2-Amidinylindole-3-carbaldehydes: Versatile Synthons for the Preparation of α-Carboline Derivatives
摘要:
The 2-amidinylindole-3-carbaldehydes 1 are the key starting materials for the preparation of three classes of carbolines 2, 6 and 7 in which the pyridine ring is characterised by a different substitution patterns. The carbolines 2 which are functionalized with an amino group in position 2, were obtained directly by heating 1 in presence of SiO2. The condensation of amidines 1 with arylmethylketones afforded unsaturated ketones 5 which on heating were transformed into 2, 9-dialkyl-3-aroyl-9H-pyrido[2,3-b]indoles 7. Instead, prolonged reaction of amidines 1 with arylmethylketones in t-BuOH/t-BuOK gave 2-aryl-9H-pyrido[2,3-b]indoles 6. (C) 2000 Elsevier Science Ltd. All rights reserved.
Platinum(IV)-Catalyzed Synthesis of Unsymmetrical Polysubstituted Benzenes<i>via</i>Intramolecular Cycloaromatization Reaction
作者:Shuyan Zheng、Jinghua Zhang、Zhengwu Shen
DOI:10.1002/adsc.201500573
日期:2015.9.14
A one‐pot synthesis of polysubstitutedbenzene derivatives was achieved via a platinum(IV)‐catalyzed intramolecular cycloaromatization reaction. The reaction proceeds via a tandem skeletal rearrangment, dehydration and double bond isomerization, which proved to be very useful for the syntheses of a range of interesting polyalkyl‐substitutedbenzenes.
Pyridazinones endowed with acaricide and insecticide action
申请人:Ministero dell'Universita' e della Ricerca Scientifica e Technologica
公开号:US05286725A1
公开(公告)日:1994-02-15
There are described new pyridazinones endowed with acaricide and insecticide action, having general formula (I): ##STR1## wherein X is halo or alkyl, Z is alkylene and R is substituted cyclohexyl or cyclohexenyl.
Stereochemical Control of N,N-Disubstitution in Alkynylaminocarbene Complexes of Chromium(0) and Tungsten(0)
作者:Ramon Sabaté,、Ute Schick、Josep M. Moretó、Susagna Ricart
DOI:10.1021/om960159d
日期:1996.8.6
Stereocontrol in the introduction of substituents on the nitrogen of alkynylaminocarbene complexes can be achieved by a proper sequential aminolysis of the starting alkoxy carbene analogs followed by treatment of the resulting (E-alkylamino)carbene complex with Cs2CO3 in the presence of the desired electrophile. The use of Cs2CO3 as a base affords good yields of N,N-disubstituted alkynylcarbene complexes
可以通过适当顺序地对起始烷氧基卡宾类似物进行氨解,然后在所需的存在下用Cs 2 CO 3处理所得的(E-烷基氨基)卡宾配合物,来实现在炔基氨基卡宾配合物的氮上引入取代基的立体控制。亲电的。使用Cs 2 CO 3作为碱可提供良好产率的N,N-二取代的炔基卡宾配合物。在这种情况下,避免了针对其他系统描述的异构化。该反应也适用于大体积的亲电试剂,如(-)-甲基吡啶基或(-)-紫苏烷基溴化物,也适用于芳基卡宾络合物。
Isothiazole dioxides: synthesis and inhibition of Trypanosoma brucei protein farnesyltransferase
作者:Francesca Clerici、Maria Luisa Gelmi、Kohei Yokoyama、Donato Pocar、Wesley C. Van Voorhis、Frederick S. Buckner、Michael H. Gelb
DOI:10.1016/s0960-894x(02)00338-4
日期:2002.8
A series of isothiazole dioxides was synthesized and evaluated as inhibitors of protein farnesyltransferase from the parasite that causes African sleeping sickness (Trypanosoma brucei). The most potent compound in the series inhibited the parasite enzyme with an IC50 of 2 muM and blocked the growth of the bloodstream parasite in vitro with an ED50 of 10 muM. The same compound inhibited rat protein farnesyltransferase and protein geranylgeranyltransferase type I only at much higher concentration. (C) 2002 Elsevier Science Ltd. All rights reserved.
2-tButyl-4-chloro-5-(4-ibutylmethylcyclohexyl)-methylthio-3(H)-pyridazinone having acaricidal and insecticidal activity
申请人:MINISTERO DELL' UNIVERSITA' E DELLA RICERCA SCIENTIFICA E TECNOLOGICA