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of 87
pro vyhledávání: '"Karl Bernauer"'
Publikováno v:
Helvetica Chimica Acta. 77:615-621
A crude hydrate 6 and a crystalline hemiacetal 7 of glyoxylamide 4 were prepared from crotonamide 5 (Scheme 2). Particularly hemiacetal 7, but also 6 and the ‘dimer’ 8 (obtained from 7) may serve as homochiral auxiliaries. The structure of 8 was
Publikováno v:
ChemInform. 23
Publikováno v:
ChemInform. 25
Publikováno v:
Helvetica Chimica Acta. 75:282-287
Tryptimines of type 7 form with various acyl halogenides EX preferentially tricycles of type 8 (cf: Scheme 2). The homochiral imines 9 and 17 are transformed into (2′R,3S)-configurated products. The synthetic and mechanistic importance of these res
Publikováno v:
Helvetica Chimica Acta. 73:439-454
C-(Alkoxycarbonyl)formimines of type 15–18 were derived from the 2-substituted tryptamines 2, 9, 10, and 11 and transformed with tosyl chloride into tricyclic 3-spiroindoles of types 19–22 (Scheme 3). The influence of the homochiral alkoxy moieti
Publikováno v:
Helvetica Chimica Acta. 88:3274-3275
Publikováno v:
ChemInform. 21
Publikováno v:
Helvetica Chimica Acta. 65:2645-2667
Derivatives of 3-Quinolinecarboxylic Acid with Oxygen Substitution in Positions 4, 5 and 8: Synthesis, Reactions, NMR. Studies Starting from either 1, 4-dibenzyloxybenzene (7) or 2, 5-dimethoxyaniline (16), synthetic routes have been developed to ben
Autor:
Karl Bernauer, Peter Zeltner
Publikováno v:
Helvetica Chimica Acta. 66:1860-1864
1-[(Dimethylamino)methyl]pyrrole from Trimethyl (1-pyrrolyl)ammonium Ion Trimethyl (1-pyrrolyl)ammonium iodide (5a) and the corresponding p-toluene-sulfonate 5b are transformed by strong bases into 1-[(dimethylamino)methyl]-pyrrole (9), i.e. into a N
Autor:
Manfred Hesse, Peter Van Den Broek, Armin Guggisberg, Hans Schmid, Fernand Schneider, Karl Bernauer
Publikováno v:
Helvetica Chimica Acta. 59:3013-3025
Synthesis of the Macrocyclic Spermidine Alkaloids Oncinotine, Neooncinotine, Isooncinotine and Pseudooncinotine in Racemic Forms. The four isomeric spermidine alkaloids (Scheme 1) mentioned in the title were synthesized as follows: Reaction of the pi