H. Jing et al., FIRST TOTAL SYNTHESIS OF ASTECHROME - NOVEL HYDROXAMIC ACID WITH AN INDOLE-PYRAZINE SKELETON, Chemical and Pharmaceutical Bulletin, 42(2), 1994, pp. 277-279
Astechrome (1), isolated from Aspergillus terreus IFO 6123 and 8835, w
as synthesized. Indolylmagnesium bromide (4) was coupled with a chloro
methylpyrazine (5) to give 6-[7-(3-methyl-2-butenyl)indol-3-yl]methylp
yrazine 1-oxide (6), which was converted to the Fe salt (9) of a hydro
xamic acid derivative (8). Oxidation of 9 with Co(salen) afforded 1.