Here we describe the realization of a one-pot protocol for the β-C–H halogenation of cyclic enones via umpolung of the β-carbon. The developed method includes hydrazone formation and selective β-halogenation (bromination, chlorination) with N-bromosuccinimide and Palau’chlor (2-chloro-1,3-bis(methoxycarbonyl)guanidine) followed by hydrolysis of the hydrazone moiety. Using the optimized conditions,
A Mild and Efficient Method for Semmler-Wolff Aromatization; A Versatile Route to<i>m</i>-Alkoxy-,<i>m</i>-Halogeno-, and<i>m</i>-Thiocyanato-acetanilides
作者:Yasumitsu Tamura、Yoshihiko Yoshimoto、Kiyoshi Sakai、Jun-ichi Haruta、Yasuyuki Kita
DOI:10.1055/s-1980-29253
日期:——
Gompper, Rudolf; Kottmair, Eduard, Zeitschrift fur Naturforschung, B: Chemical Sciences, 1990, vol. 45, # 6, p. 833 - 847
作者:Gompper, Rudolf、Kottmair, Eduard
DOI:——
日期:——
Boyd; Clifford; Probert, Journal of the Chemical Society, 1920, vol. 117, p. 1388