zinc bromides and regioconvergent Negishi coupling with aryl or alkenyl triflates. The use of a suitable phosphine ligand favoring Pd migration enabled the selective formation of the linear cross‐coupling product. Subsequently, mixtures of secondary alkyl bromides were prepared from linear alkanes by standard bromination, and regioconvergent cross‐coupling then provided access to the corresponding linear
New One-pot Cross-coupling Reaction between Grignard Reagents and Alkoxymethyldiphenylphosphonium Iodides in situ-Formed from Alcohols, Chlorodiphenylphosphine and Iodomethane
A new one-pot cross-coupling reactionbetweenGrignardreagents and alkoxymethyldiphenylphosphonium iodides, which were in situ-formed from nBuLi-treated alcohols, chlorodiphenylphosphine and iodomethane, proceeded smoothly to afford the corresponding coupling products in good to high yields.
Alkylation of Aldehyde (Arenesulfonyl)hydrazones with Trialkylboranes
作者:George W. Kabalka、John T. Maddox、Ekaterini Bogas、Shane W. Kelley
DOI:10.1021/jo962089q
日期:1997.5.1
(Arenesulfonyl)hydrazone derivatives of aryl aldehydes are readily alkylated by trialkylboranes in the presence of base to generate new organoboranes that may be converted to the corresponding substituted alkanes or alcohols depending upon the reaction conditions chosen. Both tosyl- and trisylhydrazone derivatives can be utilized in the reaction, which tolerates a variety of functional groups, making it a versatile alternative to both the Grignard and Suzuki-coupling reactions.
Fused Heterocyclic Compounds as Ion Channel Modulators
申请人:Kobayashi Tetsuya
公开号:US20120010192A1
公开(公告)日:2012-01-12
The present disclosure relates to compounds that are sodium channel inhibitors and to their use in the treatment of various disease states, including cardiovascular diseases and diabetes. In particular embodiments, the structure of the compounds is given by Formula I:
wherein R
1
, R
2
, R
3
, R
4
, and R
5
are as described herein, to methods for the preparation and use of the compounds and to pharmaceutical compositions containing the same.
作者:Laurine R. Zupp、Veronica L. Campanella、DiAndra M. Rudzinski、François Beland、Ronny Priefer
DOI:10.1016/j.tetlet.2012.07.131
日期:2012.9
yields in shorter reaction times. This decreases total ‘man-hours’ in a synthetic setting. Another technique used in organic chemistry to decrease manual manipulations, is solid support reagents. The benefits of this approach is that upon completion of a reaction, a simple filtration can be performed which expedites the work-up and also produces less organic waste. Friedel-Crafts alkylation has been