Iodide reagent controlled reaction pathway of iodoperoxidation of alkenes: a high regioselectivity synthesis of α- and β-iodoperoxidates under solvent-free conditions
作者:Xiaofang Gao、Hongling Yang、Chen Cheng、Qi Jia、Fang Gao、Hongxiang Chen、Qun Cai、Chuangjian Wang
DOI:10.1039/c8gc00209f
日期:——
afforded a convenient path to obtain two different configurations of iodoperoxidates from the same starting materials. Notably, the regiodivergent iodoperoxidation reaction was achieved by using different iodide reagents. A series of control experiments were performed, which suggested the involvement of a radical pathway for the anti-Markovnikov type iodoperoxidates (α) in the combination of ammonium
Lanthanum-Catalyzed Regioselective Anti-Markovnikov Hydrophosphinylation of Styrenes
作者:Yesmin Akter Rina、Joseph A. R. Schmidt
DOI:10.1021/acs.organomet.9b00549
日期:2019.11.11
A useful and convenient method for sp3 C–P(O) bond formation via direct regioselective hydrophosphinylation of simple and readily available alkenes using a lanthanum-based N,N-dimethylbenzylamine complex (La(DMBA)3) as a precatalyst is demonstrated. The reaction proceeds with perfect atom economy for a wide range of styrenes with secondary phosphine oxides, giving moderate to excellent yields.
functional group tolerant cobalt-catalyzed method for the intermolecular hydrofunctionalization of alkenes with oxygen- and nitrogen-based nucleophiles is reported. This protocol features a strategic use of hypervalent iodine(III) reagents that enables a mechanistic shift from conventional cobalt-hydride catalysis. Key evidence was found supporting a unique bimetallic-mediated rate-limiting step involving