Synthetic studies towards NG-121: diastereoselective synthesis of NG-121 methyl ether
Title | Synthetic studies towards NG-121: diastereoselective synthesis of NG-121 methyl ether |
Publication Type | Journal Article |
Year of Publication | 2012 |
Authors | Singh, M, Argade, NP |
Journal | Synthesis-Stuttgart |
Volume | 44 |
Issue | 24 |
Pagination | 3797-3804 |
Date Published | DEC |
ISSN | 0039-7881 |
Keywords | 4-bromo-3, 5-dihydroxybenzoate, formylation, intramolecular cyclization, lactonization, NG-121 methyl ether, Stille coupling |
Abstract | 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. |
DOI | 10.1055/s-0032-1317544 |
Type of Journal (Indian or Foreign) | Foreign |
Impact Factor (IF) | 2.5 |
Divison category:
Organic Chemistry