๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

Synthesis and structure of [1,2]thiaphospholo[4,5-e][1,2,4]triazines

โœ Scribed by Yehia A Ibrahim; Azza M Kadry; Maher R Ibrahim; J.N Lisgarten; B.S Potter; R.A Palmer


Publisher
Elsevier Science
Year
1999
Tongue
French
Weight
278 KB
Volume
55
Category
Article
ISSN
0040-4020

No coin nor oath required. For personal study only.

โœฆ Synopsis


The first syntheses of the novel [1,2]thiaphospholo[4,5-e][1)2,4]triazine ring system, exemplified by the derivatives 3a-c have been accomplished by the action of Lawesson's reagent on the 5-arylmethyl-l,2,4-triazin-6-ones la-ยข, their thiones 2a-c or the Mannich bases 4-6. The structure of these new thiaphospholotriazines was established mainly by NMR, and X-ray structural analysis.


๐Ÿ“œ SIMILAR VOLUMES


1,2,4-triazino[6,5-e]-1,2,4-triazine
โœ Hans Neunhoeffer; Heinz Hammann ๐Ÿ“‚ Article ๐Ÿ“… 1983 ๐Ÿ› Elsevier Science ๐ŸŒ French โš– 186 KB
Synthesis of 1,2,4-triazines - XIV. Regi
โœ Tadashi Ohsumi; Hans Neunhoeffer ๐Ÿ“‚ Article ๐Ÿ“… 1992 ๐Ÿ› Elsevier Science ๐ŸŒ French โš– 542 KB

Ethyl 1,2,4-triazine-5-carboxylates 6 were prepared by heating N,N-dimethylaminomethyleneor ethoxymethylenehydrazones 5 with ammonium acetate in acetic acid at-100ยฐC. NMR-studies confirmed the absence of their regio isomers (6-carboxylates), showing the high regioselectivity of this procedure. Rece