𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Synthesis and reactivity of some thiochroman-3,4-diones.

✍ Scribed by Christopher D Gabbutt; John D Hepworth; B.Mark Heron

Book ID
104203202
Publisher
Elsevier Science
Year
1994
Tongue
French
Weight
938 KB
Volume
50
Category
Article
ISSN
0040-4020

No coin nor oath required. For personal study only.

✦ Synopsis

AbSrrac~ Tbiochmman -3.4-diones. which result from the rextion of thiociuoman-+ooes with isoamyl nitrite, form fused heterocycles on reaction with 1.2diiines and with p-anisaldehyde and ammonium acetate. Cyclopenta-[cl[llaenzothiopyran-2-one. formed on reacdon with dibenzyl ketone, yields a dibenzo[&fJthiopyran after cycloaddition of DMAD. Wii methyl magaesimn iodide, a mixture of thbchnwan-3-and 4-ols ia formed which was separated only after the selective dehydration of the 4-01. The resulting 4-methylene derivative was isolated as the hetero Diels-Alder s*linkedadducr C. D. GABBUTT et al.

📜 SIMILAR VOLUMES

Synthesis and reactivity of 6-methyl-4H-
Synthesis and reactivity of 6-methyl-4H-furo[3,2c]pyran-3,4-dione
✍ Djamila Hikem-Oukacha; Yahïa Rachedi; Maamar Hamdi; Artur M.S. Silva 📂 Article 📅 2010 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 141 KB 👁 1 views

## Abstract An efficient synthesis of 3‐bromoacetyl‐4‐hydroxy‐6‐methyl‐2__H__‐pyran‐2‐one by bromination of dehydroacetic acid in glacial acetic acid is described. Novel 4‐hydroxy‐6‐methyl‐3‐(2‐substituted‐thiazol‐4‐yl)‐2__H__‐pyran‐2‐ones have been prepared from the reaction of 3‐bromoacetyl‐4‐hyd