“…A nickel-mediated cross-coupling 175-179 of the 6-bromocarbazole ( R )- 426 with prenyl bromide and β-cyclolavandulyl bromide 425b , − followed by ester cleavage and oxidation with either cobalt(III) fluoride or ceric ammonium nitrate (CAN), afforded carquinostatin A [( R )- 418 ] and lavanduquinocin [( R )- 419 ], respectively (Scheme , part b).…”