Dimethyldioxirane oxidation of the epoxides of (Z)-3-arylidene-1-thioflavanones
✍ Scribed by Albert LÉvai; TamÁs Patonay; GÁbor TÓth; JÓzsef KovÁcs; JÓzsef Jekö
- Publisher
- Journal of Heterocyclic Chemistry
- Year
- 2002
- Tongue
- English
- Weight
- 45 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0022-152X
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✦ Synopsis
Abstract
Sulfur atom of the trans, cis‐ and trans, trans‐epoxides 1 of (Z)‐3‐arylidene‐1‐thioflavanones have been oxidized with dimethyldioxirane to afford the appropriate sulfoxides 2 and sulfones 3 depending on the amount of oxidant used.
📜 SIMILAR VOLUMES
## Abstract For Abstract see ChemInform Abstract in Full Text.
## Abstract Regioselective epoxidation of 3‐aryl‐1‐(3‐coumarinyl)propen‐1‐ones **1–10** by isolated dimethyldioxirane afforded the appropriate epoxides **11–20** in high (76–87%) yields.
## Abstract 1,3‐Dipolar cycloaddition of __E__‐2‐arylidene‐1‐indanones 1a‐h and Z‐aurones 3a‐c with diazomethane provided __trans__‐spiro‐1‐pyrazolines 2a‐h and 4a‐c, respectively, as sole products. However, the same cycloaddition of Z‐1‐thioaurones 5a‐f afforded a mixture of Z‐α‐methyl‐1‐thioauron