Total synthesis and morphogenesis-inducing activity of (±)-thallusin and its analogues
摘要:
Total synthesis of (+/-)-thallusin was achieved using Hg(OTf)(2)-PhNMe2-induced olefin cyclization, and Suzuki coupling with a pyridyllboronic acid derivative. Hg(OTf)(2) also acted as a catalyst to isomerize the double bond into the more thermodynamically stable isomer when treated in toluene. Synthetic (+/-)-thallusin as well as an analogue showed morphogenesis-inducing activity. (c) 2007 Elsevier Ltd. All rights reserved.
(−)-Thallusin, isolated from a marine bacterium, is the only known naturalproduct to act as an algal morphogenesis inducer. Because (−)-thallusin can only be obtained in exceedingly limited amounts from microbial cultivation, a synthetic supply of this compound is highly desirable. Here, we describe a novel synthetic pathway to (±)-thallusin and the first asymmetric synthesis of (−)-thallusin utilizing
Total synthesis of (+/-)-thallusin was achieved using Hg(OTf)(2)-PhNMe2-induced olefin cyclization, and Suzuki coupling with a pyridyllboronic acid derivative. Hg(OTf)(2) also acted as a catalyst to isomerize the double bond into the more thermodynamically stable isomer when treated in toluene. Synthetic (+/-)-thallusin as well as an analogue showed morphogenesis-inducing activity. (c) 2007 Elsevier Ltd. All rights reserved.