368875-06-3Relevant articles and documents
Lithium-liquid ammonia mediated carbocyclisation of δ,ε- unsaturated esters: Annulation of cyclopentanones
Srikrishna,Ramasastry
, p. 379 - 382 (2007/10/03)
Lithium-liquid ammonia mediated carbanion cyclisation of δ,ε-unsaturated esters leading to cyclopentanes, fused as well as spiro, via annulation is described.
On the bioactive conformation of the rhodopsin chromophore: Absolute sense of twist around the 6-s-cis bond
Fujimoto, Yukari,Ishihara, Jun,Maki, Shojiro,Fujioka, Naoko,Wang, Tao,Furuta, Takumi,Fishkin, Nathan,Borhan, Babak,Berova, Nina,Nakanishi, Koji
, p. 4198 - 4204 (2007/10/03)
Incubation of opsin with synthetic 6-s-locked retinoids 2a and 2b only led to pigment formation from the alpha-locked 2a, the CD spectrum of which was similar to that of native rhodopsin (Rh). This establishes that the 6-s-bond of the chromophore in rhodo
Facile cleavage of vicinal tertiary diols by pyridinium dichromate
Maki, Shojiro,Ishihara, Jun,Nakanishi, Koji
, p. 651 - 655 (2007/10/03)
Vicinal tertiary diols with diaxial hydroxyl groups are cleaved selectively by PDC (pyridinium dichromate) under mild conditions to give the corresponding diketones in high yields.
Electroorganic Chemistry. 140. Electroreductively Intra- and Intermolecular Couplings of Ketones with Nitriles
Shono, Tatsuya,Kise, Naoki,Fujimoto, Taku,Tominaga, Naoto,Morita, Hiroshi
, p. 7175 - 7187 (2007/10/02)
Electroreduction of γ- and δ-cyano ketones in i-PrOH with Sn cathode gave α-hydroxy ketones and their dehydroxylated ketones as the intramolecularly coupled products.Guaiazulene, (-)-valeranone, polyquinanes, dihydrojasmone, methyl dihydrojasmonate, and rosaprostol have been synthesized by utilizing this electroreductive intramolecular coupling of γ- and δ-cyano ketones in one of the key steps.Similarly, electroreduction of a mixture of ketone and nitrile gave the corresponding intermolecularly coupled product.The product obtained by the electroreductive intermolecular coupling of (+)-dihydrocarvone with acetonitrile has been found to be the precursor of an effective chiral ligand for the enantioselective addition of diethylzinc to aldehydes.