Negishi cross-coupling reactions are described. This method readily provides various enones from enol triflates and diorganozinc reagents with catalytic amounts of nickel(II) chloride–4,4′-dimethoxyl-2,2′-bipyridyl under carbonmonoxide atmosphere. The rate of carbonmonoxide insertion is increased by the addition of lithium or magnesium halides and the use of polar solvents. Alkenyl iodides can also
Enones from Acid Fluorides and Vinyl Triflates by Reductive Nickel Catalysis
作者:Feng-Feng Pan、Peng Guo、Chun-Ling Li、Peifeng Su、Xing-Zhong Shu
DOI:10.1021/acs.orglett.9b01164
日期:2019.5.17
A nickel-catalyzed reductive coupling between acid fluorides and vinyl triflates has been described. This method provides an efficient access to various enones and avoids the requirement for acyl or vinyl metallic reagents in the conventional approaches. The reaction proceeds with a broad range of acid fluorides and cyclic vinyl triflates, tolerating several functional groups. The utility of this synthetic
A highly efficient, practical, and ligand-free palladium-catalyzed carbonylation of aryliodides with alkenylboronic acids has been developed. A variety of chalcones and α-branched enones were isolated in satisfactory to good yields with good substrate compatibilities under an ambient pressure of CO at room temperature. Moreover, the transformation proceeds well in the presence of a substoichiometric
开发了一种高效、实用且无配体的钯催化芳基碘与烯基硼酸的羰基化反应。在室温和 CO2 环境压力下,各种查尔酮和 α-支链烯酮的分离结果令人满意,产率良好,底物相容性好。此外,在存在亚化学计量量的碱的情况下,转化进行得很好。该策略作为后期功能化平台的优点已通过对源自雌酮和 3-苯基- 的复杂底物的修饰得到证明升-丙氨酸。
CN116162027
申请人:——
公开号:——
公开(公告)日:——
Photochemical reactions of 1-cyclopentenyl and 1-cyclohexenyl ketones