摘要:

The alkaloids from forest vines endemic to eastern Australia, vizStephania bancroftiiF. M. Bailey andS. aculeataF. M. Bailey (Menispermaceae) have been examined. The major alkaloids in the tuber of the former species are (-)-tetrahydropalmatine and (-)-stephanine, whereas these are minor components in the leaves, from which we have characterised a C-7 hydroxylated aporphine. The major tuber alkaloids inS. aculeataare (+)-laudanidine and the morphinoid, (-)-amurine whose X-ray structure is presented.

ISSN:1057-5634    

DOI:10.1080/10575639308043881

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

Hetero Diels-Alder reaction of diene7, obtained in four steps from aldehyde4, with Troc-NO8produced the dihydro-2H-1,2-oxazine9in 48% yield. Conversion of this intermediate to the N-deprotected tosylate10followed by ring closure gave the bicyclic product11which was converted to the indolizidine derivative13by N‒O bond cleavage (H2, RaNi) and recyclization under Mitsunobu conditions. Final deprotection of13with mild acid gave the target triepicastanospermine analog3.

ISSN:1057-5634    

DOI:10.1080/10575639308043882

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue.

ISSN:1057-5634    

DOI:10.1080/10575639308043870

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor