A facile access to indene frameworks through condensation of substituted cinnamylaldehydes and sulfonylamines under the catalysis of FeCl3 is reported.
通过FeCl3催化下,报告了通过取代的肉桂醛和磺酰胺的缩合轻松获得茚骨架。
Intramolecular electrophilic aromatic substitution of α-alkylcinnamaldehydes affording 1-alkoxy-2-alkylindenes
Treatment of α-alkylcinnamaldehydes with orthoesters, alcohols, or thiols in the presence of BF3·OEt2 induces an intramolecularelectrophilicaromaticsubstitution reaction to afford 1-alkoxy-2-alkylindenes. The reaction mechanisms of the indene formation have been elucidated on the basis of the reaction behaviors of β-deuterated α-methylcinnamaldehyde and the NMR studies of the reaction mixture. The
Asymmetric Total Synthesis of (−)-Erogorgiaene and Its C-11 Epimer and Investigation of Their Antimycobacterial Activity
作者:Celia A. Incerti-Pradillos、Mikhail A. Kabeshov、Paul S. O'Hora、Sergei A. Shipilovskikh、Aleksandr E. Rubtsov、Vera A. Drobkova、Svetlana Yu. Balandina、Andrei V. Malkov
DOI:10.1002/chem.201602440
日期:2016.9.26
A short, nine‐step, highly enantioselective synthesis of (−)‐erogorgiaene and its C‐11 epimer is reported. The key stereochemistry controlling steps involve catalytic asymmetric crotylation, anionic oxy‐Cope rearrangement and cationic cyclisation. (−)‐Erogorgiaene exhibited promising antitubercular activity against multidrug‐resistant strains of Mycobacterium tuberculosis.
A compound having the structure (A) where R1 is C1 to C5 alkyl, and R2 to R5 are independently selected from H and methyl, having a strong odour and for use as a perfumery ingredient, particularly in Muguet accords/fragrances, is provided.
A compound having the structure (A) where R1 is C1 to C5 alkyl, and R2 to R5 are independently selected from H and methyl, having a strong odor and for use as a perfumery ingredient, particularly in Muguet accords/fragrances, is provided.