103-19-5 Copper-catalyzed sulfenylation of boronic acids with sulfonyl hydrazides

-
An unprecedented sulfenylation reaction of carbon-boron bonds has been developed using sulfonyl hydrazides as sulfenyl sources. A range of sulfonyl hydrazides underwent tetrakis(acetonitrile)copper(I) tetrafluoroborate [Cu(CH3CN)4BF4]/2,2′-bipyridine-catalyzed sulfenylation with boronic acids under air to give structurally diverse thioethers in moderate to good yields. Preliminary mechanistic studies show that sulfonyl hydrazides are subjected to decomposition into thiosulfonates and disulfides followed by formation of carbon-sulfur bonds with boronic acids. https://www.lookchem.com/CASDataBase_103-19-5.htm

评论

发表评论

此博客中的热门博文

1023-17-2 Syntheses, structures, and catalytic activity in Friedel–Crafts acylations of substituted tetramethylcyclopentadienyl molybdenum carbonyl complexes

-
Reactions of the substituted tetramethylcyclopentadienes [C 5 HMe 4 R] [R?=? t Bu, Ph, CH 2 CH 2 C(CH 3 ) 3 ] with Mo(CO) 3 (CH 3 CN) 3 in refluxing xylene gave a series of dinuclear molybdenum carbonyl complexes [(η 5 -C 5 Me 4 R)Mo(CO) 3 ] 2 [R?=? t Bu (1), Ph (2), CH 2 CH 2 C(CH 3 ) 3 (3)], [(η 5 -C 5 Me t Bu)Mo(μ-CO) 2 ] 2 (4)], and [(η 5 -C 5 Me 4 ) t Bu] 2 Mo 2 O 4 (μ-O) (5)], respectively. Complexes 1–5 were characterized by elemental analysis, IR, 1 H NMR, and 13 C NMR spectroscopy. In addition, their crystal structures were determined by X-ray crystal diffraction analysis. The catalytic activities of complexes 1–3 in Friedel–Crafts acylation in the presence of o-chloranil has also been investigated; the reactions were achieved under mild conditions to give the corresponding products in moderate yields. https://www.lookchem.com/CASDataBase_1023-17-2.htm
阅读全文

7440-47-3 Influence of pulse plating on the crystal structure and orientation of chromium

-
Chromium deposits with various structures and orientations were prepared by pulse plating from a sulfate-catalyzed chromic acid solution and without formic acid addition. The influences of the puls duration, off-time, curent density, formic acid concentration, and plating time on the structure and orientation were studied by X-Ray diffraction and transmition electron microcsopy. https://www.lookchem.com/CASDataBase_7440-47-3.htm
阅读全文

Competitive price of 1405-86-3 Top quality of Glycyrrhizic acid A exporter

-
图片
https://fujie.lookchem.com/ Why choose us 1.we are special in product  Glycyrrhizic Acid A  manufacturer 2.we have sufficient licorice quota every year. 3.We are only have  Glycyrrhizic Acid A GMP  certification in china. 4.Glycyrrhizic Acid A is CHINA name,another name is Glycyrrhizic Acid. Pionnier of Licorice Extract industry in China,  Shaanxi Fujie Pharmaceutical  co.,ltd has more than 25 years experience in the sector of licorice root extraction and provides high quality products to diverse industries. 
阅读全文