straightforward and efficient synthesis of naphtho[1,8‐bc]pyran derivatives and related polycyclic compounds is achieved by the rhodium‐catalyzed oxidative coupling of 1‐naphthols or other phenolic and alcoholic substrates with alkynes. In these annulation reactions, the hydroxy groups effectively act as the key function for the regioselective CHbondcleavage.
萘并[1,8- bc ]吡喃衍生物和相关多环化合物的直接有效合成是通过1-萘酚或其他酚和醇底物与炔烃的铑催化氧化偶联而实现的。在这些环化反应中,羟基有效地充当区域选择性CH键裂解的关键功能。
Electrochemical ruthenium-catalyzed alkyne annulations by C–H/Het–H activation of aryl carbamates or phenols in protic media
作者:Ruhuai Mei、Julian Koeller、Lutz Ackermann
DOI:10.1039/c8cc07732k
日期:——
Electrooxidative peri-C–H activation was accomplished by versatile ruthenium(II) catalysis in terms of C–H/N–H and C–H/O–H functionalization. Thus, alkyne annulations proved viable with ample scope by organometallic C–Hactivation. The sustainable electrocatalysis exploited electricity, thereby avoiding the use of toxic transition metals as sacrificial oxidants. The robust ruthenium(II)-electrocatalysis
Electrooxidative围-C-H活化是由通用的钌(完成II)催化的C-H / N-H和C-H / O-H官能的条款。因此,通过有机金属的C–H活化,炔烃环行证明在足够的范围内是可行的。可持续的电催化利用电力,从而避免使用有毒的过渡金属作为牺牲氧化剂。鲁棒的钌(II)电催化作用在质子醇/ H 2 O反应介质中,具有极好的位置,区域和化学选择性。