A. A. Lyapunov (on his 60th birthday)

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1. Hydroxy groups located on one ring Only one ketone possible, not yet described. 2. wt. 22 Synthesis -Preparation by reaction of gallic acid with pyrocatechol in chlorobenzene in the presence of methanesulfonic acid for 6 h between 65 to 75° (90%) or by using boron trifluorideetherate instead of methanesulfonic acid as catalyst (10%). -Refer to: Chem. , 108, 204327v (1988). p. and Spectra (NA). 5 h (65%) [507]; *in the presence of zinc chloride and a mixture of polyphosphoric acid/85% phosphoric acid (60:40) at 27°.

T. for 4 h (86%) [746]. p. 165-167° [746]; 1 H NMR [746]. wt. 68 Synthesis -Obtained by hydrolysis of 2-benzoyl-4-chloro-6-hydroxybenzanilide with refluxing 2 N aqueous sodium hydroxide for 5 h (80-82%) [457, 746]. -Also refer to: [1209]. p. 166-168° [457], 166-167° [746]; *H NMR [457]. wt. 68 Synthesis -Preparation by adding acetic anhydride to an ice cooled solution of 2-amino-5-chloro-4-methoxybenzophenone in 57% aqueous hydriodic acid and heating the resulting mixture at reflux for 12 h (75%) [746].

P. and Spectra (NA). wt. wt. 23 Synthesis -Not yet described. Isolation from natural source -Major metabolite appearing mainly as conjugated compound, in the urine of rabbits fed nitrazepam. It was isolated after enzymatic hydrolysis with p-glucuronidase. -Refer to: Chem. , 85, 116484v (1976)*; 90, 197343b (1979)*. p. (NA); 1 H NMR*, IR*, UV*, MS*. wt. 24 Synthesis -Preparation by treatment of 4-benzoyl-2,3-dihydrobenzoxazol-2-one (SM) with refluxing 20% hydrochloric acid for 10 h (68%). SM was obtained by UV light irradiation of N-benzoyl-2,3-dihydrobenzoxazol-2-one in acetonitrile for 48 h (21%) [627].

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