Ligand‐Controlled Regiodivergence in Nickel‐Catalyzed Hydroarylation and Hydroalkenylation of Alkenyl Carboxylic Acids**
作者:Zi‐Qi Li、Yue Fu、Ruohan Deng、Van T. Tran、Yang Gao、Peng Liu、Keary M. Engle
DOI:10.1002/anie.202010840
日期:2020.12.14
the ligand environment around the metal center dictates the regiochemical outcome. Markovnikov hydrofunctionalization products are obtained under mild ligand‐free conditions, with up to 99 % yield and >20:1 selectivity. Alternatively, anti‐Markovnikov products can be accessed with a novel 4,4‐disubstituted Pyrox ligand in excellent yield and >20:1 selectivity. Both electronic and stericeffects on the
systems, as well as terminal alkenes, into the corresponding carboxylicacids in excellent yields. The outstanding stability of the catalyst system (26 recycling runs in 32 days without measurable loss of activity), is showcased in the preparation of an industrially relevant fatty acid. Key-to-success is the use of a built-in-base ligand under acidic aqueous conditions. This catalytic system is expected to
METHOD FOR PREPARING ORTHO-SUBSTITUTED AMINOFERROCENES
申请人:Metallinos Costa
公开号:US20100137588A1
公开(公告)日:2010-06-03
The present disclosure relates to a method for preparing an ortho-substituted aminoferrocene comprising reacting an aminoferrocene with a Lewis acid and a lithiating reagent in the presence of an electrophile to form the ortho-substituted aminoferrocene.
An atom-economic approach to carboxylic acids via Pd-catalyzed direct addition of formic acid to olefins with acetic anhydride as a co-catalyst
作者:Yang Wang、Wenlong Ren、Yian Shi
DOI:10.1039/c5ob01180a
日期:——
An effective Pd-catalyzed hydrocarboxylation of olefins using formic acid with acetic anhydride as a co-catalyst is described.
一种利用甲酸和乙酸酐作为共催化剂,通过Pd催化的烯烃水合羧化方法被描述。
An N-Heterocyclic Carbene-Catalyzed Oxidative γ-Aminoalkylation of Saturated Carboxylic Acids through in Situ Activation Strategy: Access to δ-Lactam
作者:Yonglei Que、Yuanwei Xie、Tuanjie Li、Chenxia Yu、Shujiang Tu、Changsheng Yao
DOI:10.1021/acs.orglett.5b03223
日期:2015.12.18
An N-Heterocyclic Carbene (NHC)-catalyzed oxidative formal [4 + 2] annulation of acylhydrazones with saturatedcarboxylicacids bearing γ-H to assemble δ-lactams featuring a chiral carbon stereogenic center was developed through an in situactivationstrategy. The ready availability of the starting materials, excellent enantioselectivity, facile assembly, high yields, and potential biological significance