Macrosphelides C and F were synthesized by lactonization of 14-oxo seco acids at the O(10)-C(11) bond followed by reduction and Mitsunobu inversion of the resulting hydroxyl group. The seco acids were prepared from the corresponding furans by furan ring-opening with NBS followed by further oxidation of the 4-oxo-2-alkenals with NaClO2. (C) 2001 Elsevier Science Ltd. All rights reserved.
Macrosphelides C and F were synthesized by lactonization of 14-oxo seco acids at the O(10)-C(11) bond followed by reduction and Mitsunobu inversion of the resulting hydroxyl group. The seco acids were prepared from the corresponding furans by furan ring-opening with NBS followed by further oxidation of the 4-oxo-2-alkenals with NaClO2. (C) 2001 Elsevier Science Ltd. All rights reserved.
Macrosphelides C and F were synthesized by lactonization of 14-oxo seco acids at the O(10)-C(11) bond followed by reduction and Mitsunobu inversion of the resulting hydroxyl group. The seco acids were prepared from the corresponding furans by furan ring-opening with NBS followed by further oxidation of the 4-oxo-2-alkenals with NaClO2. (C) 2001 Elsevier Science Ltd. All rights reserved.