𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Allylation-Assisted Addition of Nitromethane to 2H-1-Benzopyran-2-ones Substituted in Position 3

✍ Scribed by Bojilova, Anka ;Kostadinova, Todorka ;Ivanov, Christo


Publisher
John Wiley and Sons
Year
1989
Tongue
English
Weight
243 KB
Volume
1989
Category
Article
ISSN
0947-3440

No coin nor oath required. For personal study only.


📜 SIMILAR VOLUMES


Reactions of 3-acyl-substituted 2H-1-ben
✍ Bojilova, Anka ;Rodios, Nestor ;Nicolova, Rositsa ;Ivanov, Christo 📂 Article 📅 1991 🏛 John Wiley and Sons 🌐 English ⚖ 587 KB

## Abstract 3‐Pivaloyl‐2__H__‐1‐benzopyran‐2‐one (6) reacts with acid anhydrides in the presence of triethylamine to give 4‐(2‐oxoalkyl)‐2‐oxochromans 7 and 3‐pivaloyl‐2‐oxochroman (8) in moderate yields. Also 3‐propionyl‐ and 3‐isobutyryl‐2__H__‐1‐benzopyran‐2‐ones (9) react with acid anhydrides u

Preparation of 4-hydroxy-3-substituted,
✍ Sharon E. Davis; A. Cameron Church; Rebecca C. Tummons; Charles F. Beam 📂 Article 📅 1997 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 305 KB

## Abstract C(α)‐Carboxylic acid esters were treated with excess lithium diisopropylamide, condensed with methyl salicylates or methyl thiosalicylate, followed by acid cyclization to either 4‐hydroxy‐3‐substituted, 2__H__‐1‐benzopyran‐2‐ones (coumarins), or 2__H__‐1‐benzothiopyran‐2‐ones (thiocouma