Abstract
Dilithiated C(α), N-carbomethoxyhydrazones were condensed with lithiated methyl 2-(aminosulfonyl)benzoate to afford intermediates that were isolated and not characterized but cyclized with acetic anhydride, which also resulted in N-acetylation. The X-ray crystal structure determinations of methyl 2-acetyl-5′-phenyl-2H-spiro[benzo[d]isothiazole-3,3′-pyrazole]-1,1-dioxide-2′(4′H)-carboxylate and methyl 2-acetyl-5′-(2-thienyl)-2H-spiro[benzo[d]isothiazole-3,3′-pyrazole]-1,1-dioxide-2′(4′H)-carboxylate products were a follow up for absorption spectra, and they confirmed their structures. Mechanistic intermediates to describe the reaction may include C-acylated intermediates that cyclize to spiro(N-benzoisothiazole dioxide-pyrazole) instead of N-carbomethoxypyrazole-ortho-benzenesulfonamides. Crystals of C19H17N3O5S 7 are monoclinic, P21/c, a = 11.899(2) Å, b = 17.562(4) Å, c = 9.484(2) Å, β = 111.03(3)°, Z = 4, V = 1849.9(6) Å3, R 1 = 0.0857 and wR 2 = 0.2216 for reflections with I > 2σ(I); crystals of C17H15N3O5S2 8 are orthorhombic, Pbca, a = 16.045(3) Å, b = 10.746(2) Å, c = 20.389(4) Å, Z = 8, V = 3516(1) Å3, R 1 = 0.0841 and wR 2 = 0.2179 for all reflections with I > 2σ(I).
Graphical Abstract
X-ray crystal analysis was important for determining the conformation of the structure of N-acetyl-N′-carbomethoxy-spiro(benzoisothiazole–pyrazole)dioxides prepared by the condensation and twofold cyclization of dilithiated C(α), N-carbomethoxyhydrazones and methyl 2-(aminosulfonyl)benzoate.
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Notes
CCDC for compound 7 (689212) and for compound 8 (689211) contain the supplementary crystallographic data for this paper. These data can be obtained free of charge from the Cambridge Crystallographic Data Centre via www.ccdc.cam.ac.uk/data_request/cif.
References
Martins MAP, Cunico W, Pereira CMP, Sinhorin AP, Flores AFC, Bonacorso HG, Zanatta N (2004) Current Org Synth 1:391
Muniz-Miranda M, Cardini G, Schettino V (2004) Theor Chem Acc 111:264
Lipton AS, Wright TA, Bowman MK, Reger DL, Ellis PD (2002) J Am Chem Soc 124:5850
Boyer G, Galy JP, Faure R, Barbe J (1994) Magn Res Chem 32:537
Okafor EC, Uzoukwu BA (1991) Syn React Inorg Metal Org Chem 21:825
Sanz D, Claramunt RM, Alkorta I, Elguero J (2007) Struct Chem 18:703
Shi F-Q, Song B-A (2008) Int J Quantum Chem 108:1107
Wang H, Wang X, Wang H, Wang L, Liu A (2007) J Mol Model 13:147
Menegatti R, Silva GMS, Zapata-Sudo G, Raimundo JM, Sudo RT, Barreiro EJ, Fraga CAM (2006) Bioorgan Med Chem 14:632
Elguero J, Goya P, Jagerovic N, Silva AMS (2002) Targets Heterocycl Syst 6:52
Akbas E, Berber I (2006) Eur J Med Chem 41:904
Bajpai VK, Lee TJ, Kang SC (2009) J Sci Food Agriculture 89:109
Stanovnik B, Svete J (2002) Sci Synth 12:15
Elguero J (1996) Comp Heterocycl Chem II 3:1, 817
Shcherbakova I, Elguero J, Katritzky AR (2000) Adv Heterocycl Chem 77:51
Redkin RG, Shemchuk LA, Chernykh VP, Shishkin OV, Shishkina SV (2007) Tetrahedron 63:11444
Khodairy A, El-Sayed AM, Salah H, Abdel-Ghany H (2007) Synth Commun 37:3245
Holzer W, Claramunt RM, Perez-Torralba M, Guggi D, Brehmer TH (2003) J Org Chem 68:7943
Raghunathan R, Shanmugasundaram M, Bhanumathi S, Malar EJP (1998) Heteroatom Chem 9:327
Mishriky N, Girgis AS, Hosni HM, Farag H (2006) J Heterocycl Chem 43:1549
Dawood KM (2005) Tetrahedron 61:5229
Sammelson RE, Gurusinghe CD, Kurth JM, Olmstead MM, Kurth MJ (2002) J Org Chem 67:876
Khalil S, Hossain MB, van der Helm D, Alam M, Sanduja R (1996) Acta Crystallographica C 52:1272
Grant BJ, Kramp CR, Knight JD, Meierhoefer MA, Vella JH, Sober CL, Jones SS, Metz CR, Beam CF, Pennington WT, VanDerveer DG, Camper ND (2007) J Heterocycl Chem 44:627
Wrobel J, Dietrich A (1994) Heterocycles 38:1823
Grant SP, Embree MC, Downs JR, Townsend JD, Beam CF (2003) Ind Eng Chem Res 42:5721
Meierhoefer MA, Dunn SP, Hajiaghamohseni LM, Walters MJ, Embree MC, Grant SP, Downs JR, Townsend JD, Metz CR, Beam CF, Pennington WT, VanDerveer DG, Camper ND (2005) J Heterocycl Chem 42:1095
Dunn SP, Walters MJ, Metz CR, Beam CF, Pennington WT, Krawiec M (2004) J Heterocycl Chem 41:1005
Knight JD, Brown JB, Overby JS, Beam CF, Camper ND (2008) J Heterocycl Chem 45:189
Mirone P, Vampiri M (1952) Atti Accad Nazl Lincei Rend Classe Sci Fis Mat e Nat 583 (Chem Abstr 46:9423)
Johnson AL, Sweetser PB (1976) J Org Chem 41:110
Rigaku Corporation (1999) Crystal clear. Rigaku Corporation, Danvers.
Jacobson RA (1998) Absorption correction used REQABS v 1.1. Molecular Structure Corp, College Station
Sheldrick, GM (1997) SHELX-97, Crystallographic Computing System–Windows Version; University of Gottingen, Germany
Cromer DT, Waber JT (1974) International tables for X-ray crystallography, Vol IV, Tables 2.2 B and 2.3.1. Kluwer Academic Publisher, Dordrecht
Farrugia LJ (1997) ORTEP-3 for windows. J Appl Cryst 30:565
Acknowledgements
We wish to thank the following sponsors: the Research Corporation, the National Science Foundation Grants CHE # 9708014 and # 0212699 for Research at Undergraduate Institutions, the United States Department of Agriculture, NRICGP # 2003-35504-12853, and the Petroleum Research Fund, Administered by the American Chemical Society. The College of Charleston awarded summer grants through its Summer Undergraduate Research Forum (SURF-2006 and 2007) to J. D. Knight and (SURF-2007) A. C. Dawsey.
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Metz, C.R., Knight, J.D., Dawsey, A.C. et al. Synthesis and Crystal Structure Determination of Methyl 2-acetyl-5′-phenyl-2H-spiro[benzo[d]isothiazole-3,3′-pyrazole]-1,1-dioxide-2′(4′H)-carboxylate and Methyl 2-acetyl-5′-(2-thienyl)-2H-spiro[benzo[d]isothiazole-3,3′-pyrazole]-1,1-dioxide-2′(4′H)-carboxylate. J Chem Crystallogr 40, 296–301 (2010). https://doi.org/10.1007/s10870-009-9649-2
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DOI: https://doi.org/10.1007/s10870-009-9649-2