Acid-Catalyzed Intramolecular Imination / Nucleophilic Trapping of 4-Aminobutanal Derivatives: One-Pot Access to 2-(Pyrazolyl)pyrrolidines
作者:Andrey V. Smolobochkin、Tanzilya S. Rizbayeva、Almir S. Gazizov、Julia K. Voronina、Alexey B. Dobrynin、Anastasiya V. Gildebrant、Anna G. Strelnik、Ivan S. Sazykin、Alexander R. Burilov、Michail A. Pudovik、Marina A. Sazykina
DOI:10.1002/ejoc.201900868
日期:2019.9.8
A first successful synthesis of 2‐(pyrazolyl)pyrrolidines via a metal‐free approach is reported. The proposed approach relies on intramolecular imination / nucleophilic trapping of 4‐aminobutanal acetals with pyrazolones and provides easy entry to the previously unknown class of 2‐(hetaryl) substituted pyrrolidines.
Enamine-mediated Mannich reaction of cyclic <i>N</i>,<i>O</i>-acetals and amido acetals: the multigram synthesis of pyrrolidine alkaloid precursors
作者:Rakhymzhan A. Turmanov、Andrey V. Smolobochkin、Almir S. Gazizov、Tanzilya S. Rizbayeva、Danil D. Zapylkin、Julia K. Voronina、Alexandra D. Voloshina、Victor V. Syakaev、Alexey V. Kurenkov、Alexander R. Burilov、Michail A. Pudovik
DOI:10.1039/d2ob01276f
日期:——
The cooperative L-proline/Brønstedacid/base promoted reaction of 2-ethoxypyrrolidines or N-substituted 4,4-diethoxybutan-1-amines with methyl(alkyl/aryl)ketones for the synthesis of 2-(acylmethylene)pyrrolidinederivatives is reported. The key features of the developed protocol are gram-scale synthesis of the target compounds, easily available starting materials, operational simplicity and usage of
Sulfonamido substituted acetal polymers and use thereof in photosensitive compositions and lithographic printing plates
申请人:SUN CHEMICAL CORPORATION
公开号:EP0757061A2
公开(公告)日:1997-02-05
The present invention relates to binders and photosensitive compositions comprising said binders. The binder comprises units A, B, C and D, wherein A is present in an amount of 0.5 to 15 wt.% and is of the formula
B is present in an amount of 20 to 35 wt.% and is of the formula
C is present in an amount of 20 to 50 wt.% and is of the formula
wherein R1 is methyl, ethyl, propyl or isopropyl, and D is present in an amount of 25 to 70 wt.% and is of the formula
wherein
n is an integer of from 1 to 3 and
R2, R3 are hydrogen or methyl and
R4 is alkyl, aralkyl or aryl.
本发明涉及粘合剂和包含所述粘合剂的感光组合物。粘合剂由 A、B、C 和 D 单元组成,其中 A 的含量为 0.5 至 15 wt.%,其结构式为
B 的含量为 20 至 35 wt.%,其结构式为
C 的含量为 20 至 50 wt.%,其式如下
其中 R1 为甲基、乙基、丙基或异丙基,D 的含量为 25 至 70 wt.%,其结构式为
其中
n 是 1 至 3 的整数,且
R2、R3 是氢或甲基,以及
R4 是烷基、芳基或芳基。
US5698360A
申请人:——
公开号:US5698360A
公开(公告)日:1997-12-16
Acid-catalyzed intramolecular cyclization of<i>N</i>-(4,4-diethoxybutyl)sulfonamides as a novel approach to the 1-sulfonyl-2-arylpyrrolidines
作者:Almir S. Gazizov、Andrey V. Smolobochkin、Ekaterina A. Anikina、Julia K. Voronina、Alexander R. Burilov、Michail A. Pudovik
DOI:10.1080/00397911.2016.1249288
日期:2017.1.2
ABSTRACT Herein we report our studies on the acid-catalyzed cyclisation of N-(4,4-diethoxybutyl)sulfonamides at the presence of polyatomic phenols as an efficient one-pot approach to the synthesis of 1-sulfonyl-2-arylpyrrolidines from the acyclic precursors. GRAPHICAL ABSTRACT