8- -3,7-dimethy

X-ray analysis of 2-phenylmethylaraino-5-phenyl-A-2-thiazoline-4-one (176), which exists in the keto form in the solid state (420), and of 4,4 -diacetoxy-5,5 -dimethy]-2,2 bithiazolyl (177) (419) are available as model compounds for theoretical calculations (Scheme 92). 

Alkyl selenazoles have been sulfonated. Thus 2,4-dimethylselenazole with fuming sulfuric acid (5% SO3) at 100°C gives 2.4-dimethy -5-sulfonylselenazole [m.p. 238 C (decomp.) (26)], which is relatively unstable. decomposing to give metallic selenium. 

Terpolymers from dimethy]-a.-methy]styrene (3,4-isomer preferred)—a-methylstyrene—styrene blends in a 1 1 1 weight ratio have been shown to be useful in adhesive appHcations. The use of ring-alkylated styrenes aids in the solubiHty of the polymer in less polar solvents and polymeric systems (75). Monomer concentrations of no greater than 20% and temperatures of less than —20° C are necessary to achieve the desired properties. 

Methyl Carbamate 5. 9-Fluorenylmethyl Carbamate 8. 2,2,2-Trichloroethyl Carbamate 11. 2-Trimethylsilylethyl Carbamate 16. 1,1-Dimethylpropynyl Carbamate 20. 1-Methyl-1-phenylethyI Carbamate 22. 1-Methyl-l-(4-biphenylyl)ethyl Carbamate 24. 1,1 -Dimethy 1-2-haloethyl Carbamate 26. l,l-Dimethyl-2-cyanoethyl Carbamate 28. r-Butyl Carbamate... 

In a 1-1, three-necked, round-bottomed flask equipped with a calcium chloride drying tube, a mechanical stirrer, and a ground-glass stopper are placed 28.2 g. (0.184 mole) of freshly distilled methyl bromoacetate, 500 ml. of anhydrous iV,iV-dimethy]acetamide (Note 1), and 20.0 g, (0.168 mole) of methyl nitroacetate (Note 2). The solution is stirred vigorously while 146 ml. (0.168 mole) of 1.15N sodium methoxide in... 

N,N -Dimethy l-ZV.A -dinitrosoterephthalamide (V) Terephthalamide N2,H20, CO2 90-105 180 Low exotherm on decomposition but low decomposition temperature restricts use largely to open-cell foams. 

Most stable conformation of cis-1,3 -dimethy Icy clohexane (no axial methyl groups)... 

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