β-(Cycloalkylamino)ethanesulfonyl azides as novel water-soluble reagents for the synthesis of diazo compounds and heterocycles
作者:Yuri M. Shafran、Pavel S. Silaichev、Vasiliy A. Bakulev
DOI:10.1007/s10593-019-02609-z
日期:2019.12
water-soluble sulfonyl azides were synthesized, which are basic by nature. The obtained compounds were used as donors of the diazo group in the diazotransfer reaction. Due to their good solubility in water and high polarity, the byproducts formed in this case were easily separated from the desired products by washing with water or column chromatography. It was also shown that new sulfonyl azides as a result
The invention relates to a pharmaceutical composition comprising a pyrrole derivative of the following formula [1] or a pharmaceutically acceptable salt thereof, or a solvate of either of them, as an active ingredient. ##STR1## (wherein R.sup.1 represents hydrogen or alkoxycar91 bonylamino, R.sup.2 represents alkyl, aryl which may be substituted, aromatic heterocyclyl which may be substituted, unsubstituted amino, monoalkylamino, dialkylamino, or cyclic amino which may be substituted; R.sup.3 represents cyano or carbamoyl; R.sup.4 represents hydrogen or alkyl; E represents alkylene; q is equal to 0 or 1, A represents methyl, aryl which may be substituted, or aromatic heterocyclyl which may be substituted). The pharmaceutical composition of the invention is effective for the treatment of pollakiuria or urinary incontinence.
Synthesis of Non-Aromatic Pyrroles Based on the Reaction of Carbonyl Derivatives of Acetylene with 3,3-Diaminoacrylonitriles
作者:Pavel S. Silaichev、Lidia N. Dianova、Tetyana V. Beryozkina、Vera S. Berseneva、Andrey N. Maslivets、Vasiliy A. Bakulev
DOI:10.3390/molecules28083576
日期:——
The reaction of 3,3-diaminoacrylonitriles with DMAD and 1,2-dibenzoylacetylene was studied. It is shown that the direction of the reaction depends on the structure both of acetylene and of diaminoacrylonitrile. In the reaction of DMAD with acrylonitriles bearing a monosubstituted amidine group, 1-substituted 5-amino-2-oxo-pyrrole-3(2H)ylidenes are formed. On the other hand, a similar reaction of acrylonitriles
A Base‐Controlled Reaction of 2‐Cyanoacetamidines (3,3‐Diaminoacrylonitriles) with Sulfonyl Azides as a Route to Nonaromatic 4‐Methylene‐1,2,3‐triazole‐5‐imines
作者:Pavel S. Silaichev、Tetyana V. Beryozkina、Mikhail S. Novikov、Wim Dehaen、Vasiliy A. Bakulev
DOI:10.1002/ejoc.202000453
日期:2020.6.30
disproved by this study. Thus, the reaction of 2‐cyanoacetamidines with sulfonyl azides afforded different types of 1,2,3‐triazoles. Mesyl azide reacts with 2‐cyanoacetamidines in the absence of a base to afford 5‐amino‐4‐cyano‐1,2,3‐triazole. The use of a strong base switches the direction of the reaction in favor of nonaromatic 4‐methylene‐1,2,3‐triazole‐5‐imines.