- A Novel Synthesis of 1H-Pyrrole-2,3,4,5-tetracarboxylates
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A novel and convenient synthesis of 1H-pyrrole-2,3,4,5-tetracarboxylates is described.Photocyclization of 1,1'-bis(methoxycarbonyl)divinylamine with acetylenedicarboxylates gave 7-azabicyclohept-2-ene-1,2,3,4-tetracarboxylates 2a-i, which on melting split ethylene off to yield 1H-pyrrole-2,3,4,5-tetracarboxylates 3a-i quantitatively.
- Zaima, Tadataka,Matsunaga, Yoshiharu,Mitsuhashi, Keiryo
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