Acta Crystallographica Section C

Crystal Structure Communications

Volume 57, Part 7 (July 2001)


organic compounds



sk1466 scheme

Acta Cryst. (2001). C57, 861-864    [ doi:10.1107/S0108270101006588 ]

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


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Structure factor file (CIF format) (241.1 kbytes)
Contains datablock II


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Structure factor file (CIF format) (229.9 kbytes)
Contains datablock III


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Structure factor file (CIF format) (220.9 kbytes)
Contains datablock IV


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