Synthesis of Ferrocene Derivatives with Planar Chirality via Palladium-Catalyzed Enantioselective C–H Bond Activation
摘要:
The first catalytic and enantioselective C-H direct acylation of ferrocene derivative has been developed A series of 2-acyl-1-dimethylaminomethylferrocenes with planar chirality were provided under highly efficient and concise one-pot condition with up to 85% yield and 98% ee. The products obtained could be easily converted to various chiral ligands via diverse trans formations.
Copper-Catalyzed Aerobic Oxidative C–C Bond Cleavage of 1,3-Diaryldiketones To Synthesize 1,2-Diketones
作者:Ning Jiao、Chun Zhang、Xiaoyang Wang
DOI:10.1055/s-0033-1341243
日期:——
An aerobic oxidative C–C bond cleavage of 1,3-diaryldiketones for the synthesis of 1,2-diketones by using O2 as the oxidant has been developed. Control experiments illustrate that the copper catalyst not only assist the aerobic oxidative process of 1,3-diketones, but also catalyze the 1,2-Wagner–Meerwein-type rearrangement process.
Copper-Catalyzed Direct Synthesis of Diaryl 1,2-Diketones from Aryl Iodides and Propiolic Acids
作者:Hongkeun Min、Thiruvengadam Palani、Kyungho Park、Jinil Hwang、Sunwoo Lee
DOI:10.1021/jo501089k
日期:2014.7.3
via the direct decarboxylativecoupling reaction of aryl propiolicacids and their oxidation. The optimized conditions are that the reaction of aryl propiolicacids and aryl iodides is conducted at 140 °C for 6 h in the presence of 10 mol % CuI/Cu(OTf)2 and Cs2CO3, after which HI (aq) is added and further reacted. The method shows good functional group tolerance toward ester, aldehyde, cyano, and nitro
通过芳基丙酸的直接脱羧偶联反应及其氧化反应合成苯甲醚衍生物,例如二芳基1,2-二酮。优化的条件是在10 mol%CuI / Cu(OTf)2和Cs 2 CO 3的存在下,芳基丙酸和芳基碘化物的反应在140°C下进行6 h ,之后HI(aq)为加入并进一步反应。该方法显示出对酯,醛,氰基和硝基的良好官能团耐受性。另外,在钯和铜催化剂的存在下,从芳基碘化物和丙酸获得对称的二芳基1,2-二酮。
Synthesis of alkyl- and alkoxy-substituted benzils and oxidative coupling to tetraalkoxyphenanthrene-9,10-diones
作者:Bernhard Mohr、Volker Enkelmann、Gerhard Wegner
DOI:10.1021/jo00082a022
日期:1994.2
Intermolecular Friedel-Crafts acylation of various substituted alkyl- or alkoxybenzenes with oxalyl chloride using carbon disulfide as solvent gave rise to the benzils 1a-k. Subsequent intramolecular oxidative coupling with either thallium(III) oxide/trifluoroacetic acid or vanadium(V) oxyfluoride/boron trifluoride diethyl etherate resulted in the corresponding phenanthrene-9,10-diones 2a-d. It has been shown that oxygen functionalities at the 3, 3', 4, and 4' positions are necessary for coupling to occur. These substituted benzils and phenanthrene-9,10-diones constitute precursors for ligands in the field of discotic metallomesogens or polymeric mesogens.
Coffey, Recueil des Travaux Chimiques des Pays-Bas, 1923, vol. 42, p. 412
作者:Coffey
DOI:——
日期:——
Process for preparing aromatic polycarboxylic acids