Synthesis of Terminal Allenes through Copper-Mediated Cross-Coupling of Ethyne withN-Tosylhydrazones or α-Diazoesters
摘要:
Ethyne is employed as coupling partner in copper-mediated cross-coupling reactions with N-tosylhydrazones and alpha-diazoacetate, leading to the development of a new synthetic method for terminal allenes. With this novel coupling method, the terminal allenes were obtained in good yields and with excellent functional group tolerance. Copper carbene migratory insertion is proposed as the key step in these transformations.
Organomagnesium-Catalyzed Isomerization of Terminal Alkynes to Allenes and Internal Alkynes
作者:Raphaël Rochat、Koji Yamamoto、Michael J. Lopez、Haruki Nagae、Hayato Tsurugi、Kazushi Mashima
DOI:10.1002/chem.201500179
日期:2015.5.26
the transformation of these terminalalkynes into allenes and further to internalalkynes under mild conditions. To the best of our knowledge, this example is the first of an organomagnesium‐catalyzed isomerization of alkynes. Notably, the reactions proceeded through temporally separated autotandem catalysis, thus allowing the isolation of the allene or internalalkyne species in good yields. Mechanistic
Nitrogen and Sulfur-Containing Heterocycle Derivatives
申请人:Armilli Murty N.
公开号:US20110269953A1
公开(公告)日:2011-11-03
The present invention provides nitrogen and sulfur-containing heterocycle compounds to be used as scaffolds and, in particular, nitrogen and sulfur-containing heterocycle compounds having a thiomorpholine core. The compounds herein described may be useful in treating diseases such as diabetes, obesity, cancer, cardiovascular, Alzheimer's, inflammatory, antidepressant, rheumatoid arthritis, multiple sclerosis, allergic rhinitis, asthma as well as viral and bacterial infections. The compounds herein described may also be useful in treating CNS disorders such as but not limited to Schizophrenia, Alzheimer's disease (AD).