1,2-O-Isopropylidene-5-alkene templates for the synthesis of oligo-tetrahydrofurans
作者:Darrin Dabideen、Zheming Ruan、David R Mootoo
DOI:10.1016/s0040-4020(02)00075-3
日期:2002.3
The highly functionalized THF 4 was prepared in eight steps from 2,5-cyclooctadiene. The key step in this synthesis was a novel desymmetrization reaction involving the iodoetherification of the C2 symmetric bis-isopropylidene alkene 6 to THF 4. The versatility of 4 was demonstrated by its conversion to bis-THF 3, a known precursor for trilobacin, and to the tris-THF-lactone 5, a potential relay compound for cyclic polyether analogues. (C) 2002 Elsevier Science Ltd. All rights reserved.