Synthesis of crown ethers containing a thiazole subcyclic unit
作者:Hong-Seok Kim、Ii-Chun Kwon、Jun-Hyeak Choi
DOI:10.1002/jhet.5570360528
日期:1999.9
Crown etherscontaining a thiazole subcyclic unit are prepared from the reactions of 1,3-bis[2(4-hydroxymethylthiazoyl)]benzene with di-p-tosylates of corresponding di, tri, tetra, pentaethylene glycols in the presence of potassium hydride. However, if the cavity size in the ring system is small, [2+2] cyclization adduct also is formed.