1-Ethy 1-3-

A-9. Which has the lower heat of combustion, cis-1 -ethy 1-3-methylcyclohcxanc or d.v-l-ethyl-4-methylcyclohexane ... 

C7HgN402. Occurs to a small extent in tea, but is chiefly prepared synthetically. Like caffeine, it is a very weak base which forms water-soluble compounds with alkalis. It has a similar pharmacological mechanism to that of caffeine and is used, in combination with ethy-lenediamine. as a diuretic and a bron-chodilator. 

Rhodacyanines possess two chromophoric systems. They are at the same time neutrocyanine derivatives, which involves position 5 of the ketomethylene, and methine cyanine, which involves position 2. Following lUPAC s standard nomenclature rules, structure 7 is named 3-ethyl-4-phenyl-2- 4-oxo-3-ethyl-5-[2-(3-ethy]-2,3-dihydro-benzo-l,3-thiazo-lylidene)ethylidene]-tetrahydro-l,3-thiazolylidene-methyl -1.3-thiazolium iodide (Scheme 5). It implies that the 4-phenyl thiazole ring having the... 

Property Copolymer of ethylene and 1-butene Copolymer of ethy and 1-octene... 

Federal name O Glycero 1 CH3O H C3H3O H Petroleu m jelly Toluen e Steari c acid Olei c acid Mineral oil Ethy 1 ethe r Aceton e Butyl acetate... 

Reaction of Alcohols with Diethyl (2-chloro-1,1,2-trifluoro-ethy ) amine... 

S ) -3/3-Hydroxy-16a, 17 a-ethylene-18,20-cyclopregn-5-en-20-ol 3 -acetate, 349 3 /3-Hydroxy-16a, 17 a-ethylene-16 -niethy 1-enepregn-5-en-20-one acetate, 349 3 -Hydroxy-16a, 17 a-ethy lene-17 -methyl-enepregn-5-en-20-one acetate, 349 3/3-Hydroxy-16a, 17a-ethylenepregn-5-en-20-one acetate, 349... 

Derivatives of 1 -ethy l-7-alkylamino-6-nitro-4-oxo-1,4-dihydroquinoline-3-carboxylic acid 137 have been reduced to corresponding diamines 138 and afterwards converted exclusively to linearly annelated imidazo[4,5-g]quinoline-7-carboxylic acid derivatives 139 (Scheme 43) (88KFZ33). 

Chemical Name [ (3-(2-(Diethylamino)ethy ] -4-methyl-2-oxo-2H-1 -benzopyran-7-yl] oxy) acetic acid ethyl ester hydrochloride... 

Ethy I-p-hydroxy benzoate Cyclohexyl bromide 3-(2 -Methylplperidino)propyl chloride... 

Bis (3-Hydroxy propy I )ethy I ene diamine 1,3-Chlorobromopropene Triethylamine... 

Chemical Name Sulfobutanedioio acid 1,4-bis(2-ethy hexyl)ester calcium salt Common Name Dioctyl calcium sulfosuccinate Structural Formula ... 

Preparation of 5a,6a-0xido-17a-Hydroxya//opregnane-3,20-dione 3,20-Bis-(Ethy ene Ketal) A solution was prepared by heating 19.96 g (0.0477 mol) of 17a-hydroxyprogesterone 3,20-bis-(ethylene ketal) and 500 ml of benzene. After the solution was effected the flask was cooled to 5°C and a mixture of 3.68 g (0.0449 mol) of sodium acetate and 174 ml of 40% peracetic acid was added with stirring. The reaction mixture was stirred in the ice bath for 3 hours. The lower peracid layer was separated, diluted with water and extracted twice with benzene. 

A solution of 0.144 g of the 3-ethy ene glycol ketal of 5Q ,1 1/3,17Q ,21-tetrahydroxy-6/3-fluoro-16Q -methylallopregnane-3,20-dione 21-acetate in 12 ml of chloroform and 0.1 ml of absolute alcohol was cooled to -10°C in an ice-salt bath and a stream of anhydrous hydrochloric acid was gently bubbled through the solution for 2.5 hours while the temperature was maintained between -5°Cand -15°C. The solution wasthen diiuted with 25 ml of chloroform, washed with dilute sodium bicarbonate and water, dried over anhydrous sodium sulfate, and evaporated to dryness under reduced pressure at BO t or less to give 60 -fluoro-11/3, 170 ,21 -trihydroxy-16Q -methyl-4-pregnene-3,20-dione 21-acetate. 

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