Structures of (plus or minus)-trans-4-(2,3-dimethoxyphenyl)- (I) and (+)-trans-4-(4-methylphenyl)-2-hydroxy-2-methyl-3,4-dihydro-2H,5H-pyrano3,2-c1benzopyran-5-one (II)

Structures of (plus or minus)-trans-4-(2,3-dimethoxyphenyl)- (I) and... <h2>Acta Crystallographica Section C</h2><h3>Crystal Structure Communications</h3><h3>0108-2701</h3> <h2>research papers (organic compounds)</h2> Volume 45 Part 11 Pages 1740-1743 November 1989 <h2>Structures of (±)- trans -4-(2,3-dimethoxyphenyl)- (I) and (+)- trans -4-(4-methylphenyl)-2-hydroxy-2-methyl-3,4-dihydro-2 H ,5 H -pyrano[3,2- c ][1]benzopyran-5-one (II)</h2> G. Ruggiero, O. Platt Jnr, E. J. Valente and D. S. Eggleston Acta Cryst. (1989). C45, 1740-1743 Structures of (_)-trans-4-(2,3-Dimethoxyphenyl)- (I)and ( + )-trans-4-(4-Methylphenyl)-2-hydroxy-2-methyl-3,4-dihydro-2H,5H-pyrano[3,2-c]- [llbenzopyran-5-one (II) BY GERARD RUGGmRO, OLIVER PLATT JR AND EDWARD J. VALENTE Department of Chemistry, Mississippi College, Clinton, MS 39058, USA AND DRAKE S. EGGLESTON Department of Physical & Structural Chemistry, Smith, Kline & French Laboratories, King of Prussia, PA 19406, USA (Received 21 July 1988; accepted 21 March 1989) Abstract. Derivatives of 2-methyl-3,4-dihydro-2H,5H- pyrano[3,2-c][1]benzopyran-5-one. (I) Racemic trans-2-hydroxy-4-(2,3-dimethoxyphenyl), C21H2006, Mr= 368-40, monoclinic, C2/c, a = 19.403 (7), b = 10-636 (8), c = 21.456 (13)/~, r= 123.94 (5)°, V= 3673"8 (85) A3, Z = 8; Dx = 1"33 g cm-3, A(Mo Ka) = 0"71078/~, /z = 0"913 cm-1, F(000) = 1552, T= 295 K, final R = 0.056 for 2463 observations [I>_ 20(/)]. Molecules are hydrogen bonded between hydroxyls and coumarin carbonyls, O...O 2.812 (3)A. The dihydropyran ring is in the d,e- diplanar conformation. (II) Resolved (2R,4R)-(+)- trans-2-hydroxy-4-(4-methylphenyl), C20H1804, http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Acta Crystallographica Section C: Crystal Structure Communications International Union of Crystallography

Structures of (plus or minus)-trans-4-(2,3-dimethoxyphenyl)- (I) and (+)-trans-4-(4-methylphenyl)-2-hydroxy-2-methyl-3,4-dihydro-2H,5H-pyrano3,2-c1benzopyran-5-one (II)

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Structures of (plus or minus)-trans-4-(2,3-dimethoxyphenyl)- (I) and (+)-trans-4-(4-methylphenyl)-2-hydroxy-2-methyl-3,4-dihydro-2H,5H-pyrano3,2-c1benzopyran-5-one (II)


Abstract

<h2>Acta Crystallographica Section C</h2><h3>Crystal Structure Communications</h3><h3>0108-2701</h3> <h2>research papers (organic compounds)</h2> Volume 45 Part 11 Pages 1740-1743 November 1989 <h2>Structures of (±)- trans -4-(2,3-dimethoxyphenyl)- (I) and (+)- trans -4-(4-methylphenyl)-2-hydroxy-2-methyl-3,4-dihydro-2 H ,5 H -pyrano[3,2- c ][1]benzopyran-5-one (II)</h2> G. Ruggiero, O. Platt Jnr, E. J. Valente and D. S. Eggleston Acta Cryst. (1989). C45, 1740-1743 Structures of (_)-trans-4-(2,3-Dimethoxyphenyl)- (I)and ( + )-trans-4-(4-Methylphenyl)-2-hydroxy-2-methyl-3,4-dihydro-2H,5H-pyrano[3,2-c]- [llbenzopyran-5-one (II) BY GERARD RUGGmRO, OLIVER PLATT JR AND EDWARD J. VALENTE Department of Chemistry, Mississippi College, Clinton, MS 39058, USA AND DRAKE S. EGGLESTON Department of Physical & Structural Chemistry, Smith, Kline & French Laboratories, King of Prussia, PA 19406, USA (Received 21 July 1988; accepted 21 March 1989) Abstract. Derivatives of 2-methyl-3,4-dihydro-2H,5H- pyrano[3,2-c][1]benzopyran-5-one. (I) Racemic trans-2-hydroxy-4-(2,3-dimethoxyphenyl), C21H2006, Mr= 368-40, monoclinic, C2/c, a = 19.403 (7), b = 10-636 (8), c = 21.456 (13)/~, r= 123.94 (5)°, V= 3673"8 (85) A3, Z = 8; Dx = 1"33 g cm-3, A(Mo Ka) = 0"71078/~, /z = 0"913 cm-1, F(000) = 1552, T= 295 K, final R = 0.056 for 2463 observations [I>_ 20(/)]. Molecules are hydrogen bonded between hydroxyls and coumarin carbonyls, O...O 2.812 (3)A. The dihydropyran ring is in the d,e- diplanar conformation. (II) Resolved (2R,4R)-(+)- trans-2-hydroxy-4-(4-methylphenyl), C20H1804,
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Abstract

<h2>Acta Crystallographica Section C</h2><h3>Crystal Structure Communications</h3><h3>0108-2701</h3> <h2>research papers (organic compounds)</h2> Volume 45 Part 11 Pages 1740-1743 November 1989 <h2>Structures of (±)- trans -4-(2,3-dimethoxyphenyl)- (I) and (+)- trans -4-(4-methylphenyl)-2-hydroxy-2-methyl-3,4-dihydro-2 H ,5 H -pyrano[3,2- c ][1]benzopyran-5-one (II)</h2> G. Ruggiero, O. Platt Jnr, E. J. Valente and D. S. Eggleston Acta Cryst. (1989). C45, 1740-1743 Structures of (_)-trans-4-(2,3-Dimethoxyphenyl)- (I)and ( + )-trans-4-(4-Methylphenyl)-2-hydroxy-2-methyl-3,4-dihydro-2H,5H-pyrano[3,2-c]- [llbenzopyran-5-one (II) BY GERARD RUGGmRO, OLIVER PLATT JR AND EDWARD J. VALENTE Department of Chemistry, Mississippi College, Clinton, MS 39058, USA AND DRAKE S. EGGLESTON Department of Physical & Structural Chemistry, Smith, Kline & French Laboratories, King of Prussia, PA 19406, USA (Received 21 July 1988; accepted 21 March 1989) Abstract. Derivatives of 2-methyl-3,4-dihydro-2H,5H- pyrano[3,2-c][1]benzopyran-5-one. (I) Racemic trans-2-hydroxy-4-(2,3-dimethoxyphenyl), C21H2006, Mr= 368-40, monoclinic, C2/c, a = 19.403 (7), b = 10-636 (8), c = 21.456 (13)/~, r= 123.94 (5)°, V= 3673"8 (85) A3, Z = 8; Dx = 1"33 g cm-3, A(Mo Ka) = 0"71078/~, /z = 0"913 cm-1, F(000) = 1552, T= 295 K, final R = 0.056 for 2463 observations [I>_ 20(/)]. Molecules are hydrogen bonded between hydroxyls and coumarin carbonyls, O...O 2.812 (3)A. The dihydropyran ring is in the d,e- diplanar conformation. (II) Resolved (2R,4R)-(+)- trans-2-hydroxy-4-(4-methylphenyl), C20H1804,

Journal

Acta Crystallographica Section C: Crystal Structure CommunicationsInternational Union of Crystallography

Published: Nov 15, 1989

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