Novel synthesis of indazoles from (η6-arene)tricarbonylchromium complexes
作者:M.Rute G da Costa、M.João M Curto、Stephen G Davies、M.Teresa Duarte、C Resende、Fátima C Teixeira
DOI:10.1016/s0022-328x(00)00215-1
日期:2000.6
at N(2) and C(3), to afford [η6-1-bis(trimethylsilyl)methylindazole]tricarbonylchromium (14) and [η6-2-bis(trimethylsilyl)methyl-3-trimethylsilylindazole]tricarbonylchromium (15), respectively. The deprotonation of complex 14 followed by electrophilic quench occurs at the C(4) and C(7) positions in a ratio of 3:1 and with complex 15 the deprotonation was completely regioselective at the C(7) position