Michael Benn

An enantioselective synthesis of (+)-crotanecine

Synthese a partir de (2S,4R)-hydroxy-4 proline via la (1S,5R,8R)-hydroxy-8 oxa-2aza-6 bicyclo [3.3.0] octanone-3

Further Norditerpenoid Alkaloids from Delphinium nuttallianum

A study of the minor bases of D. nuttallianum resulted in the isolation and identification of eight known and five new diterpenoid alkaloids

The Natural Occurrence and Partial Synthesis of 1a,4(S),6b,14a,16b-19,20-Didehydro-1,6,14,16-tetramethoxy-4-[[[2-(3-methyl-2,5-dioxopyrrolidinyl)benzoyl]oxy]methyl]aconitane-7,8-diol; concerning Anhweidelphinine

The title compound, alkaloid-Y, which is probably identical with anhweidelphinine, was isolated from Delphinium nuttalianum and its structure was proven by its conversion into methyllycaconitine, and also by its preparation from that alkaloid

Norditerpenoid alkaloids from Delphinium menziesii DC

An investigation of the alkaloids of Delphinium menziesii resulted in the isolation and identification of eleven norditerpenoid alkaloids, of which ten were known and one was new: the latter, named delmenzine, corresponded to 1-O-desmethyldelelatine