Studies in marine macrolide synthesis: Construction of a 24-membered macrocyclic intermediate for aplyronine A
摘要:
The C-1-C-27 macrolide 2, which contains 11 stereocentres and 4 double bonds, was constructed by an efficient 3-component coupling followed by a macrolactonisation/isomerization sequence. Key steps were the alkylation of the dianion of phosphonate 5 with iodide 7 and a Ba(OH)(2)-mediated HWE reaction with 6 to install the trisubstituted double bond. (C) 1998 Elsevier Science Ltd. All rights reserved.
Studies in marine macrolide synthesis: Construction of a 24-membered macrocyclic intermediate for aplyronine A
摘要:
The C-1-C-27 macrolide 2, which contains 11 stereocentres and 4 double bonds, was constructed by an efficient 3-component coupling followed by a macrolactonisation/isomerization sequence. Key steps were the alkylation of the dianion of phosphonate 5 with iodide 7 and a Ba(OH)(2)-mediated HWE reaction with 6 to install the trisubstituted double bond. (C) 1998 Elsevier Science Ltd. All rights reserved.