A. Arcadi et al., The palladium-catalyzed reaction of o-alkynyltrifluoroacetanilides with alkyl halides. An entry into 2-substituted 3-alkylindoles, SYNLETT, (3), 2000, pp. 394-396
Indolylcarboxylate esters 2 and 2-substituted-3-benzylindoles 4 are prepare
d usually in good yield through the palladium-catalyzed reaction of o-alkyn
yltrifluoro acetanilides with ethyl iodoacetate or benzyl bromide. Best res
ults are obtained by employing Pd-2(dba)(3) and tris(2,4,6-trimethoxyphenyl
)phosphine in THF.