General Route for Preparing β-Nitrocarbonyl Compounds Using Copper Thermal Redox Catalysis
作者:Amber A. S. Gietter、Peter G. Gildner、Andrew P. Cinderella、Donald A. Watson
DOI:10.1021/ol5014153
日期:2014.6.6
Using a simple copper catalyst, the alkylation of nitroalkanes with α-bromocarbonyls is now possible. This method provides a general, functional group tolerant route to β-nitrocarbonyl compounds, including nitro amides, esters, ketones, and aldehydes. The highly sterically dense, functional group rich products from these reactions can be readily elaborated into a range of complex nitrogen-containing
Studies on the Synthesis of Kijanolide: Synthesis of an Advanced Seco-acid Intermediate
作者:William R. Roush、Hou Chen、Melissa L. Reilly
DOI:10.3987/com-02-s(m)17
日期:——
A synthesis of an advanced seco acid intermediate (7) in a projected total synthesis of kijanolide is described. Key steps in the synthesis of 7 include the highly diastereoselective allylation reaction of 15, the Suzuki cross coupling of dienyl iodide (11) and vinylboronic acid (12), and the IMDA reaction of 9. Elaboration of the spirotetronic acid unit of 7 was accomplished by a Dieckmann cyclization
An esterification/Friedel–Crafts-cyclization approach permitted the first successful synthetic entry into the oxacyclododecindione subclass of the dihydroxyphenylacetic acid lactone-type natural products. This route allowed the preparation of two highly active anti-inflammatory fungal secondary metabolites 14-deoxyoxacyclododecindione and 14-deoxy-4-dechlorooxacyclododecindione as well as their 14-desmethyl
Reformatsky-type addition of esters of α-halogeno carboxylic acids to aldehydes and ketones in the presence of Fe(CO)5
作者:A. B. Terent'ev、T. T. Vasil'eva、N. A. Kuz'mina、E. I. Mysov、N. S. Ikonnikov、N. Yu. Kuznetsov、Yu. N. Belokon
DOI:10.1007/bf02496013
日期:1999.6
Reformatsky-type addition of esters of α-halogeno carboxylic acids to aldehydes and ketones in the presence of Fe(CO)5 and an activating agent (CBrCl3 or I2) afforded the corresponding esters of β-hydroxy acids in good yields. Possible reaction mechanisms are discussed.
The isolation, structureelucidation, and synthesis of antalid (1), a novel secondary metabolite from Polyangium sp., is described herein. The structureelucidation of 1 was performed with the aid of mass spectrometry, high field NMR experiments, and crystal structure analysis. The absolute configuration of antalid was confirmed through the Mosher ester method and ultimately by total synthesis. In