Flash vacuum pyrolysis of stabilised phosphorus ylides. Part 3. Preparation of o-methoxyphenyl- and o-methylsulfanylphenyl-alkynes and their cyclisation to benzofurans and benzothiophenes
作者:R. Alan Aitken、Graham Burns
DOI:10.1039/p19940002455
日期:——
loss of Me· and cyclisation of the resulting radicals to afford 2-substituted benzofurans or benzothiophenes 17–24. Where the substituent R1 on the ylidic carbon of the starting material is phenyl, this is incorporated unchanged into the heterocyclic products. Where R1 is Et or Pri the vinyl products are formed by intramolecular abstraction of a β-hydrogen atom following cyclisation. For R1= Me, Pr
Aitken R. Alan, Burns Graham, J. Chem. Soc. Perkin Trans., (1994) N 17, S 2455-2460
作者:Aitken R. Alan, Burns Graham
DOI:——
日期:——
AITKEN, R. ALAN;BURNS, GRAHAM, TETRAHEDRON LETT., 28,(1987) N 32, 3717-3718
作者:AITKEN, R. ALAN、BURNS, GRAHAM
DOI:——
日期:——
Fe-Catalyzed Cycloisomerization of Aryl Allenyl Ketones: Access to 3-Arylidene-indan-1-ones
作者:Johannes Teske、Bernd Plietker
DOI:10.1021/acs.orglett.8b00612
日期:2018.4.20
A cycloisomerization of aryl allenylketones to 3-arylidene-indan-1-ones using a cationic Fe-complex as a catalyst is reported. The catalyst opens a synthetically interesting reaction pathway to this surprisingly underrepresented class of indanones that are not accessible using alternative catalytic systems.
A new synthesis of 2-substituted benzofurans and benzothiophens: Novel fragmentation reactions of simple alkyl groups
作者:R.Alan Aitken、Graham Burns
DOI:10.1016/s0040-4039(00)96366-4
日期:1987.1
Flashvacuumpyrolysis of (2-methoxy- and (2-methylthiobenzoyl)alkylidenetriphenylphosphoranes results in loss of Ph3PO and methyl radical; cyclisation of the resulting radical intermediates leads to benzofurans and benzothiophens in which the 2-substituents have undergone novel fragmentation processes.