The reaction of diazoacetic ester with thiobenzophenone
โ Scribed by Ivars Kalwinsch; Rolf Huisgen
- Publisher
- Elsevier Science
- Year
- 1981
- Tongue
- French
- Weight
- 236 KB
- Volume
- 22
- Category
- Article
- ISSN
- 0040-4039
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โฆ Synopsis
Printed 1c Gre-.t Britain 01991 PereJan.02 Press Lt+. THE REACTION OF DIAZOACETIC ESTER WITH THIOBENZOPHENONE
๐ SIMILAR VOLUMES
The catalyzed decanpos ition of ethyl diazoacetati in the Presence of B-keto esters produces regioisaneric enol ethers and the diester fran formal carbenoid insertion into the a-C-H bond. The product distribution is very catalyst dependent.
2,5-Dihydro-2,2-diphenyl-1,3,4-thiadiazole (4) eliminates N 2 at -45 ยฐC and generates thiobenzophenone S-methylide (5), which is intercepted by dipolarophiles. The 1,3-cycloadditions of 5 with thiones (aromatic and aliphatic thioketones, dithioesters, trithiocarbonate) furnish 1,3-dithiolanes 7, in
## Synthesis of a Stable 1,3,4-Dioxazolidine[**] By Jurgen Varwig and Rudiger Mews"] Whereas 1,3,2-['] and 1,2,4-dio~azolidines~~~, compounds ( 1 ) and ( ) respectively, are well documented, to our knowledge only the thermally unstable 1:i:l adduct of tert-butyl isocyanide, 2-methyl-2-nitrosopropa