1422953-20-5Relevant articles and documents
Synthetic studies towards NG-121: Diastereoselective synthesis of NG-121 methyl ether
Singh, Mandeep,Argade, Narshinha P.
, p. 3797 - 3804 (2013/02/22)
Starting from unsymmetrically O-protected methyl 4-bromo-3,5- dihydroxybenzoate, a facile synthesis of the methyl ether of bioactive natural product NG-121 was accomplished in very good overall yield. The key steps were: Stille coupling reaction of the farnesyl unit with the electron-rich phenolic segment; hydroxy-directed selective epoxidation of the farnesyl chain along with concomitant phenol-driven intramolecular regio- and diastereoselective ring closure to the corresponding hydroxybenzopyran; and regioselective formylation followed by in situ reductive lactonization. Georg Thieme Verlag KG · Stuttgart · New York.