Efficient One-to-One Coupling of Easily Available 1,3-Dienes with Carbon Dioxide
作者:Jun Takaya、Kota Sasano、Nobuharu Iwasawa
DOI:10.1021/ol2002094
日期:2011.4.1
reaction of atmospheric pressure carbon dioxide with 1,3-dienes is realized for the first time through PSiP-pincer type palladium-catalyzed hydrocarboxylation. The reaction is applicable to various 1,3-dienes including easily available chemical feedstock such as 1,3-butadiene and isoprene. This protocol affords a highly useful method for the synthesis of β,γ-unsaturated carboxylic acid derivatives from
Herein we report a versatile Mizoroki–Heck‐type photoinduced C(sp3)−N bondcleavage reaction. Under visible‐light irradiation (455 nm, blue LEDs) at room temperature, alkyl Katritzky salts react smoothly with alkenes in a 1:1 molar ratio in the presence of 1.0 mol % of commercially available photoredox catalyst without the need for any base, affording the corresponding alkyl‐substituted alkenes in
Ruthenium-Catalyzed Heck-Type Alkenylation of Alkyl Bromides
作者:José María Muñoz-Molina、Pedro J. Pérez
DOI:10.1021/acs.joc.9b00898
日期:2019.6.21
Heck-type alkenylation of alkylbromides in the first example using this metal under thermal conditions. The coupling reaction proceeds efficiently with a variety of functionalized tertiary, secondary, and primary alkylbromides. The presence of Hünig’s base has been revealed to be crucial for this transformation. Preliminary mechanistic studies support the participation of alkyl radicals in the reaction