Multicomponent synthesis of tertiary alkylamines by photocatalytic olefin-hydroaminoalkylation
作者:Aaron Trowbridge、Dominik Reich、Matthew J. Gaunt
DOI:10.1038/s41586-018-0537-9
日期:2018.9
accessible feedstocks into sp3-rich architectures provide a strategic advantage in the synthesis of complex alkylamines. Here we report a multicomponent, reductive photocatalytic technology that combines readily available dialkylamines, carbonyls and alkenes to build architecturally complex and functionally diverse tertiary alkylamines in a single step. This olefin-hydroaminoalkylation process involves a
A metal-, oxidant-, and fluorous solvent-free synthesis of α-indolylketones enabled by an umpolung strategy
作者:Takumi Abe、Seiya Hirao、Toshiki Yamashiro
DOI:10.1039/d0cc04795c
日期:——
Enamines undergo α-indolization with ammonium salts in the presence of Et3N to form α-indolylketones. This is the first example of transition metal-, oxidant-, and fluorous solvent-free α-indolization of ketones. Key to the success of this convenient protocol was the use of in situ generated electrophilic indole species, as well as the use of enamines as a ketone enolate equivalent.
Cyclopropene als C<sub>3</sub>-Synthesebausteine: Cyclopentenole und große Ringe aus 2-Aminobicyclo[2.1.0]pentan-Derivaten über Ringerweiterungsreaktionen
Cyclopropenes as C3 Building Blocks: Cyclopentenols and Large Rings from 2-Aminobicyclo[2.1.0]pentane Derivatives via Ring-Enlargement Reactions The readily available methyl 3,3-dimethylcyclopropane-1-carboxylate undergoes [2+2] cycloaddition with enamines to give 2-aminobicyclo[2.1.0]pentane derivatives in moderate to good yields. These compounds are quantitatively transformed into 3-cyclopentenols by treatment with dilute mineral acids. From enamines derived from medium-ring ketones and morpholine, tricyclic adducts are formed, which eliminate morpholine under flash-thermolysis conditions at 600°C to give macrocycles containing an E double bond and an allenic system.
A compound of the general formula ##STR1## wherein n is an integer of 10 to 21, inclusive; R is H or lower alkyl having 1 to 4 carbon atoms has pharmaceutical activities such as hypotensive, tissue metabolism stimulating, immuno-regulatory, lysosomal membrane stabilizing and SRS-A production inhibitory activities and is useful as a heart failure remedy, cerebral circulation disturbance remedy, immuno-regulator, and antiallergic drug.
This invention is concerned with the preparation of long-chain carboxylic acids and alcohols from cyclododecanone and acyl chlorides. More specifically, this invention relates to a process for the preparation of 1-triacontanol, CH.sub.3 (CH.sub.2).sub.28 CH.sub.2 OH. Triacontanol acts as a growth stimulant on a wide range of plants to increase dry weight gains, water uptake, water use efficiency and protein synthesis in treated plants.