Synthesis and biological activities of degraded limonoids, (±)-fraxinellonone and its related compounds
摘要:
The first synthesis of (+/-)-fraxinellonone and its short step conversion into (+/-)-fraxinellone and (+/-)-isofraxinellone is described. The synthesized compounds exhibited moderate insect-antifeeding activity against Spodoptera exigua H. (Boisduval) and ichthyotoxicity against killifish. Copyright (C) 1996 Elsevier Science Ltd
Short and Efficient Total Synthesis of Fraxinellone Limonoids Using the Stereoselective Oshima−Utimoto Reaction
作者:Stéphane Trudeau、James P. Morken
DOI:10.1021/ol0522687
日期:2005.11.1
[reaction: see text] The catalytic diastereoselective Oshima-Utimoto reaction was employed for the construction of fraxinellone and related members of this limonoid family of natural products. After formation of the five-membered lactone, a stereoselective aldol reaction and olefin metathesis established the bicyclic ring system in the natural products.
The first synthesis of (+/-)-fraxinellonone and its short step conversion into (+/-)-fraxinellone and (+/-)-isofraxinellone is described. The synthesized compounds exhibited moderate insect-antifeeding activity against Spodoptera exigua H. (Boisduval) and ichthyotoxicity against killifish. Copyright (C) 1996 Elsevier Science Ltd