New One-Pot Synthesis of Polysubstituted Benzofurans and Benzo-1,4-dioxines
摘要:
It has been revealed that the copper(II) triflate catalyzed reaction of ethyl-2-diazo-3-oxobutanoate with phenols followed by cyclization of the intermediate enol in the presence of polyphosphoric acid is a simple and efficient method of synthesis of polysubstituted benzofurans. The use of pyrocatechol leads to the corresponding substituted 1,4-benzodioxine-2-carboxylates as major products.
New One-Pot Synthesis of Polysubstituted Benzofurans and Benzo-1,4-dioxines
作者:G. N. Sakhabutdinova、G. Z. Raskil’dina、S. S. Zlotskii、R. M. Sultanova
DOI:10.1134/s0012500818100051
日期:2018.10
It has been revealed that the copper(II) triflate catalyzed reaction of ethyl-2-diazo-3-oxobutanoate with phenols followed by cyclization of the intermediate enol in the presence of polyphosphoric acid is a simple and efficient method of synthesis of polysubstituted benzofurans. The use of pyrocatechol leads to the corresponding substituted 1,4-benzodioxine-2-carboxylates as major products.
Synthesis and conversions of 2-carbethoxy-3-bromomethyl-7-chlorobenzofuran