𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Phosphorus pentoxide in organic synthesis-I: Phosphorus pentoxide-amine hydrochloride mixtures as reagents in a new synthesis of hypoxanthines

✍ Scribed by F.E. Nielsen; E.B. Pedersen

Publisher
Elsevier Science
Year
1982
Tongue
French
Weight
550 KB
Volume
38
Category
Article
ISSN
0040-4020

No coin nor oath required. For personal study only.

📜 SIMILAR VOLUMES

Phosphoramides, XV. Phosphorus pentoxide
Phosphoramides, XV. Phosphorus pentoxide amine mixtures as reagents in the synthesis of 2-(dialkylamino)quinolines
✍ Hansen, Bo W. ;Pedersen, Erik B. 📂 Article 📅 1981 🏛 John Wiley and Sons 🌐 English ⚖ 358 KB

## Abstract 2‐(Dialkylamino)quinolines were prepared by treating acetanilides and __N,N__‐dialkylformamides with a mixture of phosphorus pentoxide and a dialkylamine at 250°C. A mechanism which is related to HMPT induced ring closure reactions is proposed. Proper choice of amine and formamide is im

Phosphorus Pentoxide in Organic Synthesi
Phosphorus Pentoxide in Organic Synthesis, XVIII. Phosphorus Pentoxide and Secondary Amine Mixtures in a New Synthesis ofN6,N6-Dialkyl- andN6-Alkyl,N6-aryl-9H-purin-6-amines
✍ El-Bayouki, Khairy A. M. ;Nielsen, Flemming E. ;Pedersen, Erik B. 📂 Article 📅 1985 🏛 John Wiley and Sons 🌐 English ⚖ 263 KB

## Abstract A series of __N__^6^,__N__^6^‐disubstituted 9__H__‐purin‐6‐amines **2a**–**i** was prepared from 5‐acetamido‐6‐amino‐2‐methylpyrimidin‐4(3__H__)‐one (**1**) and a secondary amine or its hydrochloride in the presence of phosphorus pentoxide and triethylamine hydrochloride.

Phosphorus Pentoxide in Organic Synthesi
Phosphorus Pentoxide in Organic Synthesis, XII. Synthesis of 7H-Pyrrolo[2,3-d]pyrimidin-4-amines
✍ Jφrgensen, Anker ;Girgis, Nabih S. ;Pedersen, Erik B. 📂 Article 📅 1985 🏛 John Wiley and Sons 🌐 English ⚖ 378 KB

## Abstract A one‐step synthesis for the preparation of a new series of substituted 7__H__‐pyrrolo[2,3‐__d__]pyrimidin‐4‐amines **2** is described. The method consists in heating the corresponding pyrrolo [2,3‐__d__]pyrimidin‐4(3__H__)‐ones **1** in a mixture of phosphorus pentoxide, __N__,__N__‐di

Phosphorus Pentoxide in Organic Synthesi
Phosphorus Pentoxide in Organic Synthesis, XVI. A One-step Synthesis of 2-Methyl-N6-aryladenines from 5-Acetylamino-1H-imidazole-4-carboxamide Hydrochloride
✍ Andersen, Knud Erik ;Pedersen, Erik B. 📂 Article 📅 1985 🏛 John Wiley and Sons 🌐 English ⚖ 316 KB

## Abstract 5‐Amino‐1__H__‐imidazole‐4‐carboxamide hydrochloride has been converted into a series of 2‐methyl‐6‐(arylamino)purines **3** __via__ 5‐acetylamino‐1__H__‐imidazole‐4‐carboxamide hydrochloride (**1**) which was heated with phosphorus pentoxide, triethylamine hydrochloride, and an appropr