First total synthesis of natural aplyolides C and E, ichthyotoxic macrolides isolated from the skin of the marine mollusc Aplysia depilans
摘要:
A convergent pathway is described for the synthesis of the marine macrolides aplyolides C 4 and E 5. The key fragment 8 was prepared stereo selectively by Sharpless asymmetric dihydroxylation of eneyne 13. (C) 2002 Elsevier Science Ltd. All rights reserved.
First total synthesis of natural aplyolides C and E, ichthyotoxic macrolides isolated from the skin of the marine mollusc Aplysia depilans
摘要:
A convergent pathway is described for the synthesis of the marine macrolides aplyolides C 4 and E 5. The key fragment 8 was prepared stereo selectively by Sharpless asymmetric dihydroxylation of eneyne 13. (C) 2002 Elsevier Science Ltd. All rights reserved.
The C16–C22 fragment with the acetylene terminus was constructed through the asymmetric dihydroxylation of the corresponding olefin, while the 15-iodo-olefin corresponding to the C11–C15 part was prepared via the asymmetric transfer hydrogenation of the corresponding acetylene ketone followed by hydrozirconation/iodination. Both pieces were joined by a Sonogashira coupling, and the product was further
Regioselective Alkynylation of Allylic Phosphates with Alkynyl Copper Reagents
作者:Shunki Mamada、Narihito Ogawa
DOI:10.1002/ejoc.202300056
日期:——
We developed a regioselective alkynylation of allylic phosphates with alkynyl copper reagents. The reaction gave 1,4-enynes independent of steric hindrance or electronic effects of the substrate or nucleophile. Then, we efficiently synthesized intermediates in the synthesis of lipid metabolites using this reaction.