Acid catalysed backbone rearrangement of cholesta-2,4,6-triene: On the origin of ring A and ring B aromatic steroids in recent sediments

Aromatization and ring cyclization: A be

Aromatization and ring cyclization: A better understanding on the ring cyclization mechanism of 3-amino-6-hydrazino-1,2,4-triazin-5(2H)-one reacted with acetic acid in N,N-dimethylformamide

✍ Long-Chih Hwang; Rang-Rong Wu; Chun-Hsien Tu 📂 Article 📅 2005 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 121 KB 👁 1 views

## Abstract In this paper we report that the title compound (3) reacts with excess __N,N__‐dimethylformamide (DMF) containing two equivalents of acetic acid to afford 6‐amino‐1,2,4‐triazolo[3,4‐__f__][1,2,4]triazin‐8(7__H__)‐one (**1**). When 3‐amino‐2‐benzyl‐6‐hydrazino‐1,2,4‐triazin‐5(2__H__)‐one