Titanium(IV) Enolates of 2-Nitrocarboxylic Esters and Their Oxidative Chlorination. A Convenient Route to α-Chloro-α-nitrocarboxylates
In: Synlett (Stuttgart), 2012, Heft 2, S. 267-271
academicJournal
- print, 25 ref
Zugriff:
A new method for the synthesis of 2-chloro-2-nitrocarboxylic esters from 2-nitrocarboxylates is described. The procedure consists of the oxidative chlorination of titanium(IV) enolates of 2-nitro esters in the presence of ammonium nitrate. Esters of 2-chloro2-nitrocarboxylic acids are formed in very good to quantitative yields. Application of this method for the chlorination of α,α'-dinitrodicarboxylates leads to α,α'-dichloro-α,α'-dinitrocarboxylic esters with high meso-diastereoselectivity. The absence of ammonium nitrate from the reaction mixture affects the reduction of nitro groups and leads to partial transformation of 2-nitrocarboxylic esters into 2-(hydroxyimino)carboxylates.
Titel: |
Titanium(IV) Enolates of 2-Nitrocarboxylic Esters and Their Oxidative Chlorination. A Convenient Route to α-Chloro-α-nitrocarboxylates
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Autor/in / Beteiligte Person: | CIEZ, Dariusz ; KALINOWSKA-TLUSCIK, Justyna |
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Zeitschrift: | Synlett (Stuttgart), 2012, Heft 2, S. 267-271 |
Veröffentlichung: | Stuttgart: Thieme, 2012 |
Medientyp: | academicJournal |
Umfang: | print, 25 ref |
ISSN: | 0936-5214 (print) |
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