42101-92-8Relevant academic research and scientific papers
Parallel mechanisms for the cycloaromatization of enyne allenes
Hughes, Thomas S.,Carpenter, Barry K.
, p. 2291 - 2298 (2007/10/03)
The Myers-Saito cycloaromatization of enyne allenes is proposed to consist of two parallel mechanisms, one involving a biradical and the other with dipolar character. MCSCF calculations suggest that a nonplanar cyclic allene could be fairly close in enthalpy to the biradical, while the planar zwitterion originally proposed as a possible second intermediate is in fact a transition state for the interconversion of the two enantiomeric cyclic allenes. Competitive trapping experiments rule out the presence of a single intermediate and are consistent with the participation of parallel pathways. The reaction of (Z)-hepta-1,2,4-trien-6-yne in cyclopentadiene gave an inseparable mixture of two tetracyclic products whose structures were elucidated with 2-D NMR.
Generation of Organic Cations from Group 14 Organometallic Compounds via Photoinduced Electron Transfer in the Presence of Cu(II) Salt
Mizuno, Kazuhiko,Yasueda, Masahiro,Otsuji, Yoshio
, p. 229 - 232 (2007/10/02)
Irradiations of acetonitrile-alcohol (3:1) solutions of arylmethyl silanes, germane, or stannanes in the presence of Cu(BF4)2 gave alkyl arylmethyl ethers in good yields via arylmethyl cations, The efficiency of this photoreaction increased in the order of Si- Ge- Sn-compounds.
