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Dirk Trauner

Publications and source records attributed to Dirk Trauner.

45 records · Page 3Linked to original sources
PubMed2002

Borane-ammonia complexes stabilized by hydrogen bonding.

Novel boron-ammonia complexes, wherein an NH(3) molecule is tightly bound through all four of its atoms, have been prepared and studied. The solid-state structure of ortho MOM-phenyllithium is reported. [reaction: see text]

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PubMed2001

The B-Alkyl Suzuki-Miyaura Cross-Coupling Reaction: Development, Mechanistic Study, and Applications in Natural Product Synthesis A list of abbreviations can be found at the end of the article.

The development of new reactions that facilitate the creative and efficient synthesis of molecular structures with desirable properties continues to fascinate chemists. The test of a significant contribution is its acceptance over time by the scientific community. The B-alkyl Suzuki-Miyaura cross-coupling reaction appears to be one such reaction. Since its disclosure by Suzuki and Miyaura in 1986, this reaction has been an attractive solution to challenging synthetic problems.

Journal Article↗
PubMed2001

Concise Stereoselective Routes to Advanced Intermediates Related to Natural and Unnatural Pinnaic Acid This work was supported by the National Institutes of Health (Grant Numbers: CA28824). Postdoctoral Fellowship support is gratefully acknowledged by M.W.C. (U.S. Army BCRP, DAMD17-98-1-8154), M.F.H. (5T32 CA62948-05), and D.T. (Schering Research Foundation, Berlin). We thank Dr. George Sukenick of the MSKCC NMR Core Facility for NMR and mass spectral analyses.

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Journal Article↗
PubMed1998

Synthesis of Enantiomerically Pure Morphine Alkaloids: The Hydrophenanthrene Route.

A concise, linear, total synthesis of (-)-dihydrocodeinone-a close synthetic precursor of (-)-codeine and (-)-morphine-has been achieved. The carbocyclic core of the alkaloid was provided in the form of a phenanthrenone, which was resolved by chromatography on cellulose triacetate. A cuprate conjugate addition was used to establish the crucial benzylic quaternary stereocenter and to introduce the C(2)-side chain. Dimeric byproducts provide evidence for a single electron transfer (SET) mechanism. Unusual S(N)2 and radical cyclizations were employed for the formation of the dihydrobenzofuran and the piperidine ring, respectively.

Journal Article↗