In-situ Iodination of Organoarsenic Homocycles: Facile Synthesis of 9-Arsafluorene
作者:Takuji Kato、Susumu Tanaka、Kensuke Naka
DOI:10.1246/cl.150657
日期:2015.11.5
We developed an in-situ iodination of organoarsenic homocycles for facile and general As–C bond formation. Quantitative in-situ generations of arsenic diiodides from organoarsenic homocycles and iodine were confirmed by 1H NMR analysis. 9-Phenyl- and 9-methyl-9-arsafluorenes were prepared by this method and their optical properties were studied.
Efficient catalytic arsa‐Wittig reactions have been developed by using 1‐phenylarsolane as a catalyst. A wide array of aldehydes was converted to the corresponding olefins in high yields with moderate to excellent E stereoselectivity in the presence of a catalytic amount of 1‐phenylarsolane. Moreover, density functional theory calculations were carried out to afford insight into the E/Z selectivity
(n-PMC), depending on the recrystallization solvents. Vapor exposure can cause reversible crystal-to-crystal transition between the PMC and the n-PMC. The PMC exhibits open–close switching of porosity as well as on–offswitching of luminescence.