotelia alkaloids, are shown to have indole and indolenine structures respectively from their spectra and reduction products.

Athrotaxis alkaloids. Part I. Alkaloids of A. Cupressoides

Abstract Eleven homoerythrina-type alkaloids ( tilda1 - tilda9 , tilda11 , tilda12 ) have been isolated from A. cupressoides (Taxodiaceae), of which six ( tilda6 - tilda9 , tilda11 , tilda12 ) had not previously been reported.

Alkaloids of peripentadenia mearsii. II: Minor bark alkaloids

Abstract The structures of the three minor alkaloids dinorperipentadenine, peripentamine and anhydroperipentamine have been established as til2 , til5 , and til6 respectively.

Assignment of the structure of dihydrodaphnine diacetate by nuclear Overhauser effect difference spectroscopy

Abstract The structure of the title compound has been resolved using a recent pulsed nmr difference technique to measure small nuclear Overhauser effects between aromatic protons and O- and N-methyl groups.

Aristomakine, a novel indole alkaloid from aristotelia serrata

Abstract The isolation and structural determination of aristomakine (I), an unusual indole alkaloid with an N-isopropyl group, is reported.

The alkaloid peduncularine: Corrected spectroscopic data and conformational analysis

Abstract The reported spectroscopic data for the alkaloid peduncularine from Aristotelia peduncularis have been revised and its preferred conformation has been investigated using NOE difference spectroscopy.

Aristofruticosine, a novel indole alkaloid from Aristotelia Fruticosa

The isolation and structural determination of aristofruticosine (1), an alkaloid with a unique 3-azatricyclo[3.3.1.03,7]nonane nucleus, is described.

Somniferine, a novel dimeric opium alkaloid

Abstract A new class of dimeric alkaloid has been isolated from opium poppies grown in Tasmania, and the structure and absolute stereochemistry of the first two, somniferine (1) and its O-methyl ether (2) have been established by spectroscopic means.

Homoerythrina and Related Alkaloids

The number of known homoerythrina alkaloids has doubled since the field was last reviewed in 1981 by Dyke and Quessy (1). Apart from their general survey, the first covering the homoerythrina bases and including also Erythrina and Cephalotaxus alkaloids, occasional reports describing developments in the field have appeared (2–10,57,58).