A palladium-catalyzeddesulfitative cyanation of arenesulfonylchlorides and sodium sulfinates has been developed, providing aryl nitriles in moderate to excellent yields. It represents a facile procedure to access aryl nitriles.
PYRAZOLONE DERIVATIVE AND PDE INHIBITOR CONTAINING THE SAME AS ACTIVE INGREDIENT
申请人:Kyorin Pharmaceutical Co., Ltd.
公开号:EP2168960A1
公开(公告)日:2010-03-31
It is to provide a novel pyrazolone derivative represented by the following general formula (1), which is useful as a pharmaceutical and has a phosphodiesterase inhibitory action:
wherein R1,R2: C1-6 alkyl; R3,R4: H, X, C1-6 alkoxy; Z:O, S; A:AA, BB, wherein AA represents
wherein BB represents
wherein R5: H, C1-6 alkyl ; R6,R7: C1-6 alkyl.
提供一种新颖的吡唑酮衍生物, represented by the following general formula (1),该衍生物可用作药物,并具有磷酸二酯酶抑制作用:
其中 R1,R2:C1-6烷基;R3,R4:H,X,C1-6烷氧基;Z:O,S;A:AA,BB,其中AA代表
其中BB代表
其中R5:H,C1-6烷基;R6,R7:C1-6烷基。
Kinetics of the reaction of methyl 4-nitrobenzenesul-fonate + Br− in ethanol amine based surfactants
作者:Michael M. Mohareb、Kallol K. Ghosh、Rama M. Palepu
DOI:10.1002/kin.20162
日期:2006.5
The kinetics of the reaction of methyl 4-nitrobenzenesulfonate + Br− ions has been studied in ethanol amine based (alkyldimethylethanolammonium bromide and alkyldiethylethanolammonium bromide) surfactant solutions. The observed first-order rate constants increase monotonically with surfactant concentration, with hydrophobic chain length and with head group bulk in a manner similar to other quaternary
An efficient and selective method for the synthesis of sulfonic esters from sulfonic acids or sodium sulfonates using polymer-bound primary triazenes based upon the T2* linker has been developed. The purities of the esters obtained are usually greater than 95% without any further purification steps.
Iodine-catalyzed synthesis of sulfonyl isoxazoles from sodium sulfinates and isoxazol-5(4H)-ones
作者:Dong Tang、Zafar Iqbal、Jian Sun、Jingwen Ji、Minghua Yang、Zhixiang Yang
DOI:10.1016/j.tetlet.2020.152685
日期:2021.1
An efficient I2-mediated sulfonylation at 4-position of isoxazoles has been developed by employing sodium sulfinate and 3-substituted isoxazol-5(4H)-ones. This metal-free, one-pot strategy provides various sulfonyl isoxazoles under mild reaction conditions. The final product exists in the form of stable organic sodium salt, which can be purified by column chromatography under air.