Ceric ammonium nitrate was found to be an efficient reagent for the preparation of 1,5-benzodiazepine derivatives of a wide range of substituted o-phenylenediamines and electronically divergent ketones in moderate to excellent isolated yields (60-98%) under mild conditions using methanol as solvent at ambient temperature.
NBS as an efficient catalyst for the synthesis of 1,5-benzodiazepine derivatives under mild conditions
作者:Chun-Wei Kuo、Shivaji V. More、Ching-Fa Yao
DOI:10.1016/j.tetlet.2006.09.128
日期:2006.11
Various biologically important 1,5-benzodiazepinederivatives were efficiently synthesized in excellent yields using catalytic amounts of NBS (10 mol %). This inexpensive, nontoxic, and readily available catalyst efficiently catalyzes the condensation of several aromatic as well as aliphatic ketones with substituted o-phenylenediamines.
Efficient TCT-catalyzed Synthesis of 1,5-Benzodiazepine Derivatives under Mild Conditions
作者:Chun-Wei Kuo、Chun-Chao Wang、Veerababurao Kavala、Ching-Fa Yao
DOI:10.3390/molecules13092313
日期:——
2,4,6-Trichloro-1,3,5-triazine (TCT) efficiently catalyzed the condensation reactions between 1,2-diamines and various enolizable ketones to afford 1,5-benzodiazepines in good to excellent yields. Simple and mild reaction conditions, the use of a cheap catalyst and easy workup and isolation are notable features of this method.
Catalyst-free synthesis of novel 1,5-benzodiazepines and 3,4-dihydroquinoxalines using isocyanide-based one-pot, three- and four-component reactions
作者:Reagan L. Mohlala、E. Mabel Coyanis、Manuel A. Fernandes、Moira L. Bode
DOI:10.1039/d1ra04444c
日期:——
Reaction of benzimidazolone derivatives, or their thio- or aza-counterparts, with an isocyanide in the presence of acetone unexpectedly gave rise to novel tricyclic benzodiazepine derivatives in good yield by means of a four-component reaction incorporating two moles of acetone. Benzimidazole starting substrates bearing an electron-withdrawing group gave rise instead to dihydroquinoxaline derivatives
Metal complexes of benzodiazepines. Part 1. Synthesis, crystal structure, and characterization in solid and solution of trans-dichloro(7,8-dichloro-2,3-dihydro-2,2,4-trimethyl-1H-1,5-benzodiazepine)(tri-n-propylphosphine)-palladium(II)
The complex, [PdCl2L(PPrn3)], which to our knowledge is the first example of a metalcomplex of 1,5-benzodiazepines, is easily obtained by cleavage of the bridged complex [Pd2Cl4(PPrn3)2] with 7,8-dichloro-2,3-dihydro-2,2,4-trimethyl-1H-1,5-benzodiazepine (L) in CH2Cl2. Proton and 13C n.m.r. spectra in CDCl3 of the complex suggest that the ligand is co-ordinated through N(5). Single-crystal analysis
据我们所知,复合物[PdCl 2 L(PPr n 3)]是1,5-苯并二氮杂卓金属配合物的第一个实例,可以通过裂解桥接的复合物[Pd 2 Cl 4(PPr n 3)2 ]用在CH 2 Cl 2中的7,8-dichloro-2,3-dihydro-2,2,4-trimethyl-1 H -1,5-benzodiazepine(L)。CDCl 3中的质子和13 C nmr光谱的复杂表明配体是通过N(5)配位的。单晶分析证实,苯二氮卓确实通过该氮原子与周围钯几何协调是正方形的平面与两个氯化物反式到彼此。配位会影响键距和键角,而不会改变配体的舟状构象。