The addition of dialkyl acetylenedicarboxylates to strong CH-acids in the presence of triphenylphosphine leading to highly functionalized 1,4-diionic organophosphorus compounds is reported, These betaines possess two vicinal stereogenic centers and exist as a mixture of two diastercoisemers. Interco
โฆ LIBER โฆ
Organophosphorus compounds. X. A new synthesis of 1,2,3,4-tetrahydrophosphinolines
โ Scribed by Rowley, LE; Swan, JM
- Book ID
- 118068941
- Publisher
- Commonwealth Scientific and Industrial Research Organisation Publishing
- Year
- 1974
- Tongue
- English
- Weight
- 790 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0004-9425
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## Abstract 2,4โBisโ(4โmethoxyphenyl)โ1,3,2,4โdithiadiphosphetaneโ2,4โdisulfide (Lawesson's reagent) (**1**) reacted with 2โhydrazinoโ3โmethylโquinoxaline (**2**) to give [1,2,4,3]โtriazaphospholo[4,5โ__a__]quinoxaline derivative **3**. The Mannich reaction using different amines on compound **3**
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