Synthesis and Structure of Di[methoxy(ethoxy)carbonylamino-1H-benzimidazol-5-yl] Ethers
作者:V. S. Pilyugin、Yu. E. Sapozhnikov、G. V. Kiseleva、N. A. Sapozhnikova、T. P. Vorob'eva、E. V. Klimakova
DOI:10.1007/s11176-005-0459-8
日期:2005.10
A procedure was developed for preparing di[methoxy(ethoxy)carbonylamino-1H-benzimidazol-5-yl] ethers by the reaction of methyl or ethyl chloroformate with sodium cyanamide, followed by the reaction of the resulting methyl or ethyl cyanocarbamate with 4-(3,4-diaminophenoxy)-1,2-phenylenediamine in acidic solution.
Reaction of metallo<i>S</i>-alkyl<i>N</i>-cyanodithioiminocarbonates and alkyl<i>N</i>-cyanocarbamates with hydrazine. A novel preparation of 5-amino-3-mercapto-1,2,4-triazole
作者:Lyndon K. Marble、Wallace E. Puckett、William Russell Summers
DOI:10.1002/jhet.5570350408
日期:1998.7
arbonates 7 react as electrophiles with hydrazine hydrate to form 5-amino-3-mercapto-1H-1,2,4-triazole 1. The novel 4-cyanothiosemicarbazide 9 is proposed as the intermediate which cyclizes to the aromatic triazole. The rate determining step is addition of hydrazine to the iminocarbonate and is second order. Other nucleophiles such as substitutedhydrazines and amines failed to react. Exchange of either
S-烷基-N-氰基二硫代亚氨基碳酸酯7的金属盐作为亲电子试剂与水合肼反应形成5-氨基-3-巯基-1 H -1,2,4-三唑1。提出了新型的4-氰基硫代氨基脲9作为环化成芳族三唑的中间体。速率确定步骤是将肼加到亚氨基碳酸酯中,并且是二阶的。其他亲核试剂如取代的肼和胺则无法反应。硫中的一种或两种与氧的交换导致分解或产物的混合物。
Pentaerythrite derivatives, the production and use thereof and intermediate products for the synthesis of the same
申请人:ISIS PHARMA GmbH
公开号:US06365611B1
公开(公告)日:2002-04-02
The invention relates to novel compounds derived from pentaerythrite compounds of formula (XII) and (XVI), which can be used as pharmaceutically active substances, specially in the treatment of cardiac and circulatory diseases.
New NO-Donors with Antithrombotic and Vasodilating Activities, Part 16 3-Amino-1,2,4-oxadiazol-5-ones as Prodrugs for Hydroxyguanidines
作者:Klaus Rehse、Stephan Bade
DOI:10.1002/ardp.19963291205
日期:——
This hypothesis was tested indirectly by measuring the antithrombotic properties of these compounds 2 h after oral administration to rats (60 mg/kg). In mesenteric arterioles seven compounds moderately (≥ 10%) inhibited the formation of thrombi by a laser beam. Maximum effects were observed in 6c (4‐pentyl) and 6f (4‐benzyl). The lack of activity in the corresponding 2‐pentyloxadiazolone 10c, where no