Asymmetric synthesis of 3(S),17-dihydroxytanshinone
摘要:
The first synthesis of 3(S),17-dihydroxytanshinone was achieved by ultrasound promoted Diels-Alder reaction of the protected 3-hydroxymethyl-4,5-benzofurandione with a vinylcyclohexene derivative. Bioassay showed that the synthetic 3(S), 17-dihydroxytanshinone was active in vitro against HL-60 tumor cell line by MTT method. (C) 2003 Elsevier Ltd. All rights reserved.
present a full account on the development of the totalsynthesis of the antiviral meroterpenoid (+)-stachyflin. The decalin subunit is rapidly accessed by an exo-selective Diels–Alder reaction, whereas the isonindolinone was synthesized via a highly efficient and practical de novo route starting from dimedone. A challenging sp2–sp3 Negishicross-couplingreaction enabled construction of the crucial C15–C16
作者:Suresh E. Kurhade、Abbas I. Sanchawala、Velayutham Ravikumar、Debnath Bhuniya、D. Srinivasa Reddy
DOI:10.1021/ol201336x
日期:2011.7.15
The first totalsynthesis of isofregenedadiol, a bicyclic diterpene isolated from H. Viscosum, is reported starting from a d-(−)-pantolactone chiral pool. A one-pot quadruple reaction sequence comprising an enynering-closingmetathesis/cross-metathesis/Diels–Alder/aromatization for the construction of a target skeleton is the highlight of the present synthesis.