iodides through a palladium-catalyzed carbonylation followed by an inter- or intramolecular coupling reaction with alcohols to afford the corresponding esters or lactones, respectively. Styrene derivatives were also efficient substrates in an in-situ Mizoroki-Heck-type cross-coupling reaction with aryl iodides, leading to the effective formation of asymmetric stilbenes. The decarbonylation of cinnamaldehyde
Alkoxycarbonylation of aryl iodides using gaseous carbon monoxide and pre-pressurized reaction vessels in conjunction with microwave heating
作者:Chad M. Kormos、Nicholas E. Leadbeater
DOI:10.1039/b614025d
日期:——
The microwave-promoted alkoxycarbonylation of aryl iodides using reaction vessels pre-pressurized with carbon monoxide is reported. Reactions are performed using 0.1 mol% palladium acetate as catalyst, DBU as base and are complete within 20–30 min. A range of aryl iodide substrates can be converted to the corresponding esters using this methodology. Primary and secondary alcohols work well whereas a tertiary alcohol substrate proves less reactive. The potential for scale-up of the reaction has also been explored.
Herein, we report an efficient method for the tertiary alkylation of a ketone by using an α‐bromocarbonyl compound as the tertiary alkyl source in a combined Cu‐organocatalyst system. This dual catalyst system enables the addition of a tertiary alkyl radical to an enamine. Mechanistic studies revealed that the catalytically generated enamine is a key intermediate in the catalytic cycle. The developed
AGENTS INHIBANT LA PROTEINE TCTP POUR LE TRAITEMENT DE MALADIES PROLIFERATIVES, DE MALADIES INFECTIEUSES, D'ALLERGIES, D'INFLAMMATIONS ET/OU DE L'ASTHME
申请人:Universite Paris-Sud
公开号:EP3687512A1
公开(公告)日:2020-08-05
Eco-friendly iron-catalyzed oxidation of unstrained tertiary aromatic alcohols to ketones
作者:Shanmei Zhu、Penghui Hu、Mengying Guo、Linlin Zhao、Linlin Yang、Wei-Jin Gu、Wei Han
DOI:10.1016/j.cclet.2023.108835
日期:2024.1
A general, facile and eco-friendly iron catalysis enables oxidation of unstrained tertiary aromaticalcohols to ketones through C−C bond cleavage even with H2O2 as the oxidant. Notably, this transformation can tolerate oxidation-labile functional groups. The robustness of this method is further demonstrated on the late-stage oxidation of complex bioactive molecules.
一种通用、简便且环保的铁催化方法,即使使用 H 2 O 2作为氧化剂,也能通过 C−C 键断裂将无张力的叔芳香醇氧化为酮。值得注意的是,这种转化可以耐受氧化不稳定的官能团。该方法的稳健性在复杂生物活性分子的后期氧化中得到进一步证明。