Baker Chemical

Magneslun turnings, purified for Grignard reactions, are purchased from J. T. Baker Chemical Company, and used without further purification. 

T.J. Baker, Chemists, HPLC Solvents Reference Manual, T.J.Baker Chemical Co., 1985. 

The checkers used phosphorous pentachloride purchased from the J. T. Baker Chemical Company the submitters used phosphorous pentachloride purchased from Eastman Organic Chemicals. 

Cinnamaldehyde dimethylacetal is prepared by the method used to prepare the corresponding diethylacetal. A mixture of 66.0 g. (0.5 mole) of Aldrich Chemical Company, Inc.), 100 g. (1.06 mole) of trimethyl orthoformate (Eastman Organic Chemicals), 450 ml. of anhydrous methanol (J. T. Baker Chemical Company), and 0.5 g. ofp-toluenesulfonic acid monohydrate (Fisher Scientific Company) is stirred at room temperature for 24 hours. At the end of this time the alcohol is removed with a rotary evaporator and the residue is distilled to give 81-83 g. (91-93%) of cinnamaldehyde dimethylacetal, b.p. 93—96° (0.2 mm.). 

Alfa Inorganics, Inc., 8 Congress St., Beverly, Mass. J. T. Baker Chemical Co., Phillips-burg, N.J. or Matheson, Coleman and Bell, 2909 Highland Ave., Norwood, Ohio. 

Chromium trioxide (obtained from J. T. Baker Chemical Company) is stored in a vacuum desiccator over phosphorus pentoxide prior to use. Six-mole equivalents of oxidant is required for rapid, complete conversion to aldehyde. With less than the 6 1 molar ratio, a second, extremely slow oxidation step occurs (see reference 7). 

Tctrahydrofuran (purchased from Fluka AG or J. T. Baker Chemical Company) is distilled from sodium hydride prior to use. For warnings regarding the purification of tetrahydrofuran, see Org. Syn., Coll. Vol. 5, 976 (1973). 

Acetonitrile was purchased from Fluka AG or J. T. Baker Chemical Company and was distilled from potassium carbonate immediately prior to use. 

The submitters used Baker-grade triethylamine purchased from J. T. Baker Chemicals N.V., P.O. Box 1, Deventer, Holland, after distillation from potassium hydroxide. 

The submitters purchased trifluoroacetic acid from Prolabo, Paris, France, or E. Merck, Darmstadt, Germany, and distilled it from phosphorous pentoxide. This-reagent is also available from Aldrich Chemical Company, Inc., and J. T. Baker Chemical... 

T. Baker Chemicals were used. The arsenic metal powder was Imbedded in indium foil for examination. An arsenic mirror formed on a reaction flask was also examined. 

Solutions. Solutions of ferrlcyanlde (Baker Chemical Co., Phllllpsburg, NJ) were prepared In 1.0 M KCl (Mallnckrodt, Paris, KY). Ascorbic acid solutions were prepared In 0.1 H phosphate buffer adjusted to pH 2.0. All solutions were prepared with triple distilled water. Solution preparation precautions have been previously described (15). 

The naphthalene extraction experiment was carried out under similar conditions except that nitrogen was used as cover gas instead of deuterium. The spent naphthalene-d8 was separated from the residue by distillation at reduced pressure. The residue was solvent fractionated with tetrahydrofuran (J. T. Baker Chemical Co.). 

Baker Chemical Laboratory, Cornell University Read before the Academy, Tuesday, November 15, 1932... 

---