Intramolecular SNAr reactions in a large-ring ketocalix[6]arene.
Ketocalix[6]arene 2e was prepared by CrO3 oxidation of the methylene groups of 2a, followed by hydrolysis of the acetate groups. 2e undergoes intramolecular SNAr reactions under the usual methylation conditions (MeI, base), yielding mono- and dixanthone calixarene derivatives.
Kogan
Katerina
K
Department of Organic Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.
Biali
Silvio E
SE