## Abstract The organocatalytic asymmetric Michael addition of 2,2‐dimethyl‐1,3‐dioxan‐5‐one (**1**) was performed with various nitro alkenes **2** using a number of proline‐based catalysts (**A**–**M**) affording polyfunctional nitro ketones **3**. Reverse diastereoselectivity was observed with th
✦ LIBER ✦
Synthesis of (±)-branched-chain azaisonucleosides via Michael addition of 5-nitro-2,2-pentamethylene-1,3-dioxane to methyl 2-bromoacrylate
✍ Scribed by Ewa Mironiuk-Puchalska; Ewa Kołaczkowska; Wojciech Sas
- Book ID
- 104252220
- Publisher
- Elsevier Science
- Year
- 2002
- Tongue
- French
- Weight
- 165 KB
- Volume
- 43
- Category
- Article
- ISSN
- 0040-4039
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✦ Synopsis
Michael reaction of 2,2-pentamethylene-5-nitro-1,3-dioxane 1 with methyl 2-bromoacrylate, generated in situ from methyl 2,3-dibromopropanoate and triethylamine, afforded a-bromo-g-nitroester 3, which was readily converted into various 5,5-bis(hydroxymethyl)pyrrolidine analogues of nucleosides.
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