M. Somei et al., THE CHEMISTRY OF INDOLES .67. SYNTHESES OF (PLUS-OR-MINUS)-CLAVICIPITIC ACID AND ITS DERIVATIVES, Heterocycles, 37(2), 1994, pp. 719-724
A formal total synthesis of (+/-)-clavicipitic acid was achieved in fi
ve steps from indole-3-carboxaldehyde. Syntheses of (+/-)-4-cyano-, (/-)-4-methyl-, and yl)-3,4,5,6-tetrahydro-1H-azepino[5,4,3-cd]indoles
are also reported.