- Oxymethylation of trifluoromethanesulfonamide with paraformaldehyde in ethyl acetate
-
Acid-catalyzed reaction of trifluoromethanesulfonamide with paraformaldehyde in ethyl acetate led to the formation of oxymethylated products that did not form in the reaction carried out in sulfuric acid. Following products were obtained: 5-trifluoromethylsulfonyl-1,3-dioxazinane, 3,7-bis-(trifluoromethylsulfonyl)-1,5,3,7-dioxadiazocane, and a complex of trifluoromethanesulfonamide with 2,4,8,10-tetraoxospiro[5,5]undecene, 1:1. The spiroring resulted from the cyclization of pentaerythritol under the action of formaldehyde. The pentaerythritol formed in its turn by oxymethylation of the methyl group of ethyl acetate with paraformaldehyde followed by the reduction of the COOEt group into CH2 OH by the formaldehyde.
- Meshcheryakov,Moskalik,Kelling,Schilde,Ushakov,Shainyan
-
-
Read Online
- A novel synthetic route to synthesize 2,4,8, 10-tetraoxaspiro[5.5]-undecane from formaldehyde under hydrothermal conditions
-
(Chemical Equation Presented) We report here the hydrothermal synthesis of 2,4,8,10-tetraoxaspiro[5.5]-undecane by using formaldehyde, the only precursor, in the presence of kaolin clay and boric acid. The reported method is the simplest one to synthesize the aforementioned product.
- Maheen, Gull,Tian, Ge,Song, Zhiguang,He, Chao,Shi, Zhan,Liu, Ziwei,Yuan, Hongming,Feng, Shouhua
-
-
Read Online
- TRANSACETALISATION DE TRIOLS A PARTIR DU DIMETHOXYMETHANE. SELECTIVITE ET APPLICATIONS SYNTHETIQUES
-
THe LiBr assisted/acid catalyzed transacetalation of triols from DMM affords a highly selective method for the synthesis of hydroxy compounds bearing a dioxane ring.These compounds might further conveniently be alkylated by phase transfer catalyzis.
- Gras, Jean-Louis,Nouguier, Robert,Mchich, Mohammed
-
p. 6601 - 6604
(2007/10/02)
-