Scaffold Hopping in Agrochemical Research: Discovery of Insecticidal 4-Pyridyl Isobenzofurans
作者:Ann M. Buysse、John Herbert、William T. Lambert、Frank J. Wessels
DOI:10.1021/acs.jafc.1c08273
日期:2022.9.14
The insecticidal activity of pyridinecompounds substituted at the 4-position with lipophilic groups has been reported in recent agrochemical patent applications. Encouraged by these reports, 4-pyridyl dihydroisobenzofuran(one)s were designed to test scaffold-hopping hypotheses with the goal of discovering new insecticidally active areas of chemistry. A series of 4-pyridyl dihydroisobenzofuran(one)s
A series of substituted 5-, 6-, and 7-azaindoles were prepared via the Hemetsberger-Knittel reaction. In general, better yields were obtained at higher temperatures and shorter reaction times than required for the formation of the analogous indoles, and in some cases, only decomposition occurred below a minimum temperature. The resulting templates offer up to five sites for subsequent functionalization