Chemo- and stereocontrolled alkylation of 1,2-disubstituted at the lower rim 1,2-alternate p-tert-butylthiacalix[4]arene
作者:Ivan I. Stoikov、Alena A. Yantemirova、Roman V. Nosov、Ajdar R. Julmetov、Vladimir V. Klochkov、Igor S. Antipin、Alexander I. Konovalov
DOI:10.1016/j.mencom.2011.01.017
日期:2011.1
1,2-Alternatep-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 0,0',N,N'-tetraalkylation one in the case of K2CO3.