Total Syntheses of Plagiochins A and D, Macrocyclic Bis(bibenzyls), by Pd(0) Catalyzed Intramolecular Stille-Kelly Reaction1
摘要:
Total syntheses of plagiochins A (1) and D (4), the former of which exhibits a significant neurotrophic activity, have been accomplished. The key 16-membered ring closure in 4 has been achieved directly from the dibromoperrottetin derivative (7) by Pd(0) catalyzed intramolecular Stille-Kelly reaction, whereas 1 has been synthesized from the dibromide (28) via the trimethylstannyl compounds (29) and (30) by Pd(0) catalyzed intramolecular Stille reaction.
Plagiochins A, B, C, and D, new type of macrocyclic bis(bibenzyls) having a biphenyl linkage between the ortho positions to the benzyl methylenes, from the liverwort subsp.
Total syntheses of plagiochins A (1) and D (4), the former of which exhibits a significant neurotrophic activity, have been accomplished. The key 16-membered ring closure in 4 has been achieved directly from the dibromoperrottetin derivative (7) by Pd(0) catalyzed intramolecular Stille-Kelly reaction, whereas 1 has been synthesized from the dibromide (28) via the trimethylstannyl compounds (29) and (30) by Pd(0) catalyzed intramolecular Stille reaction.
Kametler, Laszlo; Keserue, Gyoergy M.; Nogradi, Mihaly, Liebigs Annalen der Chemie, 1992, # 12, p. 1239 - 1244
作者:Kametler, Laszlo、Keserue, Gyoergy M.、Nogradi, Mihaly、Mezey-Vandor, Gabriella、Vermes, Borbala、Kajtar-Peredy, Maria