Reaction of 2-bromomethyl-I-(2'-tetrahydropyranyloxy) benzene 3a with tetrachlorocatechol(TCC) in acetone in presence of anhydrous K&O3 resulted in the formation of diastereomeric products to benzofuranl which cis & tram+ 6-chlor~~hydroxy-&(2-oxopropyl)spiro[9&benzo[a]xanthen-9,2'(I'H) -7(8H)-one ea
One pot synthesis of polycyclic oxygen aromatics. Part III mechanism of formation
✍ Scribed by T.R. Kasturi; A.B. Mandal; P.Amruta Reddy; K.B.Ganesha Prasad; B. Rajasekhar
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- French
- Weight
- 947 KB
- Volume
- 47
- Category
- Article
- ISSN
- 0040-4020
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## Abstract Reaction of 3‐amino‐3‐methylthio‐2‐cyanoacrylonitrile (1) with excess dimethyl acetylenedi‐carboxylate(DMAD) in the presence of potassium carbonate in dimethyl sulfoxide gave a novel tricyclic heterocycle, hexamethyl l__H__‐1,4,7‐triazaphenalene‐2,3,5,6,8,9‐hexacarboxylate (**5a**). Whe