Acute surgical abdomen in patients 80 years or older has a unique distribution of diagnoses. Although an increase in temperature and marked leukocytosis are not diagnostic of any particular illness, their presence should suggest certain specific surgical illnesses to the practicing clinician. Frequently, elderly patients with acute surgical abdomens present with a normal temperature and leukocyte count.
Details concerning the formation of an oxy radical by ozonation of trimesitylvinyl alcohol are given. Evidence is presented for a mechanism by which the radical is produced, involving a r complex at one of the mesityl groups of trimesitylvinyl alcohol. Ozonation of 2,2-dimesitylvinyl alcohol at -150°also produces an oxy radical in good yield. The radical is isolated in the form of its dimer. Ozonation of 2,2-dimesitylvinyl alcohol at -78°affords no appreciable amount of the dimer. In contrast to these results, ozonation of 2-mesityl-2-phenylvinyl alcohol gave no sign of a radical or its dimer even at -150°.
Another possibility is that 3 and 4 produce the same products because they each undergo addition of HOAc followed by elimination of HI. This is rendered very unlikely by the observation that the vinyl acetate product formed from cyclopropyl vinyl iodide13 in AgOAc-DOAc contains no deuterium by nmr, ir, and mass spectral analysis (unpublished results of S. A. Sherrod and R. G. Bergman).(7) (a) D. J. Cram, "Fundamentals of Carbanion Chemistry," Academic Press, New York, N. Y" 1965, pp 130-135; (b) D. H. Hunter and D.
In Methylenchlorid/Methanol reagiert der Alkohol (I) mit Ozon im Stickstoffstrom bei ‐78°C zum Radikal (II) (etwa 50%), das bei höheren Temperaturen unter H‐Aufnahme den Alkohol (I) zurückbildet.
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