177217-34-4Relevant academic research and scientific papers
Catalytic asymmetric [3+2] cycloaddition of azomethine ylides. Development of a versatile stepwise, three-component reaction for diversity-oriented synthesis
Chen, Chuo,Li, Xiaodong,Schreiber, Stuart L.
, p. 10174 - 10175 (2007/10/03)
We report a new catalyst system that should enhance the use of enantioselective 1,3-dipolar cycloadditions of azomethine ylides with electronic-deficient olefins in the divergent pathways of diversity-oriented synthesis (DOS). The underlying reaction is o
Sodium borohydride: A versatile reagent in the reductive N-monoalkylation of α-amino acids and α-amino methyl esters
Verardo, Giancarlo,Geatti, Paola,Pol, Elena,Giumanini, Angelo G.
, p. 779 - 788 (2007/10/03)
α-Amino acids and α-amino methyl esters are easily converted to their N-monoalkyl derivatives by a reductive condensation reaction using several carbonyl compounds in the presence of sodium borohydride. This reducing agent has shown a wide versatility with minor but essential procedural variations. The reaction allows the α-monodeuterium labeling of the new N-substituent by use of sodium borodeuteride.
Process for the preparation of alpha-dimethylaminomethyl-tryptophan methyl ester
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, (2008/06/13)
The invention is concerned with a process for the preparation of α-dimethylaminomethyltryptophan methyl ester, wherein (S)-2-benzylidene-amino)-3-(1H-indol-3-yl)-propionic acid methyl ester is reacted with 1-dimethylaminomethylbenzotriazole to give racemi
Pictet-Spengler/palladium catalyzed allenylation and carbonylation processes
Grigg,MacLachlan,MacPherson,Sridharan,Suganthan,Thornton-Pett,Zhang
, p. 6585 - 6594 (2007/10/03)
The tactical combination of the Pictet-Spengler reaction with Pd catalyzed reactions with allene and with carbon monoxide provides rapid access to a range of tetrahydro-β-carboline and tetrahydroisoquinoline derivatives via intramolecular trapping of inte
Asymmetric synthesis of highly functionalized tetracyclic indole bases embodying the basic skeleton of yohimbine-and reserpine type alkaloids
Lock, Ralf,Waldmann, Herbert
, p. 2753 - 2756 (2007/10/03)
Schiff bases derived from tryptophan methyl ester react with differently substituted electron-rich siloxy dienes in the presence of achiral or chiral boric acid esters to give enaminones 5 and 6 with high diastereomer ratios (up to >98:2). These intermedi
Asymmetric Synthesis of Indoloquinolizidin-2-ones Congeners to Yohimbine-Type Alkaloids
Waldmann, Herbert,Braun, Matthias,Weymann, Markus,Gewehr, Markus
, p. 397 - 416 (2007/10/02)
Schiff bases derived from tryptophan methyl ester and tryptamine react with Danishefkys diene in the presence of ZnCl2 to give enaminones which are subsequently transformed into indoloquinolizidin-2-ones by acid-catalyzed cyclization.These tetracyc
