2-Propanone, I-

Thus it is found in the case of propanone (90) that carrying out the reaction in DzO does result in the incorporation of deuterium into the CH3 group of as yet unchanged propanone, i.e. step (2) is no longer rapid with respect to the reversal of step (1). 

A simple synthesis of the branched chain sugar, 2-C-methyl-D,L-lyxofuranoside 17 has been achieved by using the tin(ll) enolate of a I 3-dihydroxy-2-propanone derivative and methyl pyruvate (23). 

These conclusions are borne out by the data on some phosphorylated ketoses83 that cannot form pyranoses or furanoses. 5,6-Dideoxy-D-fhreo-hexulose 1-phosphate (1) contains 96% (by i.r.) or 91% (by n.m.r.) of the keto form, and D-en/fhro-pentulose 1,5-bisphosphate (2) contains 84% (by i.r.) or 88% (by n.m.r. spectroscopy80 ) in aqueous solution in the hydrates, there would be 1,3-parallel interactions. There are no such interactions in the hydrate of l,5-dihydroxy-2-pentanone 1,5-bisphosphate (3), but here one of the carbon atoms vicinal to the carbonyl group carries no hydroxyl group, and there is 84% of the keto form in equilibrium. l,3-Dihydroxy-2-propanone phosphate has two neighboring hydroxyl groups and no 1,3-parallel interactions only 55% is in the keto form and 45% is present as the hydrate.83,84... 

The ultraviolet spectrum of 2-propanone (acetone) is shown in Figure 9-18. The weak absorption, which peaks (i.e., has A.max) at 280 nm, is the result... 

Phenylacetic acid is an immediate precursor of l-phenyl-2-propanone (P-2-P), a substance in Table I of the 1988 Convention that is used in the manufacture of amphetamine and methamphetamine. Concerned by the increase in seizures of phenylacetic acid and illicitly manufactured P-2-P, the Board instructed its advisory expert group2 to review the situation. The review, conducted in October 2006, found that the illicit manufacture of both amphetamine and methamphetamine appeared to be on the rise, posing a threat to public health and lying at the root of other social problems. The Board concluded that the controls required for the substances in Table II of the Convention were insufficient to prevent diversions of phenylacetic acid. On that basis and having assessed the relevant comments and supplementary information provided by Governments pursuant to article 12 of the Convention, the Board submitted a communication to the Secretary-General in January 2007 to formally initiate the procedures for the transfer of phenylacetic acid from Table II to Table I of the Convention. 

The glyceritol phosphate (VI) has the 1-0-phospho-D (that is, 3-0-phos-pho-L) configuration since it is oxidized by Codehydrogenase I ( diphospho-pyridine nucleotide ) in the presence of glycerophosphate dehydrogenase (specific toward L-3-glycerophosphate ) to 1,3-dihydroxy-2-propanone phosphate. 

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