Chiral synthesis of polyketide-derived natural products. XXXIV. Facile total synthesis of carbonolides by Witting-Horner macro-cyclization and stereoselective expoxidation.
Chiral synthesis of polyketide-derived natural products. XXXIV. Facile total synthesis of carbonolides by Witting-Horner macro-cyclization and stereoselective expoxidation.
Chiral synthesis of polyketide-derived natural products. XXXIV. Facile total synthesis of carbonolides by Witting-Horner macro-cyclization and stereoselective expoxidation.
作者:Noriyuki NAKAJIMA、Kouichi UOTO、Osamu YONEMITSU、Tadashi HATA
DOI:10.1248/cpb.39.64
日期:——
Sixteen-membered dienone type macrolide aglycons, carbonolide B (1), niddanolide (5), and platenolide W1 (6), were synthesized highly stereoselectively from D-glucose via Yamaguchi's esterification of two fragments, 8 (C1-C10) and 9 (C11-C16), followed by Witting-Horner cyclization. Stereoselective epoxidation of the 16-membered dienones (34, 35) gave epoxy-enone-type macrolide aglycons, carbonolide A (2) and EOP aglycon (7).