Treatment of 5-(4-chloro-5H-1,2,3-dithiazol-5-ylidene)-2,2-dimethyl-1,3-dioxane-4,6-dione with primary arylamines in CH 2 Cl 2 at rt gave 5-[(arylamino)(cyano)methylene]-2,2-dimethyl-1,3-dioxane-4,6-diones in excellent yields. The latter compounds were utilized for the preparation of 2-cyano-4-quino
✦ LIBER ✦
A Facile Epoxidation of 5-Methylene-1,3-dioxane-4,6-diones with Hydrogen Peroxide without Catalyst
✍ Scribed by Sugiyama, Kunio; Tsuno, Takashi; Ago, Hideo
- Book ID
- 126486175
- Publisher
- Japan Institute of Heterocyclic Chemistry
- Year
- 1994
- Tongue
- English
- Weight
- 834 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0385-5414
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## Abstract Triphenylphosphine (TPP) has been utilized as a novel and efficient catalyst for the Knoevenagel condensation of indole‐3‐carboxaldehydes **1(a–e)**, 1‐methyl‐1H‐indole‐3‐carboxaldehydes **4(a–e)**, and 1‐ethyl‐1H‐indole‐3‐carboxaldehydes **6(a–e)** with the active methylene compound, t