Chemo- and stereocontrolled alkylation of 1,2-disubstituted at the lower rim 1,2-alternate p-tert-butylthiacalix[4]arene

Abstract

1,2-Alternate p-tert-butylthiacalix[4]arene bearing at the lower rim 1,2-positioned acetamide fragments reacts with ethyl bromoacetate to give mono-O-alkylation product when Na2CO3 is used as a base and O,O′,N,N′-tetraalkylation one in the case of K 2CO3. © 2011 Mendeleev Communications. All rights reserved.