950-99-2Relevant articles and documents
Synthesis of 2,2-dialkyl chromanes by intramolecular Ullmann C–O coupling reactions toward the total synthesis of D-α-tocopherol
Tsubogo, Tetsu,Aoyama, Saki,Takeda, Rika,Uchiro, Hiromi
, p. 843 - 846 (2018/09/10)
The complete synthesis of D-α-tocopherol was achieved using our developed-Ullmann C–O coupling reaction as a key reaction. The synthesis of the core structure of D-α-tocopherol, which is a chiral chromane, has never been reported using intramolecular Ullmann C–O coupling reactions owing to the low reactivity of electron-rich iodoarenes with tertiary alcohols. Because the developed intramolecular C–O coupling reactions prefer electron-rich iodoarenes with tertiary alcohols, we successfully synthesized the chiral chromane core and achieved the total synthesis of D-α-tocopherol.
Alcohol, Aldehyde, and Ketone Liberation and Intracellular Cargo Release through Peroxide-Mediated α-Boryl Ether Fragmentation
Hanna, Ramsey D.,Naro, Yuta,Deiters, Alexander,Floreancig, Paul E.
supporting information, p. 13353 - 13360 (2016/10/22)
α-Boryl ethers, carbonates, and acetals, readily prepared from the corresponding alcohols that are accessed through ketone diboration, react rapidly with hydrogen peroxide to release alcohols, aldehydes, and ketones through the collapse of hemiacetal intermediates. Experiments with α-boryl acetals containing a latent fluorophore clearly demonstrate that cargo can be released inside cells in the presence of exogenous or endogenous hydrogen peroxide. These experiments show that this protocol can be used for drug activation in an oxidative environment without generating toxic byproducts.
Mesoporous and hexagonally ordered CuAl-SBA-15-catalyzed tandem C-C and C-O bond formation between phenols and allylic alcohols
Varghese, Shaji,Anand, Chokkalinkam,Dhawale, Dattatray,Mano, Ajayan,Balasubramanian, Veerappan V.,Raj, George Allen Gnana,Nagarajan, Samuthira,Wahab, Mohammad A.,Vinu, Ajayan
, p. 5656 - 5659 (2012/10/29)
A novel mesoporous catalyst, CuAl-SBA-15, with a hexagonally ordered porous structure prepared via a soft-templating approach in a highly acidic medium is used for tandem C-C and C-O bond formation between phenols and allylic alcohols to afford a variety of dihydrobenzopyrans in good yields. The catalyst is also found to be highly active for the synthesis of vitamin E and can be recycled several times without significant loss of its activity.