CgPhen-DalPhos Enables the Nickel-Catalyzed <i>O</i>-Arylation of Tertiary Alcohols with (Hetero)Aryl Electrophiles
作者:Kathleen M. Morrison、Ryan T. McGuire、Michael J. Ferguson、Mark Stradiotto
DOI:10.1021/acscatal.1c03010
日期:2021.9.3
Ni-catalyzed cross-coupling of primary or secondary aliphatic alcohols and (hetero)arylelectrophiles is known, related cross-couplings involving tertiary aliphatic alcohols, with a broad scope, are challenging. Herein we disclose that a NiII precatalyst featuring the ligand CgPhen-DalPhos is unusual in its ability to promote the C–O cross-coupling of tertiary aliphatic alcohols with (hetero)arylhalides (Cl
虽然已知脂肪族伯醇或仲醇与(杂)芳基亲电子试剂的 Ni 催化交叉偶联,但涉及脂肪叔醇的相关交叉偶联范围广泛,具有挑战性。在本文中,我们公开了一种以配体 CgPhen-DalPhos 为特征的Ni II预催化剂,它能够促进叔脂肪醇与(杂)芳基卤化物(Cl、Br 和 I)或苯酚衍生物的 C-O 交叉偶联。 OM 和 OPiv)。对底物范围和竞争实验的探索有助于阐明该催化剂体系的能力和反应偏好。
An Efficient Method for the Preparation of Tertiary Esters by Palladium-Catalyzed Alkoxycarbonylation of Aryl Bromides
作者:Zhuo Xin、Thomas M. Gøgsig、Anders T. Lindhardt、Troels Skrydstrup
DOI:10.1021/ol203057w
日期:2012.1.6
The palladium-catalyzed alkoxycarbonylation of aryl bromides is described for the efficient preparation of tertiary esters. The protocol proved compatible with a wide variety of functionallzed (hetero)aromatic bromides, as well as several different sterically hindered tertiary alcohols, affording the alkoxycarbonylated products in high yields. Finally, the formation of aromatic trityl esters is discussed.
Preparation and properties of 1-adamantoxides, 2-adamantoxides, and 1-adamantylmethoxides of Ti IV , V IV , Nb IV , Nb V , Cr III , Cr IV , Mo IV , Mn II , Fe III , and Co II . The crystal and molecular structure of tetrakis(1-adamantoxo)dimethylaminemolybdenum(IV)
作者:Manfred Bochmann、Geoffrey Wilkinson、G. Brent Young、Michael B. Hursthouse、K. M. Abdul Malik