B 4-methyl

The reaction of N bromosuccimmide with the following com pounds has been reported in the chemical literature Each compound yields a single product in 95% yield Identify the product formed from each starting material (a) p-tert Butyltoluene (b) 4 Methyl 3 nitroanisole... 

Fig. 5. Ultraviolet spectra of the cations of 2-aminopteridines (A) unsubstituted, (B) 4-methyl, and (C) 4,7-dimethyl.

Die aus Alkoholen mit Thionylchlorid erhaltlichen Chlorsulfite werden durch Na-triumboranat in Athanolzu Kohlenwasserstoffen reduziert5,6 z.B. 4-Methyl-benzoin zum 1 -Oxo-2-phenyl-I-(4-methyl-phenyl)-athan (74% d.Th.)6 ... 

Zum Ersatz einer Sulfonyloxy-Gruppe (z. B. 4-Methyl-bcnzolsulfonyloxy-Gruppe) durch die unsubstituierte Amino-Gruppe unter schonenden Bedingungen kann auch Natrium-amid in fliissigem Ammoniak verwendet werden, z. B. zur Synthese von 3-Amino-4-phenyl-1-but in... 

C3S2 s s — — — l,2-Dithiolane-4-carboxylic acid b3-phenyl-1,2-dithiolylium iodide b 4 methyl-l,2-dithiole-3-thioneb... 

As to the B/branched a-olefin copolymers, the degree of cocrystallization falls progressively with the size of the comonomer units. Apart from the B/3MB system, already discussed, in the B/4-methyl-pentene-l copolymers partial isomorphous replacement of monomer units in the two homopolymer crystal phases is observed, with lattice dimensions changes (Table 1). With 4,4 -dimethyl-pentene-l both homopolymer phases occur, physically separated, without lattice dimension changes. In each case, for high butene contents, the PB II phase is observed, i.e. the phase with larger CSA, which indicates that at least some degree of cocrystallization is always present. 

Figure 2. Packing Arrangement of (a) 7-Chlorocoumarin and (b) 4-Methyl 7-chlorocoumarin.

B.4. Methyl Acetate System, Steady-State Distillation... 

Draw structures for these compounds a) 2-Methylcyclohexanol b) 4-Methyl-4-penten-2-ol... 

Draw the structural formulae of the given allqmes. a. 4,4-dimethyl-l-pentyne b. 4-methyl-2-pentyne... 

Starting from iodobenzene, describe a synthetic route to each of the following compounds (a) 2-phenylbutan-2-ol (b) 4-methyl-benzophenone (c) 3-nitrobenzoic acid (d) 1-phenylbutan-l-ol. 

B. 4-Methyl-6-hydroxypyrimidine. To a hot solution of 10 g. (0.07 mole) of 2-thio-6-methyluracil in 200 ml. of distilled water and 20 ml. of concentrated aqueous ammonia in a 500-ml. round-bottomed flask is added 45 g. (wet paste) of Raney nickel catalyst (Note 3). About 30 ml. of distilled water is used to wash all the nickel catalyst into the reaction flask. The mixture is heated under reflux in a hood for about 1.5 hours. The catalyst is permitted to settle, and the clear solution is decanted and filtered by gravity. The catalyst is washed with two 75-ml. portions of hot water and is discarded (Note 4). The combined filtrate and washings (Note 5) are evaporated to dryness on a steam bath. The residue is placed in an oven at 70° to complete the drying process (Note 6). The yield of crude pyrimidine, m.p. 136-142°, is 7.0-7.2 g. (90-93%). 

TEMPERATURE = AZS-C, CONTACT TIME = 2.64-2.92Sec. O total PYRDie BASES A 2- METHYL PYRIDINE B 4-METHYL PYRDie... 

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