Total Synthesis of Alanense A through an Intramolecular Friedel–Crafts Alkylation
作者:Kosho Makino、Rio Fukuda、Shunsuke Sueki、Masahiro Anada
DOI:10.1021/acs.joc.3c02481
日期:2024.2.2
The first total synthesis of cadinane sesquiterpenoid alanense A, in which an intramolecular dehydrative Friedel–Crafts alkylation of 2,5-diaryl-2-pentanol is incorporated as a key step, has been achieved. The combinatorial use of p-TsOH·H2O as a catalyst and 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP) as a solvent provides 1,1-disubstituted tetrahydronaphthalene in 97% yield. It was also found that the
首次实现了杜松倍半萜 alanense A 的全合成,其中关键步骤是 2,5-二芳基-2-戊醇的分子内脱水 Friedel-Crafts 烷基化。组合使用p -TsOH·H 2 O作为催化剂和1,1,1,3,3,3-六氟-2-丙醇(HFIP)作为溶剂,以97%的收率提供1,1-二取代的四氢萘。研究还发现, p -TsOH 和 HFIP 的组合可有效去除酚类 MOM 醚。