82358-34-7

Upstream product

• 82358-31-4 coelogin 
• 1510682-99-1 C₃₂H₂₈O₇ 
• 1510682-94-6 C₃₂H₂₈O₇ 
• 1510682-92-4 C₃₉H₃₄O₇ 
• 1510682-89-9 C₃₈H₃₄O₈ 
• 1510682-86-6 C₁₇H₁₇IO₅ 
• 1510682-84-4 2-(3,5-bis(benzyloxy)-2-bromophenyl)-1,3-dioxolane 
• 85565-94-2 2-bromo-3,5-bis(benzyloxy)benzaldehyde 
• 67093-26-9 2-bromo-1-(hydroxymethyl)-3,5-bis-(benzyloxy)-benzene 
• 24131-31-5 3,5-dibenzyloxybenzyl alcohol 
• 58605-10-0 methyl 3,5-bis(benzyloxy)benzoate 
• 2150-44-9 1-carbomethoxy-3,5-dihydroxybenzene 
• 1360789-67-8 methyl 2-hydroxy-6-iodo-3,4-dimethoxybenzoate 
• 1752-02-9 methyl 6-iodo-2,3,4-trimethoxybenzoate 

Relevant academic research and scientific papers

Polycationic ligands in gold catalysis: Synthesis and applications of extremely π-acidic catalysts

Very often ligands are anionic or neutral species. Cationic ones are rare, and, when used, the positively charged groups are normally appended to the periphery of the ligand. Here, we describe a dicationic phosphine with no spacer between the phosphorus atom and the two positively charged groups. This structural feature makes its donor ability poorer than that of phosphites and only comparable to extremely toxic or pyrophoric compounds such as PF 3 or P(CF3)3. By exploiting these properties, a new Au catalyst has been developed displaying a dramatically enhanced capacity to activate π-systems. This has been used to synthesize very sterically hindered and naturally occurring 4,5-disubstituted phenanthrenes. The present approach is expected to be applicable to the development and improvement of many other transition metal catalyzed transformations that benefit from extremely strong π-acceptor ligands. The mechanism of selected catalytic transformations has been explored by density functional calculations.

Phenanthrene Synthesis: Coeloginin a Novel 9,10-Dihydrophenanthrene from the Orchid Coelogyne cristata

The synthesis of 2,6-dihydroxy-7,8-dimethoxy-9,10-dihydro-5H-phenanthropyran-5-one (coeloginin) (1), a natural product isolated from the orchid Coelogyne cristata, is described.The key step involved the treatment of methyl 9,10-dihydro-5,7-di-iso

Coelogin and Coeloginin: Two Novel 9,10-Dihydrophenanthrene Derivatives from the Orchid Coelogyne cristata

Coelogin and coeloginin, two novel 9,10-dihydrophenanthrene derivatives of the high altitude Himalayan orchid Coelogyne cristata, have been shown to have the phenanthropyran structures (1a) and (1b), respectively, from spectral and chemical evidence.