The diels-alder reaction of isoprene with 2-oxoindolin-3-ylidene derivatives
作者:C.G. Richards、D.E. Thurston
DOI:10.1016/s0040-4020(01)88693-2
日期:1983.1
The Diels-Alderreaction of isoprene with eight 2-oxoindoline-3-ylidene derivatives is discussed and the structure and conformation of the adducts assigned by the use of 270 MHz PMR spectroscopy. Some transformations of the adducts are also described.
On the Reaction of Isatin with Cyanomethylene(triphenyl)-phosphorane. A Nucleophilic Attack of Alkyl Phosphites on the Carbon–Carbon Double Bond of (E)-Oxindolylideneacetonitrile
作者:Fayez H Osman、Fatma A El-Samahy
DOI:10.1016/s0040-4020(99)01065-0
日期:2000.3
The reaction of cyanomethylene(triphenyl)phosphorane (2) with isatin (1) in dry benzene at room temperature for 1 h led to the formation of (1,2-dihydro-2-oxo-3H-indol-3-yl)acetonitrile as a mixture of E- and Z-stereo isomers 3 and 4. Trialkyl phosphites 7 reacted with (E)-nitrile 3 in dry benzene at 70°C for about 10 h to give the phosphonates 8 as two isomers together with the unexpected spiro products
Cross-conjugated trienamines are introduced as a new concept in asymmetric organocatalysis. These intermediates are applied in highly enantioselective Diels-Alder and addition reactions, providing functionalized bicyclo[2.2.2]octane compounds and gamma'-addition products, respectively. The nature of the transformations and the intermediates involved are investigated by computational calculations and NMR analysis.
RICHARDS, C. G.;THURSTON, D. E., TETRAHEDRON, 1983, 39, N 10, 1817-1821
作者:RICHARDS, C. G.、THURSTON, D. E.
DOI:——
日期:——
LONG D. R.; RICHARDS C. G.; ROSS M. S. F., J. HETEROCYCL. CHEM., 1978, 15, NO 4, 633-636