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ChemInform Abstract: Highly Diastereo- and Enantioselective Synthesis of syn-β-Substituted Tryptophans via Asymmetric Michael Addition of a Chiral Equivalent of Nucleophilic Glycine and Sulfonylindoles.

✍ Scribed by Jiang Wang; Shengbin Zhou; Daizong Lin; Xiao Ding; Hualiang Jiang; Hong Liu


Publisher
John Wiley and Sons
Year
2011
Weight
50 KB
Volume
42
Category
Article
ISSN
0931-7597

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✦ Synopsis


Abstract

The asymmetric Michael addition of a chiral Ni(II) complex of a Schiff base of glycine (I) with a broad range of sulfonylindoles offers a simple and mild protocol for the preparation of syn‐configured β‐substituted tryptophans.


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ChemInform Abstract: Asymmetric Michael
✍ D. Enders; Pascal Teschner; Robert Groebner; Gerhard Raabe 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 31 KB 👁 2 views

Asymmetric Michael Additions via 6-and 7-Membered Lactone SAMP-Hydrazones: Diastereo-and Enantioselective Synthesis of Substituted Lactone Esters. -High asymmetric inductions are achieved in the Michael addition of hydrazones (I) to α,β-unsaturated esters (II). Removal of the chiral auxiliary by ozo