## Abstract The asymmetric synthesis of α‐substituted α‐amino acids and propargylamines is described. As chiral auxiliary we used (__S__)‐(–)‐1‐dimethoxymethyl‐2‐methoxymethylpyrrolidine (SDMP, **1**). Treatment of the amino acids or amines with SDMP **1** afforded the corresponding amidines **C**,
Asymmetric carbon—carbon bond formation by phase-transfer catalysis; synthesis of optically active 3-substituted dihydroisocarbostyrils
✍ Scribed by Toshio Wakabayashi; Kenzo Watanabe
- Publisher
- Elsevier Science
- Year
- 1978
- Tongue
- French
- Weight
- 133 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0040-4039
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✦ Synopsis
Recent investigations have demonstrated that phase-transfer catalysis has a considerable potential in synthetic organic chemistry. 1 The alkylation2 of Bdicarbonyl compounds and the Wittig-Homer' reaction of carbonyl compounds have led to interesting results, but no successful examples of reactions involving asymmetric carbon-carbon bond formation have been acknowledged yet. 4
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