Steric effects in intramolecular [2+2] photocycloaddition of CC double bonds to cyclohexenones.
作者:D. Becker、N. Haddad
DOI:10.1016/s0040-4020(01)80336-7
日期:1993.1
The effect of substituents on the mode of approach and the endo/exo ratio in intramolecular [2+2] photocycloaddition reactions were studied.
研究了取代基对分子内[2 + 2]光环加成反应中接近方式和内/外比的影响。
Pd<sup>II</sup>-Catalyzed Spiroketalization of Ketoallylic Diols
作者:Jean A. Palmes、Paulo H. S. Paioti、Leonardo Perez de Souza、Aaron Aponick
DOI:10.1002/chem.201301723
日期:2013.8.26
at 0 °C, these dehydrative cyclization reactions require only mild conditions to produce vinyl‐substituted spiroketals in high yields after brief reaction times with water as the only byproduct. Using this method, the stereochemical information embedded at the nucleophile is transmitted “down‐the‐chain” and efficiently sets the stereochemistry at both the anomeric carbon atom and the newly formed allylic
Palladium-catalyzed remote arylative substitution was achieved for the reaction of arylboronic acids with alkenes possessing a distant acetoxy group via nondissociative chain walking and β-acetoxy elimination.
The present invention relates to methods of treating parasitic diseases which are mediated by cysteine proteases by administration of 4-amino-azepan-3-one protease inhibitors. In particular, the present invention relates to a method of treating malaria by inhibiting the cysteine protease falcipain.
This invention relates to derivatives of fused tricyclic lactams, to the intermediates and processes useful for their preparation and to their pharmacological effect in inhibiting the angiotensin converting enzyme and to their end-use application in the treatment of hypertension.