2-Phase medium

Hydrogenolysis of an aldehyde or ketone carbonyl to >CH2 is an important organic transformation, and classical procedures such as the Clemmenson and Wolff-Kishner reactions have limitations (24, 25) heterogeneous catalytic systems and several two-step procedures are also known (1, 24, 26). Our observation of this conversion in what is essentially a 2-phase medium... [Pg.140]

Phase transfer catalysis cf. 30, 645 in 2-phase medium without phase transfer catalyst s. M. Mikolajczyk et al.. Synthesis 1976, 396... [Pg.231]

Interfacial reaction conditions s. 2-Phase medium Introduction... [Pg.285]

Chromium trioxide I hexadecyltrimethylammonium bromide Oxo compds. from alcohols 2-Phase medium s. 44, 233... [Pg.64]

Aq. NaOCl added to a stirred soln. of benzyl alcohol in 0.02 M aq. Na-stearate at room temp., and stirring continued overnight benzaldehyde. Y 90%. The method is very cheap and work-up uncomplicated however, reaction appears limited to arylcarbinols and sec. alcohols in the absence of micelles little or no reaction was observed. F.e., also oxidation with hexadecyltrimethylammonium chromate, or preferably in a 2-phase medium with CrOj/hexadecyltrimethylammonium bromide, s. B. Jursic, Synthesis 1988, 868-71. [Pg.64]

Polyphosphoric acid Thianaphthenes from a-(arylthio)acetals 2-Phase medium... [Pg.192]

Reaction in 2-phase medium, with ether s. 16, 319 with ether-benzene-tetra-hydrofuran, partial oxidation, s. S. Noguchi, M. Imanishi, and K. Morita, Ghem. Pharm. Bull. 12, 1184 (1964)... [Pg.101]

Phase s. a. Solid phase 2-Phase medium, reaction in —... [Pg.345]

Lactams from isonitriles Reaction in 2-phase medium... [Pg.161]

Phase medium 20, 271 suppl. 29 Phase transfer catalysis... [Pg.266]

Phase medium. A suspension of 2-dimethylamino-4,6-bis(ethoxycarbonylhydra-zo)-l,3,5-triazine in methylene chloride covered with aq. NaHCOg, and a slow Clg-current introduced until a red homogeneous methylene chloride phase is obtained 2-diethylamino-4,6-bis(ethoxycarbonylazo)-l,3,5-triazine. Y 95%. F. e. s. Loew and C. D. Weis, J. Heterocyclic Chem. 13, 829 (1976). [Pg.379]

Sodium dichromate/sulfuric acid Ketones from sec. alcohols Reaction in 2>phase medium... [Pg.349]

Pfenninger s. Staudinger Pfitzner-Moffati reagent 21, 284 pH s. Buffer solns.. Regulators 2-Phase medium, reactions in -0-debenzylation, preferential 22,11 oxidation 21, 730 Phenacetyl chloride as reagent 22, 535... [Pg.279]

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