
%0 Journal Article
%A Horn, E 
%A Jones, GP 
%A Prager, RH 
%A Snow, MR 
%A Ward, AD 
%T Trimethyl(3-Oxido-1-Oxoinden-2-Yl)Ammonium, a New 1,4-Dipolar Ylide
%J Australian Journal of Chemistry
%D 1986/01/01
%V 39
%N 1
%P 183-187
%K 
%R https://doi.org/10.1071/CH9860183
%U https://www.publish.csiro.au/paper/CH9860183 
%X Reaction of isobenzofuran-1(3H)-one ( phthalide ) and its derivatives with dimethylformamide  dimethyl  acetal in the presence of base gives small amounts (c. 10%)1 of the ylid  trimethyl (3-oxido-1-oxoinden-2- yl )ammonium (3). The same compound is formed in higher yield from the corresponding 3-dimethylaminomethyleneisobenzofuran-1(3H)-one. Support for this structure comes from chemical degradation and its mode of synthesis, but relies mainly on X-ray crystallography. The title compound crystallizes as clear prisms in the monoclinic space group P21/n with a 15.992(2), b 9.329(4), c 7.112(3)&#506;, &#946; 90.15(3)&#176; and Z 4. The structural final refinement of a full-matrix least-squares calculation converged with R 0.044 and Rw 0.045. 
