Em. Beccalli et A. Marchesini, NEW INDOLE-DERIVATIVES - SYNTHESIS OF CYL-1-CARBETHOXY-2-TRIFLUOROMETHANESULFONYLINDOLES AND OF SUBSTITUTED 2-VINYLINDOLES, Tetrahedron, 51(8), 1995, pp. 2353-2362
cyl-1-carbethoxy-2-trifluoromethanesulfonylindoles 6 and 3-acyl-2-viny
lindoles 7 are synthesized from 3-[(1-chloro)alkylidene]indol-2(3H)-on
es 2 via xy-3-[(1-dimethylamino)alkylidene]indol-2(3H)-ones 4.