
TY  - JOUR
A1  - Horn, E 
A1  - Jones, GP 
A1  - Prager, RH 
A1  - Snow, MR 
A1  - Ward, AD 
T1  - Trimethyl(3-Oxido-1-Oxoinden-2-Yl)Ammonium, a New 1,4-Dipolar Ylide
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1986
VL  - 39
IS  - 1
SP  - 183
EP  - 187
KW  - 
UR  - https://doi.org/10.1071/CH9860183 
N2  - 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. 
ER  -

