Three-component coupling using arynes and DMF: straightforward access to coumarinsvia ortho-quinone methides

H Yoshida, Y Ito, J Ohshita

Index: Yoshida, Hiroto; Ito, Yu; Ohshita, Joji Chemical Communications, 2011 , vol. 47, # 30 p. 8512 - 8514

Full Text: HTML

Citation Number: 53

Abstract

Scheme 1 A reaction pathway for the formation of 3a. ... Besides active methylene compounds, arylacetic acid esters and arylacetonitriles proved to serve efficaciously as third components in the reaction. As described in Table 2, ethyl 2-pyridylacetate (2j) and ethyl 4-pyridylacetate (2k) smoothly participate in the reaction to afford 3j and 3k in 95% and 70% yield (entries 1 and 2), whereas the reaction of ethyl 3-pyridylacetate (2l) resulted in a lower yield (entry 3), ...