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Construction of a Tetracyclic Butterfly-Like Scaffold: Palladium-Catalyzed Heck/Arylation Cascade
Kim, Ko Hoon,Lee, Hyun Seung,Kim, Sung Hwan,Kim, Se Hee,Kim, Jae Nyoung WILEY-VCH Verlag 2010 Chemistry Vol.16 No.8
<B>Graphic Abstract</B> <P>Controlled carbopalladation: Only slight changes in the starting material (see scheme) resulted in rather different compounds in palladium-catalyzed domino reactions. A novel tetracyclic butterfly-like scaffold was constructed in a one-pot reaction via the Pd-catalyzed 5-exo-trig carbopalladation and arylation cascade in high yield. <img src='wiley_img/09476539-2010-16-8-CHEM200903029-content.gif' alt='wiley_img/09476539-2010-16-8-CHEM200903029-content'> </P>
Kim, Jae Yun,Kim, Soo Nyoung,Park, Chulmin,Lim, Ho Young,Kim, Jae Hun The Korean Pain Society 2019 The Korean Journal of Pain Vol.32 No.1
Background: Lumbosacral transforaminal epidural injection (TFEI) is an effective treatment for spinal disease. However, TFEI may have several types of complications, some of which can be attributed to intravascular injection. We reviewed studies to compare the intravascular injection rate among different needle types. Methods: We searched the literature for articles on the intravascular injection rate among different needle types used in TFEI. The search was performed using PubMed, MEDLINE, the Cochrane Library, EMBASE, and Web of Science. Results: A total of six studies comprising 2359 patients were identified. Compared with the Quincke needle, the Whitacre needle reduced the intravascular injection rate (OR = 0.57, 95% CI = [0.44-0.73], P < 0.001). However, compared with the Quincke needle, the Chiba needle did not reduce the intravascular injection rate (OR = 0.80, 95% CI = [0.44-1.45], P = 0.46). In one study, the intravascular injection rate using a blunt-tip needle was lower than that using a sharp needle. In another study, the Whitacre and the blunt-tip needle have similar intravascular injection rates, while, the catheter-extension needle showed a reduced intravascular injection rate. Conclusions: This meta-analysis showed that the Whitacre needle reduced the intravascular injection rate as compared with the Quincke needle, but failed to establish that the Chiba needle can decrease the intravascular injection rate in TFEI. Moreover, the blunt-tip needle can reduce the intravascular injection rate compared with the Quincke needle, and the catheter-extension needle can reduce the intravascular injection rate compared with the Whitacre and the blunt-tip needle.
Kim, Sung Hwan,Lee, Sangku,Kim, Se Hee,Kim, Ko Hoon,Kim, Jae Nyoung Korean Chemical Society 2013 Bulletin of the Korean Chemical Society Vol.34 No.11
The reaction of 1,3,5-triketones and arylhydrazines provided indolylpyrazole derivatives in a one-pot reaction in good to moderate yields. Both the pyrazole and indole rings were constructed simultaneously with phenylhydrazine, $RCOCH_2CO$- moiety for the pyrazole and the remaining -$CH_2COR$ part for the indole ring.
Kim, Ko Hoon,Lim, Jin Woo,Moon, Hye Ran,Kim, Jae Nyoung Korean Chemical Society 2014 Bulletin of the Korean Chemical Society Vol.35 No.11
Intramolecular Diels-Alder (IMDA) reaction of vinylarenes bearing a Z-alkenyl tether, prepared from Morita-Baylis-Hillman (MBH) adducts, afforded arene-fused isoindoline derivatives in good yields. Vinylfurans, vinylthiophenes, and vinylnaphthalenes could be used successfully as dienes, while vinylbenzene failed under the same reaction conditions.