Crystal engineering of the composition of pharmaceutical phases:: Multiple-component crystalline solids involving carbamazepine

被引:470
作者
Fleischman, SG
Kuduva, SS
McMahon, JA
Moulton, B
Walsh, RDB
Rodríguez-Hornedo, N
Zaworotko, MJ [1 ]
机构
[1] Univ S Florida, Dept Chem, Tampa, FL 33620 USA
[2] Univ Michigan, Coll Pharm, Dept Pharmaceut Sci, Ann Arbor, MI 48109 USA
关键词
D O I
10.1021/cg034035x
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The crystal engineering design strategy facilitates supramolecular synthesis of 13 new crystalline phases of carbamazepine (CBZ), an analgesic and anticonvulsant with known problems related to solubility and polymorphism. CBZ forms supramolecular complexes with the following molecules, all of which are complementary to CBZ in terms of hydrogen bonding and can therefore act as cocrystal formers: acetone (1a); DMSO (1b); benzoquinone (1c); terephthalaldehyde (1d); saccharin (1e); nicotinamide (If); acetic acid (1g); formic acid (1h); butyric acid (1i); trimesic acid (1j); 5-nitroisophthalic acid (1k); adamantane-1,3,5,7-tetracarboxylic acid (11); and formamide (1m). Two distinct strategies based upon selection of complementary hydrogen-bond functionalities and previously known supramolecular synthons were utilized: strategy I exploits the exofunctional nature of the carboxamide dimer as either a hydrogen-bond donor or a hydrogen-bond acceptor and thereby retains the carboxamide dimer that is present in all previously isolated forms of CBZ; strategy II perturbs the carboxamide homosynthon by forming a heterosynthon between the carboxamide moiety of CBZ and the carboxylic acid moieties. The latter approach profoundly modifies crystal packing and should therefore affect the physical and pharmaceutical properties of CBZ. A full analysis of crystal packing and a discussion of what these results might mean in the broader context of crystal engineering and pharmaceutical solids is presented.
引用
收藏
页码:909 / 919
页数:11
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