BMC Chemistry

Table 2 Synthesis of spiro-indoline-pyranochromene derivatives^a

From: A novel heterogeneous acid–base nano-catalyst designed based on graphene oxide for synthesis of spiro-indoline-pyranochromene derivatives

Entry	Products	Chemical formula	M.P. (°C)	Yields (%)
4a		C₂₀H₁₁N₃O₄	290–293 (27)	95
4b		C₂₅H₂₂N₂O₆	208–212(19)	88
4c		C₂₆H₂₂N₂O₆	224–227(19)	88
4d		C₂₆H₂₂N₂O₆	257–258(19)	92
4e		C₂₈H₂₀N₂O₆	280–281(19)	93
4f		C₂₆H₂₄N₂O₆	218–220 (19)	87
4 g		C₂₇H₂₄N₂O₆	228–230 (19)	87
4 h		C₂₉H₂₂N₂O₆	233–235 (19)	90

^aReaction conditions: 1.0 mmol of isatin ring, nitrile moiety, 4-hydroxy coumarin and 0.04 g catalyst under solvent-free at r.t

Back to article page

ISSN: 2661-801X

Contact us

Submission enquiries: bmcchemistry@biomedcentral.com
General enquiries: ORSupport@springernature.com