Synthesis, Spectroscopic Studies and X-ray Crystal Structures of New Pyrazoline and Pyrazole Derivatives
作者:Gerimário F. de Sousa、Claudia C. Gatto、Inês S. Resck、Victor M. Deflon
DOI:10.1007/s10870-010-9896-2
日期:2011.3
The synthesis and characterization of some pyrazoline compounds of 1,3-diketones with hydrazine derivatives, namely, 1-(S-benzyldithiocarbazate)-3-methyl-5-phenyl-5-hydroxypyrazoline (1); 1-(2-thiophenecarboxylic)-3-methyl-5-phenyl-5-hydroxypyrazoline (2); 1-(2-thiophenecarboxylic)-3,5-dimethyl-5-hydroxypyrazoline (3); 1-(S-benzyldithiocarbazato)-3-methyl-5-phenylpyrazole (4); 1-(2-thiophenecarboxylic)-3-methyl-5-phenylpyrazole (5) and 1-(S-benzyldithiocarbazate)-3,5-dimethylpyrazole (6) are reported. Studies by IR, (1H, 13C)-NMR spectroscopies and single crystal X-ray diffraction revealed that compounds (1), (2) and (3) are formed as pyrazoline, whereas (4) and (5) are formed as pyrazole derivatives only under acidic conditions. Compound (1) crystallizes in orthorhombic P212121, a = 6.38960(10) Å, b = 12.9176(3) Å, c = 21.2552(5) Å, (2) crystallizes in monoclinic, P21/n, a = 11.3617(2) Å, b = 8.4988(2) Å, c = 92.8900(10) Å and β = 92.8900(5)°, (3) crystallizes in monoclinic, C2/c, a = 15.9500(5) Å, b = 9.3766(3) Å, c = 16.6910(5) Å and β = 113.825(2)°, (4) crystallizes in monoclinic, P21/c, a = 15.228(4) Å, b = 5.5714(13) Å, c = 19.956(5) Å and β = 91.575(7)° and (6) crystallizes in orthorhombic, P212121, a = 5.3920(2) Å, b = 11.2074(5) Å, c = 21.885(1) Å. The (3) derivative represents the first pyrazoline compound prepared from 2,4-pentanedione and characterized crystallographically. The synthesis and characterization of some pyrazoline compounds of 1,3-diketones with hydrazine derivatives, namely, 1-(S-benzyldithiocarbazate)-3-methyl-5-phenyl-5-hydroxypyrazoline (1); 1-(2-thiophenecarboxylic)-3-methyl-5-phenyl-5-hydroxypyrazoline (2); 1-(2-thiophenecarboxylic)-3,5-dimethyl-5-hydroxypyrazoline (3); 1-(S-benzyldithiocarbazato)-3-methyl-5-phenylpyrazole (4); 1-(2-thiophenecarboxylic)-3-methyl-5-phenylpyrazole (5) and 1-(S-benzyldithiocarbazate)-3,5-dimethylpyrazole (6) are reported. Studies by IR, (1H, 13C)-NMR spectroscopies and single crystal X-ray diffraction revealed that compounds (1), (2) and (3) are formed as pyrazoline, whereas (4) and (5) are formed as pyrazole derivatives only under acidic conditions. Compound (1) crystallizes in orthorhombic P212121, a = 6.38960(10) Å, b = 12.9176(3) Å, c = 21.2552(5) Å, (2) crystallizes in monoclinic, P21/n, a = 11.3617(2) Å, b = 8.4988(2) Å, c = 92.8900(10) Å and β = 92.8900(5)°, (3) crystallizes in monoclinic, C2/c, a = 15.9500(5) Å, b = 9.3766(3) Å, c = 16.6910(5) Å and β = 113.825(2)°, (4) crystallizes in monoclinic, P21/c, a = 15.228(4) Å, b = 5.5714(13) Å, c = 19.956(5) Å and β = 91.575(7)° and (6) crystallizes in orthorhombic, P212121, a = 5.3920(2) Å, b = 11.2074(5) Å, c = 21.885(1) Å. The (3) derivative represents the first pyrazoline compound prepared from 2,4-pentanedione and characterized crystallographically.
一些 1,3-二酮与肼衍生物的吡唑啉化合物的合成与表征,即 1-(S-苄基二硫代卡巴肼)-3-甲基-5-苯基-5-羟基吡唑啉 (1);1-(2-噻吩羧基)-3-甲基-5-苯基-5-羟基吡唑啉 (2);1-(2-thiophenecarboxylic)-3,5-dimethyl-5-hydroxypyrazoline (3); 1-(S-benzyldithiocarbazato)-3-methyl-5-phenylpyrazole (4); 1-(2-thiophenecarboxylic)-3-methyl-5-phenylpyrazole (5) and 1-(S-benzyldithiocarbazate)-3,5-dimethylpyrazole (6).通过红外光谱、(1H, 13C)-NMR光谱和单晶X射线衍射研究发现,化合物(1)、(2)和(3)是以吡唑啉的形式形成的,而(4)和(5)只有在酸性条件下才形成吡唑衍生物。化合物(1)以正交 P212121 结晶,a = 6.38960(10) 埃,b = 12.9176(3) Å, c = 21.2552(5) Å, (2) 结晶为单斜晶系,P21/n, a = 11.3617(2) Å, b = 8.4988(2) Å, c = 92.8900(10) Å and β = 92.8900(5)°, (3) 结晶为单斜晶系,C2/c, a = 15.9500(5) Å, b = 9.3766(3) Å, c = 16.6910(5) Å and β = 113.825(2)°, (4) 结晶为单斜晶系,P21/c, a = 15.228(4) Å, b = 5.5714(13) Å, c = 19.956(5) Å and β = 91.575(7)° and (6) crystallizes in orthorhombic, P212121, a = 5.3920(2) Å, b = 11.2074(5) Å, c = 21.885(1) Å.(3)衍生物是第一个由 2,4-戊二酮制备并具有晶体学特征的吡唑啉化合物。一些 1,3-二酮与肼衍生物的吡唑啉化合物的合成和表征,即 1-(S-苄基二硫代氨基甲酸酯)-3-甲基-5-苯基-5-羟基吡唑啉 (1);1-(2-噻吩羧基)-3-甲基-5-苯基-5-羟基吡唑啉 (2);1-(2-thiophenecarboxylic)-3,5-dimethyl-5-hydroxypyrazoline (3); 1-(S-benzyldithiocarbazato)-3-methyl-5-phenylpyrazole (4); 1-(2-thiophenecarboxylic)-3-methyl-5-phenylpyrazole (5) and 1-(S-benzyldithiocarbazate)-3,5-dimethylpyrazole (6).通过红外光谱、(1H, 13C)-NMR光谱和单晶X射线衍射研究发现,化合物(1)、(2)和(3)是以吡唑啉的形式形成的,而(4)和(5)只有在酸性条件下才形成吡唑衍生物。化合物(1)以正交 P212121 结晶,a = 6.38960(10) 埃,b = 12.9176(3) Å, c = 21.2552(5) Å, (2) 结晶为单斜晶系,P21/n, a = 11.3617(2) 埃,b = 8.4988(2) 埃,c = 92.8900(10) 埃和β = 92.8900(5)°,(3)结晶为单斜晶系,C2/c,a = 15.9500(5) 埃,b = 9.3766(3) Å, c = 16.6910(5) Å and β = 113.825(2)°, (4) 结晶为单斜晶系,P21/c, a = 15.228(4) Å, b = 5.5714(13) Å, c = 19.956(5) Å and β = 91.575(7)° and (6) crystallizes in orthorhombic, P212121, a = 5.3920(2) Å, b = 11.2074(5) Å, c = 21.885(1) Å.(3)衍生物是第一个由 2,4-戊二酮制备并具有晶体学特征的吡唑啉化合物。