Acta Crystallographica Section C

Crystal Structure Communications

Volume 57, Part 7 (July 2001)

organic compounds

 

A series of three (E)-2-alkylidene-1,4-di-p-tosyl-1,2,3,4-tetrahydroquinoxaline compounds

S. Banerjee, A. K. Mukherjee, R. Mukhopadhyay, N. G. Kundu and A. J. Welch

Abstract: The three title quinoxaline derivatives, (E)-2-(4-methylbenzylidene)-1,4-di-p-tosyl-1,2,3,4-tetrahydroquinoxaline, C₃₀H₂₈N₂O₄S₂, (II), (E)-2-(4-methoxybenzylidene)-1,4-di-p-tosyl-1,2,3,4-tetrahydroquinoxaline, C₃₀H₂₈N₂O₅S₂, (III), and (E)-2-(3-chlorobenzylidene)-1,4-di-p-tosyl-1,2,3,4-tetrahydroquinoxaline, C₂₉H₂₅ClN₂O₄S₂, (IV), were synthesized by palladium-catalyzed hetero-annulation. The E configuration of the exocyclic double bond in the three compounds has been established by the present X-ray study. The saturated part of the quinoxaline moiety in all three compounds assumes a distorted chair conformation. The numerical descriptors indicate a high degree of isostructurality between compounds (II) and (III), but no isostructurality with compound (IV).

Formula: C₃₀H₂₈N₂O₄S₂, C₃₀H₂₈N₂O₅S₂ and C₂₉H₂₅ClN₂O₄S₂

	Structure factor file (CIF format) (241.1 kbytes) Contains datablock II
	Structure factor file (CIF format) (229.9 kbytes) Contains datablock III
	Structure factor file (CIF format) (220.9 kbytes) Contains datablock IV

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